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1951 lines
47 KiB
1951 lines
47 KiB
// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) |
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// Copyright(c) 2015-18 Intel Corporation. |
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/* |
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* stream.c - SoundWire Bus stream operations. |
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*/ |
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#include <linux/delay.h> |
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#include <linux/device.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/mod_devicetable.h> |
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#include <linux/slab.h> |
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#include <linux/soundwire/sdw_registers.h> |
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#include <linux/soundwire/sdw.h> |
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#include <sound/soc.h> |
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#include "bus.h" |
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/* |
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* Array of supported rows and columns as per MIPI SoundWire Specification 1.1 |
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* |
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* The rows are arranged as per the array index value programmed |
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* in register. The index 15 has dummy value 0 in order to fill hole. |
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*/ |
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int sdw_rows[SDW_FRAME_ROWS] = {48, 50, 60, 64, 75, 80, 125, 147, |
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96, 100, 120, 128, 150, 160, 250, 0, |
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192, 200, 240, 256, 72, 144, 90, 180}; |
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EXPORT_SYMBOL(sdw_rows); |
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int sdw_cols[SDW_FRAME_COLS] = {2, 4, 6, 8, 10, 12, 14, 16}; |
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EXPORT_SYMBOL(sdw_cols); |
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int sdw_find_col_index(int col) |
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{ |
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int i; |
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for (i = 0; i < SDW_FRAME_COLS; i++) { |
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if (sdw_cols[i] == col) |
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return i; |
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} |
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pr_warn("Requested column not found, selecting lowest column no: 2\n"); |
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return 0; |
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} |
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EXPORT_SYMBOL(sdw_find_col_index); |
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int sdw_find_row_index(int row) |
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{ |
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int i; |
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for (i = 0; i < SDW_FRAME_ROWS; i++) { |
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if (sdw_rows[i] == row) |
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return i; |
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} |
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pr_warn("Requested row not found, selecting lowest row no: 48\n"); |
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return 0; |
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} |
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EXPORT_SYMBOL(sdw_find_row_index); |
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static int _sdw_program_slave_port_params(struct sdw_bus *bus, |
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struct sdw_slave *slave, |
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struct sdw_transport_params *t_params, |
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enum sdw_dpn_type type) |
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{ |
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u32 addr1, addr2, addr3, addr4; |
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int ret; |
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u16 wbuf; |
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if (bus->params.next_bank) { |
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addr1 = SDW_DPN_OFFSETCTRL2_B1(t_params->port_num); |
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addr2 = SDW_DPN_BLOCKCTRL3_B1(t_params->port_num); |
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addr3 = SDW_DPN_SAMPLECTRL2_B1(t_params->port_num); |
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addr4 = SDW_DPN_HCTRL_B1(t_params->port_num); |
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} else { |
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addr1 = SDW_DPN_OFFSETCTRL2_B0(t_params->port_num); |
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addr2 = SDW_DPN_BLOCKCTRL3_B0(t_params->port_num); |
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addr3 = SDW_DPN_SAMPLECTRL2_B0(t_params->port_num); |
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addr4 = SDW_DPN_HCTRL_B0(t_params->port_num); |
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} |
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/* Program DPN_OffsetCtrl2 registers */ |
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ret = sdw_write(slave, addr1, t_params->offset2); |
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if (ret < 0) { |
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dev_err(bus->dev, "DPN_OffsetCtrl2 register write failed\n"); |
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return ret; |
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} |
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/* Program DPN_BlockCtrl3 register */ |
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ret = sdw_write(slave, addr2, t_params->blk_pkg_mode); |
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if (ret < 0) { |
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dev_err(bus->dev, "DPN_BlockCtrl3 register write failed\n"); |
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return ret; |
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} |
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/* |
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* Data ports are FULL, SIMPLE and REDUCED. This function handles |
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* FULL and REDUCED only and beyond this point only FULL is |
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* handled, so bail out if we are not FULL data port type |
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*/ |
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if (type != SDW_DPN_FULL) |
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return ret; |
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/* Program DPN_SampleCtrl2 register */ |
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wbuf = FIELD_GET(SDW_DPN_SAMPLECTRL_HIGH, t_params->sample_interval - 1); |
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ret = sdw_write(slave, addr3, wbuf); |
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if (ret < 0) { |
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dev_err(bus->dev, "DPN_SampleCtrl2 register write failed\n"); |
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return ret; |
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} |
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/* Program DPN_HCtrl register */ |
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wbuf = FIELD_PREP(SDW_DPN_HCTRL_HSTART, t_params->hstart); |
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wbuf |= FIELD_PREP(SDW_DPN_HCTRL_HSTOP, t_params->hstop); |
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ret = sdw_write(slave, addr4, wbuf); |
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if (ret < 0) |
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dev_err(bus->dev, "DPN_HCtrl register write failed\n"); |
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return ret; |
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} |
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static int sdw_program_slave_port_params(struct sdw_bus *bus, |
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struct sdw_slave_runtime *s_rt, |
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struct sdw_port_runtime *p_rt) |
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{ |
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struct sdw_transport_params *t_params = &p_rt->transport_params; |
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struct sdw_port_params *p_params = &p_rt->port_params; |
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struct sdw_slave_prop *slave_prop = &s_rt->slave->prop; |
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u32 addr1, addr2, addr3, addr4, addr5, addr6; |
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struct sdw_dpn_prop *dpn_prop; |
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int ret; |
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u8 wbuf; |
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if (s_rt->slave->is_mockup_device) |
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return 0; |
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dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, |
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s_rt->direction, |
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t_params->port_num); |
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if (!dpn_prop) |
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return -EINVAL; |
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addr1 = SDW_DPN_PORTCTRL(t_params->port_num); |
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addr2 = SDW_DPN_BLOCKCTRL1(t_params->port_num); |
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if (bus->params.next_bank) { |
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addr3 = SDW_DPN_SAMPLECTRL1_B1(t_params->port_num); |
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addr4 = SDW_DPN_OFFSETCTRL1_B1(t_params->port_num); |
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addr5 = SDW_DPN_BLOCKCTRL2_B1(t_params->port_num); |
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addr6 = SDW_DPN_LANECTRL_B1(t_params->port_num); |
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} else { |
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addr3 = SDW_DPN_SAMPLECTRL1_B0(t_params->port_num); |
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addr4 = SDW_DPN_OFFSETCTRL1_B0(t_params->port_num); |
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addr5 = SDW_DPN_BLOCKCTRL2_B0(t_params->port_num); |
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addr6 = SDW_DPN_LANECTRL_B0(t_params->port_num); |
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} |
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/* Program DPN_PortCtrl register */ |
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wbuf = FIELD_PREP(SDW_DPN_PORTCTRL_DATAMODE, p_params->data_mode); |
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wbuf |= FIELD_PREP(SDW_DPN_PORTCTRL_FLOWMODE, p_params->flow_mode); |
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ret = sdw_update(s_rt->slave, addr1, 0xF, wbuf); |
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if (ret < 0) { |
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dev_err(&s_rt->slave->dev, |
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"DPN_PortCtrl register write failed for port %d\n", |
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t_params->port_num); |
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return ret; |
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} |
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if (!dpn_prop->read_only_wordlength) { |
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/* Program DPN_BlockCtrl1 register */ |
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ret = sdw_write(s_rt->slave, addr2, (p_params->bps - 1)); |
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if (ret < 0) { |
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dev_err(&s_rt->slave->dev, |
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"DPN_BlockCtrl1 register write failed for port %d\n", |
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t_params->port_num); |
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return ret; |
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} |
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} |
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/* Program DPN_SampleCtrl1 register */ |
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wbuf = (t_params->sample_interval - 1) & SDW_DPN_SAMPLECTRL_LOW; |
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ret = sdw_write(s_rt->slave, addr3, wbuf); |
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if (ret < 0) { |
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dev_err(&s_rt->slave->dev, |
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"DPN_SampleCtrl1 register write failed for port %d\n", |
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t_params->port_num); |
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return ret; |
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} |
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/* Program DPN_OffsetCtrl1 registers */ |
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ret = sdw_write(s_rt->slave, addr4, t_params->offset1); |
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if (ret < 0) { |
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dev_err(&s_rt->slave->dev, |
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"DPN_OffsetCtrl1 register write failed for port %d\n", |
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t_params->port_num); |
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return ret; |
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} |
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/* Program DPN_BlockCtrl2 register*/ |
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if (t_params->blk_grp_ctrl_valid) { |
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ret = sdw_write(s_rt->slave, addr5, t_params->blk_grp_ctrl); |
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if (ret < 0) { |
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dev_err(&s_rt->slave->dev, |
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"DPN_BlockCtrl2 reg write failed for port %d\n", |
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t_params->port_num); |
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return ret; |
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} |
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} |
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/* program DPN_LaneCtrl register */ |
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if (slave_prop->lane_control_support) { |
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ret = sdw_write(s_rt->slave, addr6, t_params->lane_ctrl); |
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if (ret < 0) { |
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dev_err(&s_rt->slave->dev, |
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"DPN_LaneCtrl register write failed for port %d\n", |
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t_params->port_num); |
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return ret; |
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} |
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} |
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if (dpn_prop->type != SDW_DPN_SIMPLE) { |
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ret = _sdw_program_slave_port_params(bus, s_rt->slave, |
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t_params, dpn_prop->type); |
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if (ret < 0) |
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dev_err(&s_rt->slave->dev, |
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"Transport reg write failed for port: %d\n", |
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t_params->port_num); |
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} |
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return ret; |
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} |
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static int sdw_program_master_port_params(struct sdw_bus *bus, |
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struct sdw_port_runtime *p_rt) |
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{ |
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int ret; |
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/* |
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* we need to set transport and port parameters for the port. |
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* Transport parameters refers to the sample interval, offsets and |
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* hstart/stop etc of the data. Port parameters refers to word |
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* length, flow mode etc of the port |
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*/ |
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ret = bus->port_ops->dpn_set_port_transport_params(bus, |
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&p_rt->transport_params, |
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bus->params.next_bank); |
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if (ret < 0) |
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return ret; |
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return bus->port_ops->dpn_set_port_params(bus, |
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&p_rt->port_params, |
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bus->params.next_bank); |
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} |
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/** |
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* sdw_program_port_params() - Programs transport parameters of Master(s) |
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* and Slave(s) |
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* |
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* @m_rt: Master stream runtime |
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*/ |
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static int sdw_program_port_params(struct sdw_master_runtime *m_rt) |
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{ |
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struct sdw_slave_runtime *s_rt; |
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struct sdw_bus *bus = m_rt->bus; |
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struct sdw_port_runtime *p_rt; |
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int ret = 0; |
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/* Program transport & port parameters for Slave(s) */ |
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list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
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list_for_each_entry(p_rt, &s_rt->port_list, port_node) { |
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ret = sdw_program_slave_port_params(bus, s_rt, p_rt); |
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if (ret < 0) |
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return ret; |
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} |
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} |
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/* Program transport & port parameters for Master(s) */ |
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list_for_each_entry(p_rt, &m_rt->port_list, port_node) { |
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ret = sdw_program_master_port_params(bus, p_rt); |
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if (ret < 0) |
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return ret; |
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} |
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return 0; |
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} |
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/** |
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* sdw_enable_disable_slave_ports: Enable/disable slave data port |
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* |
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* @bus: bus instance |
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* @s_rt: slave runtime |
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* @p_rt: port runtime |
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* @en: enable or disable operation |
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* |
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* This function only sets the enable/disable bits in the relevant bank, the |
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* actual enable/disable is done with a bank switch |
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*/ |
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static int sdw_enable_disable_slave_ports(struct sdw_bus *bus, |
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struct sdw_slave_runtime *s_rt, |
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struct sdw_port_runtime *p_rt, |
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bool en) |
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{ |
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struct sdw_transport_params *t_params = &p_rt->transport_params; |
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u32 addr; |
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int ret; |
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if (bus->params.next_bank) |
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addr = SDW_DPN_CHANNELEN_B1(p_rt->num); |
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else |
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addr = SDW_DPN_CHANNELEN_B0(p_rt->num); |
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/* |
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* Since bus doesn't support sharing a port across two streams, |
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* it is safe to reset this register |
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*/ |
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if (en) |
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ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask); |
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else |
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ret = sdw_write(s_rt->slave, addr, 0x0); |
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if (ret < 0) |
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dev_err(&s_rt->slave->dev, |
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"Slave chn_en reg write failed:%d port:%d\n", |
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ret, t_params->port_num); |
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return ret; |
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} |
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static int sdw_enable_disable_master_ports(struct sdw_master_runtime *m_rt, |
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struct sdw_port_runtime *p_rt, |
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bool en) |
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{ |
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struct sdw_transport_params *t_params = &p_rt->transport_params; |
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struct sdw_bus *bus = m_rt->bus; |
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struct sdw_enable_ch enable_ch; |
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int ret; |
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enable_ch.port_num = p_rt->num; |
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enable_ch.ch_mask = p_rt->ch_mask; |
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enable_ch.enable = en; |
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/* Perform Master port channel(s) enable/disable */ |
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if (bus->port_ops->dpn_port_enable_ch) { |
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ret = bus->port_ops->dpn_port_enable_ch(bus, |
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&enable_ch, |
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bus->params.next_bank); |
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if (ret < 0) { |
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dev_err(bus->dev, |
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"Master chn_en write failed:%d port:%d\n", |
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ret, t_params->port_num); |
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return ret; |
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} |
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} else { |
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dev_err(bus->dev, |
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"dpn_port_enable_ch not supported, %s failed\n", |
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en ? "enable" : "disable"); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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/** |
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* sdw_enable_disable_ports() - Enable/disable port(s) for Master and |
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* Slave(s) |
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* |
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* @m_rt: Master stream runtime |
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* @en: mode (enable/disable) |
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*/ |
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static int sdw_enable_disable_ports(struct sdw_master_runtime *m_rt, bool en) |
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{ |
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struct sdw_port_runtime *s_port, *m_port; |
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struct sdw_slave_runtime *s_rt; |
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int ret = 0; |
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/* Enable/Disable Slave port(s) */ |
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list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
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list_for_each_entry(s_port, &s_rt->port_list, port_node) { |
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ret = sdw_enable_disable_slave_ports(m_rt->bus, s_rt, |
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s_port, en); |
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if (ret < 0) |
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return ret; |
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} |
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} |
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/* Enable/Disable Master port(s) */ |
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list_for_each_entry(m_port, &m_rt->port_list, port_node) { |
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ret = sdw_enable_disable_master_ports(m_rt, m_port, en); |
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if (ret < 0) |
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return ret; |
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} |
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return 0; |
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} |
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static int sdw_do_port_prep(struct sdw_slave_runtime *s_rt, |
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struct sdw_prepare_ch prep_ch, |
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enum sdw_port_prep_ops cmd) |
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{ |
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const struct sdw_slave_ops *ops = s_rt->slave->ops; |
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int ret; |
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if (ops->port_prep) { |
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ret = ops->port_prep(s_rt->slave, &prep_ch, cmd); |
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if (ret < 0) { |
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dev_err(&s_rt->slave->dev, |
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"Slave Port Prep cmd %d failed: %d\n", |
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cmd, ret); |
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return ret; |
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} |
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} |
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return 0; |
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} |
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static int sdw_prep_deprep_slave_ports(struct sdw_bus *bus, |
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struct sdw_slave_runtime *s_rt, |
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struct sdw_port_runtime *p_rt, |
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bool prep) |
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{ |
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struct completion *port_ready; |
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struct sdw_dpn_prop *dpn_prop; |
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struct sdw_prepare_ch prep_ch; |
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bool intr = false; |
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int ret = 0, val; |
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u32 addr; |
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prep_ch.num = p_rt->num; |
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prep_ch.ch_mask = p_rt->ch_mask; |
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dpn_prop = sdw_get_slave_dpn_prop(s_rt->slave, |
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s_rt->direction, |
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prep_ch.num); |
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if (!dpn_prop) { |
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dev_err(bus->dev, |
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"Slave Port:%d properties not found\n", prep_ch.num); |
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return -EINVAL; |
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} |
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prep_ch.prepare = prep; |
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prep_ch.bank = bus->params.next_bank; |
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if (dpn_prop->imp_def_interrupts || !dpn_prop->simple_ch_prep_sm || |
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bus->params.s_data_mode != SDW_PORT_DATA_MODE_NORMAL) |
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intr = true; |
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/* |
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* Enable interrupt before Port prepare. |
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* For Port de-prepare, it is assumed that port |
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* was prepared earlier |
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*/ |
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if (prep && intr) { |
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ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, |
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dpn_prop->imp_def_interrupts); |
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if (ret < 0) |
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return ret; |
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} |
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/* Inform slave about the impending port prepare */ |
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sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_PRE_PREP); |
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/* Prepare Slave port implementing CP_SM */ |
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if (!dpn_prop->simple_ch_prep_sm) { |
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addr = SDW_DPN_PREPARECTRL(p_rt->num); |
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if (prep) |
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ret = sdw_write(s_rt->slave, addr, p_rt->ch_mask); |
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else |
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ret = sdw_write(s_rt->slave, addr, 0x0); |
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if (ret < 0) { |
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dev_err(&s_rt->slave->dev, |
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"Slave prep_ctrl reg write failed\n"); |
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return ret; |
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} |
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/* Wait for completion on port ready */ |
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port_ready = &s_rt->slave->port_ready[prep_ch.num]; |
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wait_for_completion_timeout(port_ready, |
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msecs_to_jiffies(dpn_prop->ch_prep_timeout)); |
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val = sdw_read(s_rt->slave, SDW_DPN_PREPARESTATUS(p_rt->num)); |
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if ((val < 0) || (val & p_rt->ch_mask)) { |
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ret = (val < 0) ? val : -ETIMEDOUT; |
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dev_err(&s_rt->slave->dev, |
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"Chn prep failed for port %d: %d\n", prep_ch.num, ret); |
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return ret; |
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} |
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} |
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/* Inform slaves about ports prepared */ |
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sdw_do_port_prep(s_rt, prep_ch, SDW_OPS_PORT_POST_PREP); |
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|
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/* Disable interrupt after Port de-prepare */ |
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if (!prep && intr) |
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ret = sdw_configure_dpn_intr(s_rt->slave, p_rt->num, prep, |
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dpn_prop->imp_def_interrupts); |
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return ret; |
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} |
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static int sdw_prep_deprep_master_ports(struct sdw_master_runtime *m_rt, |
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struct sdw_port_runtime *p_rt, |
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bool prep) |
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{ |
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struct sdw_transport_params *t_params = &p_rt->transport_params; |
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struct sdw_bus *bus = m_rt->bus; |
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const struct sdw_master_port_ops *ops = bus->port_ops; |
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struct sdw_prepare_ch prep_ch; |
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int ret = 0; |
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prep_ch.num = p_rt->num; |
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prep_ch.ch_mask = p_rt->ch_mask; |
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prep_ch.prepare = prep; /* Prepare/De-prepare */ |
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prep_ch.bank = bus->params.next_bank; |
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|
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/* Pre-prepare/Pre-deprepare port(s) */ |
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if (ops->dpn_port_prep) { |
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ret = ops->dpn_port_prep(bus, &prep_ch); |
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if (ret < 0) { |
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dev_err(bus->dev, "Port prepare failed for port:%d\n", |
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t_params->port_num); |
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return ret; |
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} |
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} |
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return ret; |
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} |
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|
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/** |
|
* sdw_prep_deprep_ports() - Prepare/De-prepare port(s) for Master(s) and |
|
* Slave(s) |
|
* |
|
* @m_rt: Master runtime handle |
|
* @prep: Prepare or De-prepare |
|
*/ |
|
static int sdw_prep_deprep_ports(struct sdw_master_runtime *m_rt, bool prep) |
|
{ |
|
struct sdw_slave_runtime *s_rt; |
|
struct sdw_port_runtime *p_rt; |
|
int ret = 0; |
|
|
|
/* Prepare/De-prepare Slave port(s) */ |
|
list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
|
list_for_each_entry(p_rt, &s_rt->port_list, port_node) { |
|
ret = sdw_prep_deprep_slave_ports(m_rt->bus, s_rt, |
|
p_rt, prep); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
} |
|
|
|
/* Prepare/De-prepare Master port(s) */ |
|
list_for_each_entry(p_rt, &m_rt->port_list, port_node) { |
|
ret = sdw_prep_deprep_master_ports(m_rt, p_rt, prep); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* sdw_notify_config() - Notify bus configuration |
|
* |
|
* @m_rt: Master runtime handle |
|
* |
|
* This function notifies the Master(s) and Slave(s) of the |
|
* new bus configuration. |
|
*/ |
|
static int sdw_notify_config(struct sdw_master_runtime *m_rt) |
|
{ |
|
struct sdw_slave_runtime *s_rt; |
|
struct sdw_bus *bus = m_rt->bus; |
|
struct sdw_slave *slave; |
|
int ret = 0; |
|
|
|
if (bus->ops->set_bus_conf) { |
|
ret = bus->ops->set_bus_conf(bus, &bus->params); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
|
|
list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
|
slave = s_rt->slave; |
|
|
|
if (slave->ops->bus_config) { |
|
ret = slave->ops->bus_config(slave, &bus->params); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Notify Slave: %d failed\n", |
|
slave->dev_num); |
|
return ret; |
|
} |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* sdw_program_params() - Program transport and port parameters for Master(s) |
|
* and Slave(s) |
|
* |
|
* @bus: SDW bus instance |
|
* @prepare: true if sdw_program_params() is called by _prepare. |
|
*/ |
|
static int sdw_program_params(struct sdw_bus *bus, bool prepare) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
int ret = 0; |
|
|
|
list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { |
|
|
|
/* |
|
* this loop walks through all master runtimes for a |
|
* bus, but the ports can only be configured while |
|
* explicitly preparing a stream or handling an |
|
* already-prepared stream otherwise. |
|
*/ |
|
if (!prepare && |
|
m_rt->stream->state == SDW_STREAM_CONFIGURED) |
|
continue; |
|
|
|
ret = sdw_program_port_params(m_rt); |
|
if (ret < 0) { |
|
dev_err(bus->dev, |
|
"Program transport params failed: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
ret = sdw_notify_config(m_rt); |
|
if (ret < 0) { |
|
dev_err(bus->dev, |
|
"Notify bus config failed: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
/* Enable port(s) on alternate bank for all active streams */ |
|
if (m_rt->stream->state != SDW_STREAM_ENABLED) |
|
continue; |
|
|
|
ret = sdw_enable_disable_ports(m_rt, true); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Enable channel failed: %d\n", ret); |
|
return ret; |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count) |
|
{ |
|
int col_index, row_index; |
|
bool multi_link; |
|
struct sdw_msg *wr_msg; |
|
u8 *wbuf; |
|
int ret; |
|
u16 addr; |
|
|
|
wr_msg = kzalloc(sizeof(*wr_msg), GFP_KERNEL); |
|
if (!wr_msg) |
|
return -ENOMEM; |
|
|
|
bus->defer_msg.msg = wr_msg; |
|
|
|
wbuf = kzalloc(sizeof(*wbuf), GFP_KERNEL); |
|
if (!wbuf) { |
|
ret = -ENOMEM; |
|
goto error_1; |
|
} |
|
|
|
/* Get row and column index to program register */ |
|
col_index = sdw_find_col_index(bus->params.col); |
|
row_index = sdw_find_row_index(bus->params.row); |
|
wbuf[0] = col_index | (row_index << 3); |
|
|
|
if (bus->params.next_bank) |
|
addr = SDW_SCP_FRAMECTRL_B1; |
|
else |
|
addr = SDW_SCP_FRAMECTRL_B0; |
|
|
|
sdw_fill_msg(wr_msg, NULL, addr, 1, SDW_BROADCAST_DEV_NUM, |
|
SDW_MSG_FLAG_WRITE, wbuf); |
|
wr_msg->ssp_sync = true; |
|
|
|
/* |
|
* Set the multi_link flag only when both the hardware supports |
|
* and hardware-based sync is required |
|
*/ |
|
multi_link = bus->multi_link && (m_rt_count >= bus->hw_sync_min_links); |
|
|
|
if (multi_link) |
|
ret = sdw_transfer_defer(bus, wr_msg, &bus->defer_msg); |
|
else |
|
ret = sdw_transfer(bus, wr_msg); |
|
|
|
if (ret < 0 && ret != -ENODATA) { |
|
dev_err(bus->dev, "Slave frame_ctrl reg write failed\n"); |
|
goto error; |
|
} |
|
|
|
if (!multi_link) { |
|
kfree(wr_msg); |
|
kfree(wbuf); |
|
bus->defer_msg.msg = NULL; |
|
bus->params.curr_bank = !bus->params.curr_bank; |
|
bus->params.next_bank = !bus->params.next_bank; |
|
} |
|
|
|
return 0; |
|
|
|
error: |
|
kfree(wbuf); |
|
error_1: |
|
kfree(wr_msg); |
|
bus->defer_msg.msg = NULL; |
|
return ret; |
|
} |
|
|
|
/** |
|
* sdw_ml_sync_bank_switch: Multilink register bank switch |
|
* |
|
* @bus: SDW bus instance |
|
* |
|
* Caller function should free the buffers on error |
|
*/ |
|
static int sdw_ml_sync_bank_switch(struct sdw_bus *bus) |
|
{ |
|
unsigned long time_left; |
|
|
|
if (!bus->multi_link) |
|
return 0; |
|
|
|
/* Wait for completion of transfer */ |
|
time_left = wait_for_completion_timeout(&bus->defer_msg.complete, |
|
bus->bank_switch_timeout); |
|
|
|
if (!time_left) { |
|
dev_err(bus->dev, "Controller Timed out on bank switch\n"); |
|
return -ETIMEDOUT; |
|
} |
|
|
|
bus->params.curr_bank = !bus->params.curr_bank; |
|
bus->params.next_bank = !bus->params.next_bank; |
|
|
|
if (bus->defer_msg.msg) { |
|
kfree(bus->defer_msg.msg->buf); |
|
kfree(bus->defer_msg.msg); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int do_bank_switch(struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
const struct sdw_master_ops *ops; |
|
struct sdw_bus *bus; |
|
bool multi_link = false; |
|
int m_rt_count; |
|
int ret = 0; |
|
|
|
m_rt_count = stream->m_rt_count; |
|
|
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
ops = bus->ops; |
|
|
|
if (bus->multi_link && m_rt_count >= bus->hw_sync_min_links) { |
|
multi_link = true; |
|
mutex_lock(&bus->msg_lock); |
|
} |
|
|
|
/* Pre-bank switch */ |
|
if (ops->pre_bank_switch) { |
|
ret = ops->pre_bank_switch(bus); |
|
if (ret < 0) { |
|
dev_err(bus->dev, |
|
"Pre bank switch op failed: %d\n", ret); |
|
goto msg_unlock; |
|
} |
|
} |
|
|
|
/* |
|
* Perform Bank switch operation. |
|
* For multi link cases, the actual bank switch is |
|
* synchronized across all Masters and happens later as a |
|
* part of post_bank_switch ops. |
|
*/ |
|
ret = sdw_bank_switch(bus, m_rt_count); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
|
goto error; |
|
} |
|
} |
|
|
|
/* |
|
* For multi link cases, it is expected that the bank switch is |
|
* triggered by the post_bank_switch for the first Master in the list |
|
* and for the other Masters the post_bank_switch() should return doing |
|
* nothing. |
|
*/ |
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
ops = bus->ops; |
|
|
|
/* Post-bank switch */ |
|
if (ops->post_bank_switch) { |
|
ret = ops->post_bank_switch(bus); |
|
if (ret < 0) { |
|
dev_err(bus->dev, |
|
"Post bank switch op failed: %d\n", |
|
ret); |
|
goto error; |
|
} |
|
} else if (multi_link) { |
|
dev_err(bus->dev, |
|
"Post bank switch ops not implemented\n"); |
|
goto error; |
|
} |
|
|
|
/* Set the bank switch timeout to default, if not set */ |
|
if (!bus->bank_switch_timeout) |
|
bus->bank_switch_timeout = DEFAULT_BANK_SWITCH_TIMEOUT; |
|
|
|
/* Check if bank switch was successful */ |
|
ret = sdw_ml_sync_bank_switch(bus); |
|
if (ret < 0) { |
|
dev_err(bus->dev, |
|
"multi link bank switch failed: %d\n", ret); |
|
goto error; |
|
} |
|
|
|
if (multi_link) |
|
mutex_unlock(&bus->msg_lock); |
|
} |
|
|
|
return ret; |
|
|
|
error: |
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
if (bus->defer_msg.msg) { |
|
kfree(bus->defer_msg.msg->buf); |
|
kfree(bus->defer_msg.msg); |
|
} |
|
} |
|
|
|
msg_unlock: |
|
|
|
if (multi_link) { |
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
if (mutex_is_locked(&bus->msg_lock)) |
|
mutex_unlock(&bus->msg_lock); |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* sdw_release_stream() - Free the assigned stream runtime |
|
* |
|
* @stream: SoundWire stream runtime |
|
* |
|
* sdw_release_stream should be called only once per stream |
|
*/ |
|
void sdw_release_stream(struct sdw_stream_runtime *stream) |
|
{ |
|
kfree(stream); |
|
} |
|
EXPORT_SYMBOL(sdw_release_stream); |
|
|
|
/** |
|
* sdw_alloc_stream() - Allocate and return stream runtime |
|
* |
|
* @stream_name: SoundWire stream name |
|
* |
|
* Allocates a SoundWire stream runtime instance. |
|
* sdw_alloc_stream should be called only once per stream. Typically |
|
* invoked from ALSA/ASoC machine/platform driver. |
|
*/ |
|
struct sdw_stream_runtime *sdw_alloc_stream(const char *stream_name) |
|
{ |
|
struct sdw_stream_runtime *stream; |
|
|
|
stream = kzalloc(sizeof(*stream), GFP_KERNEL); |
|
if (!stream) |
|
return NULL; |
|
|
|
stream->name = stream_name; |
|
INIT_LIST_HEAD(&stream->master_list); |
|
stream->state = SDW_STREAM_ALLOCATED; |
|
stream->m_rt_count = 0; |
|
|
|
return stream; |
|
} |
|
EXPORT_SYMBOL(sdw_alloc_stream); |
|
|
|
static struct sdw_master_runtime |
|
*sdw_find_master_rt(struct sdw_bus *bus, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
|
|
/* Retrieve Bus handle if already available */ |
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
if (m_rt->bus == bus) |
|
return m_rt; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/** |
|
* sdw_alloc_master_rt() - Allocates and initialize Master runtime handle |
|
* |
|
* @bus: SDW bus instance |
|
* @stream_config: Stream configuration |
|
* @stream: Stream runtime handle. |
|
* |
|
* This function is to be called with bus_lock held. |
|
*/ |
|
static struct sdw_master_runtime |
|
*sdw_alloc_master_rt(struct sdw_bus *bus, |
|
struct sdw_stream_config *stream_config, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
|
|
/* |
|
* check if Master is already allocated (as a result of Slave adding |
|
* it first), if so skip allocation and go to configure |
|
*/ |
|
m_rt = sdw_find_master_rt(bus, stream); |
|
if (m_rt) |
|
goto stream_config; |
|
|
|
m_rt = kzalloc(sizeof(*m_rt), GFP_KERNEL); |
|
if (!m_rt) |
|
return NULL; |
|
|
|
/* Initialization of Master runtime handle */ |
|
INIT_LIST_HEAD(&m_rt->port_list); |
|
INIT_LIST_HEAD(&m_rt->slave_rt_list); |
|
list_add_tail(&m_rt->stream_node, &stream->master_list); |
|
|
|
list_add_tail(&m_rt->bus_node, &bus->m_rt_list); |
|
|
|
stream_config: |
|
m_rt->ch_count = stream_config->ch_count; |
|
m_rt->bus = bus; |
|
m_rt->stream = stream; |
|
m_rt->direction = stream_config->direction; |
|
|
|
return m_rt; |
|
} |
|
|
|
/** |
|
* sdw_alloc_slave_rt() - Allocate and initialize Slave runtime handle. |
|
* |
|
* @slave: Slave handle |
|
* @stream_config: Stream configuration |
|
* @stream: Stream runtime handle |
|
* |
|
* This function is to be called with bus_lock held. |
|
*/ |
|
static struct sdw_slave_runtime |
|
*sdw_alloc_slave_rt(struct sdw_slave *slave, |
|
struct sdw_stream_config *stream_config, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_slave_runtime *s_rt; |
|
|
|
s_rt = kzalloc(sizeof(*s_rt), GFP_KERNEL); |
|
if (!s_rt) |
|
return NULL; |
|
|
|
INIT_LIST_HEAD(&s_rt->port_list); |
|
s_rt->ch_count = stream_config->ch_count; |
|
s_rt->direction = stream_config->direction; |
|
s_rt->slave = slave; |
|
|
|
return s_rt; |
|
} |
|
|
|
static void sdw_master_port_release(struct sdw_bus *bus, |
|
struct sdw_master_runtime *m_rt) |
|
{ |
|
struct sdw_port_runtime *p_rt, *_p_rt; |
|
|
|
list_for_each_entry_safe(p_rt, _p_rt, &m_rt->port_list, port_node) { |
|
list_del(&p_rt->port_node); |
|
kfree(p_rt); |
|
} |
|
} |
|
|
|
static void sdw_slave_port_release(struct sdw_bus *bus, |
|
struct sdw_slave *slave, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_port_runtime *p_rt, *_p_rt; |
|
struct sdw_master_runtime *m_rt; |
|
struct sdw_slave_runtime *s_rt; |
|
|
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
list_for_each_entry(s_rt, &m_rt->slave_rt_list, m_rt_node) { |
|
if (s_rt->slave != slave) |
|
continue; |
|
|
|
list_for_each_entry_safe(p_rt, _p_rt, |
|
&s_rt->port_list, port_node) { |
|
list_del(&p_rt->port_node); |
|
kfree(p_rt); |
|
} |
|
} |
|
} |
|
} |
|
|
|
/** |
|
* sdw_release_slave_stream() - Free Slave(s) runtime handle |
|
* |
|
* @slave: Slave handle. |
|
* @stream: Stream runtime handle. |
|
* |
|
* This function is to be called with bus_lock held. |
|
*/ |
|
static void sdw_release_slave_stream(struct sdw_slave *slave, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_slave_runtime *s_rt, *_s_rt; |
|
struct sdw_master_runtime *m_rt; |
|
|
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
/* Retrieve Slave runtime handle */ |
|
list_for_each_entry_safe(s_rt, _s_rt, |
|
&m_rt->slave_rt_list, m_rt_node) { |
|
if (s_rt->slave == slave) { |
|
list_del(&s_rt->m_rt_node); |
|
kfree(s_rt); |
|
return; |
|
} |
|
} |
|
} |
|
} |
|
|
|
/** |
|
* sdw_release_master_stream() - Free Master runtime handle |
|
* |
|
* @m_rt: Master runtime node |
|
* @stream: Stream runtime handle. |
|
* |
|
* This function is to be called with bus_lock held |
|
* It frees the Master runtime handle and associated Slave(s) runtime |
|
* handle. If this is called first then sdw_release_slave_stream() will have |
|
* no effect as Slave(s) runtime handle would already be freed up. |
|
*/ |
|
static void sdw_release_master_stream(struct sdw_master_runtime *m_rt, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_slave_runtime *s_rt, *_s_rt; |
|
|
|
list_for_each_entry_safe(s_rt, _s_rt, &m_rt->slave_rt_list, m_rt_node) { |
|
sdw_slave_port_release(s_rt->slave->bus, s_rt->slave, stream); |
|
sdw_release_slave_stream(s_rt->slave, stream); |
|
} |
|
|
|
list_del(&m_rt->stream_node); |
|
list_del(&m_rt->bus_node); |
|
kfree(m_rt); |
|
} |
|
|
|
/** |
|
* sdw_stream_remove_master() - Remove master from sdw_stream |
|
* |
|
* @bus: SDW Bus instance |
|
* @stream: SoundWire stream |
|
* |
|
* This removes and frees port_rt and master_rt from a stream |
|
*/ |
|
int sdw_stream_remove_master(struct sdw_bus *bus, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt, *_m_rt; |
|
|
|
mutex_lock(&bus->bus_lock); |
|
|
|
list_for_each_entry_safe(m_rt, _m_rt, |
|
&stream->master_list, stream_node) { |
|
if (m_rt->bus != bus) |
|
continue; |
|
|
|
sdw_master_port_release(bus, m_rt); |
|
sdw_release_master_stream(m_rt, stream); |
|
stream->m_rt_count--; |
|
} |
|
|
|
if (list_empty(&stream->master_list)) |
|
stream->state = SDW_STREAM_RELEASED; |
|
|
|
mutex_unlock(&bus->bus_lock); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(sdw_stream_remove_master); |
|
|
|
/** |
|
* sdw_stream_remove_slave() - Remove slave from sdw_stream |
|
* |
|
* @slave: SDW Slave instance |
|
* @stream: SoundWire stream |
|
* |
|
* This removes and frees port_rt and slave_rt from a stream |
|
*/ |
|
int sdw_stream_remove_slave(struct sdw_slave *slave, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
mutex_lock(&slave->bus->bus_lock); |
|
|
|
sdw_slave_port_release(slave->bus, slave, stream); |
|
sdw_release_slave_stream(slave, stream); |
|
|
|
mutex_unlock(&slave->bus->bus_lock); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL(sdw_stream_remove_slave); |
|
|
|
/** |
|
* sdw_config_stream() - Configure the allocated stream |
|
* |
|
* @dev: SDW device |
|
* @stream: SoundWire stream |
|
* @stream_config: Stream configuration for audio stream |
|
* @is_slave: is API called from Slave or Master |
|
* |
|
* This function is to be called with bus_lock held. |
|
*/ |
|
static int sdw_config_stream(struct device *dev, |
|
struct sdw_stream_runtime *stream, |
|
struct sdw_stream_config *stream_config, |
|
bool is_slave) |
|
{ |
|
/* |
|
* Update the stream rate, channel and bps based on data |
|
* source. For more than one data source (multilink), |
|
* match the rate, bps, stream type and increment number of channels. |
|
* |
|
* If rate/bps is zero, it means the values are not set, so skip |
|
* comparison and allow the value to be set and stored in stream |
|
*/ |
|
if (stream->params.rate && |
|
stream->params.rate != stream_config->frame_rate) { |
|
dev_err(dev, "rate not matching, stream:%s\n", stream->name); |
|
return -EINVAL; |
|
} |
|
|
|
if (stream->params.bps && |
|
stream->params.bps != stream_config->bps) { |
|
dev_err(dev, "bps not matching, stream:%s\n", stream->name); |
|
return -EINVAL; |
|
} |
|
|
|
stream->type = stream_config->type; |
|
stream->params.rate = stream_config->frame_rate; |
|
stream->params.bps = stream_config->bps; |
|
|
|
/* TODO: Update this check during Device-device support */ |
|
if (is_slave) |
|
stream->params.ch_count += stream_config->ch_count; |
|
|
|
return 0; |
|
} |
|
|
|
static int sdw_is_valid_port_range(struct device *dev, |
|
struct sdw_port_runtime *p_rt) |
|
{ |
|
if (!SDW_VALID_PORT_RANGE(p_rt->num)) { |
|
dev_err(dev, |
|
"SoundWire: Invalid port number :%d\n", p_rt->num); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static struct sdw_port_runtime |
|
*sdw_port_alloc(struct device *dev, |
|
struct sdw_port_config *port_config, |
|
int port_index) |
|
{ |
|
struct sdw_port_runtime *p_rt; |
|
|
|
p_rt = kzalloc(sizeof(*p_rt), GFP_KERNEL); |
|
if (!p_rt) |
|
return NULL; |
|
|
|
p_rt->ch_mask = port_config[port_index].ch_mask; |
|
p_rt->num = port_config[port_index].num; |
|
|
|
return p_rt; |
|
} |
|
|
|
static int sdw_master_port_config(struct sdw_bus *bus, |
|
struct sdw_master_runtime *m_rt, |
|
struct sdw_port_config *port_config, |
|
unsigned int num_ports) |
|
{ |
|
struct sdw_port_runtime *p_rt; |
|
int i; |
|
|
|
/* Iterate for number of ports to perform initialization */ |
|
for (i = 0; i < num_ports; i++) { |
|
p_rt = sdw_port_alloc(bus->dev, port_config, i); |
|
if (!p_rt) |
|
return -ENOMEM; |
|
|
|
/* |
|
* TODO: Check port capabilities for requested |
|
* configuration (audio mode support) |
|
*/ |
|
|
|
list_add_tail(&p_rt->port_node, &m_rt->port_list); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int sdw_slave_port_config(struct sdw_slave *slave, |
|
struct sdw_slave_runtime *s_rt, |
|
struct sdw_port_config *port_config, |
|
unsigned int num_config) |
|
{ |
|
struct sdw_port_runtime *p_rt; |
|
int i, ret; |
|
|
|
/* Iterate for number of ports to perform initialization */ |
|
for (i = 0; i < num_config; i++) { |
|
p_rt = sdw_port_alloc(&slave->dev, port_config, i); |
|
if (!p_rt) |
|
return -ENOMEM; |
|
|
|
/* |
|
* TODO: Check valid port range as defined by DisCo/ |
|
* slave |
|
*/ |
|
ret = sdw_is_valid_port_range(&slave->dev, p_rt); |
|
if (ret < 0) { |
|
kfree(p_rt); |
|
return ret; |
|
} |
|
|
|
/* |
|
* TODO: Check port capabilities for requested |
|
* configuration (audio mode support) |
|
*/ |
|
|
|
list_add_tail(&p_rt->port_node, &s_rt->port_list); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* sdw_stream_add_master() - Allocate and add master runtime to a stream |
|
* |
|
* @bus: SDW Bus instance |
|
* @stream_config: Stream configuration for audio stream |
|
* @port_config: Port configuration for audio stream |
|
* @num_ports: Number of ports |
|
* @stream: SoundWire stream |
|
*/ |
|
int sdw_stream_add_master(struct sdw_bus *bus, |
|
struct sdw_stream_config *stream_config, |
|
struct sdw_port_config *port_config, |
|
unsigned int num_ports, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
int ret; |
|
|
|
mutex_lock(&bus->bus_lock); |
|
|
|
/* |
|
* For multi link streams, add the second master only if |
|
* the bus supports it. |
|
* Check if bus->multi_link is set |
|
*/ |
|
if (!bus->multi_link && stream->m_rt_count > 0) { |
|
dev_err(bus->dev, |
|
"Multilink not supported, link %d\n", bus->link_id); |
|
ret = -EINVAL; |
|
goto unlock; |
|
} |
|
|
|
m_rt = sdw_alloc_master_rt(bus, stream_config, stream); |
|
if (!m_rt) { |
|
dev_err(bus->dev, |
|
"Master runtime config failed for stream:%s\n", |
|
stream->name); |
|
ret = -ENOMEM; |
|
goto unlock; |
|
} |
|
|
|
ret = sdw_config_stream(bus->dev, stream, stream_config, false); |
|
if (ret) |
|
goto stream_error; |
|
|
|
ret = sdw_master_port_config(bus, m_rt, port_config, num_ports); |
|
if (ret) |
|
goto stream_error; |
|
|
|
stream->m_rt_count++; |
|
|
|
goto unlock; |
|
|
|
stream_error: |
|
sdw_release_master_stream(m_rt, stream); |
|
unlock: |
|
mutex_unlock(&bus->bus_lock); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(sdw_stream_add_master); |
|
|
|
/** |
|
* sdw_stream_add_slave() - Allocate and add master/slave runtime to a stream |
|
* |
|
* @slave: SDW Slave instance |
|
* @stream_config: Stream configuration for audio stream |
|
* @stream: SoundWire stream |
|
* @port_config: Port configuration for audio stream |
|
* @num_ports: Number of ports |
|
* |
|
* It is expected that Slave is added before adding Master |
|
* to the Stream. |
|
* |
|
*/ |
|
int sdw_stream_add_slave(struct sdw_slave *slave, |
|
struct sdw_stream_config *stream_config, |
|
struct sdw_port_config *port_config, |
|
unsigned int num_ports, |
|
struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_slave_runtime *s_rt; |
|
struct sdw_master_runtime *m_rt; |
|
int ret; |
|
|
|
mutex_lock(&slave->bus->bus_lock); |
|
|
|
/* |
|
* If this API is invoked by Slave first then m_rt is not valid. |
|
* So, allocate m_rt and add Slave to it. |
|
*/ |
|
m_rt = sdw_alloc_master_rt(slave->bus, stream_config, stream); |
|
if (!m_rt) { |
|
dev_err(&slave->dev, |
|
"alloc master runtime failed for stream:%s\n", |
|
stream->name); |
|
ret = -ENOMEM; |
|
goto error; |
|
} |
|
|
|
s_rt = sdw_alloc_slave_rt(slave, stream_config, stream); |
|
if (!s_rt) { |
|
dev_err(&slave->dev, |
|
"Slave runtime config failed for stream:%s\n", |
|
stream->name); |
|
ret = -ENOMEM; |
|
goto stream_error; |
|
} |
|
|
|
ret = sdw_config_stream(&slave->dev, stream, stream_config, true); |
|
if (ret) { |
|
/* |
|
* sdw_release_master_stream will release s_rt in slave_rt_list in |
|
* stream_error case, but s_rt is only added to slave_rt_list |
|
* when sdw_config_stream is successful, so free s_rt explicitly |
|
* when sdw_config_stream is failed. |
|
*/ |
|
kfree(s_rt); |
|
goto stream_error; |
|
} |
|
|
|
list_add_tail(&s_rt->m_rt_node, &m_rt->slave_rt_list); |
|
|
|
ret = sdw_slave_port_config(slave, s_rt, port_config, num_ports); |
|
if (ret) |
|
goto stream_error; |
|
|
|
/* |
|
* Change stream state to CONFIGURED on first Slave add. |
|
* Bus is not aware of number of Slave(s) in a stream at this |
|
* point so cannot depend on all Slave(s) to be added in order to |
|
* change stream state to CONFIGURED. |
|
*/ |
|
stream->state = SDW_STREAM_CONFIGURED; |
|
goto error; |
|
|
|
stream_error: |
|
/* |
|
* we hit error so cleanup the stream, release all Slave(s) and |
|
* Master runtime |
|
*/ |
|
sdw_release_master_stream(m_rt, stream); |
|
error: |
|
mutex_unlock(&slave->bus->bus_lock); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(sdw_stream_add_slave); |
|
|
|
/** |
|
* sdw_get_slave_dpn_prop() - Get Slave port capabilities |
|
* |
|
* @slave: Slave handle |
|
* @direction: Data direction. |
|
* @port_num: Port number |
|
*/ |
|
struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave, |
|
enum sdw_data_direction direction, |
|
unsigned int port_num) |
|
{ |
|
struct sdw_dpn_prop *dpn_prop; |
|
u8 num_ports; |
|
int i; |
|
|
|
if (direction == SDW_DATA_DIR_TX) { |
|
num_ports = hweight32(slave->prop.source_ports); |
|
dpn_prop = slave->prop.src_dpn_prop; |
|
} else { |
|
num_ports = hweight32(slave->prop.sink_ports); |
|
dpn_prop = slave->prop.sink_dpn_prop; |
|
} |
|
|
|
for (i = 0; i < num_ports; i++) { |
|
if (dpn_prop[i].num == port_num) |
|
return &dpn_prop[i]; |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/** |
|
* sdw_acquire_bus_lock: Acquire bus lock for all Master runtime(s) |
|
* |
|
* @stream: SoundWire stream |
|
* |
|
* Acquire bus_lock for each of the master runtime(m_rt) part of this |
|
* stream to reconfigure the bus. |
|
* NOTE: This function is called from SoundWire stream ops and is |
|
* expected that a global lock is held before acquiring bus_lock. |
|
*/ |
|
static void sdw_acquire_bus_lock(struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
struct sdw_bus *bus; |
|
|
|
/* Iterate for all Master(s) in Master list */ |
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
|
|
mutex_lock(&bus->bus_lock); |
|
} |
|
} |
|
|
|
/** |
|
* sdw_release_bus_lock: Release bus lock for all Master runtime(s) |
|
* |
|
* @stream: SoundWire stream |
|
* |
|
* Release the previously held bus_lock after reconfiguring the bus. |
|
* NOTE: This function is called from SoundWire stream ops and is |
|
* expected that a global lock is held before releasing bus_lock. |
|
*/ |
|
static void sdw_release_bus_lock(struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
struct sdw_bus *bus; |
|
|
|
/* Iterate for all Master(s) in Master list */ |
|
list_for_each_entry_reverse(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
mutex_unlock(&bus->bus_lock); |
|
} |
|
} |
|
|
|
static int _sdw_prepare_stream(struct sdw_stream_runtime *stream, |
|
bool update_params) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
struct sdw_bus *bus = NULL; |
|
struct sdw_master_prop *prop; |
|
struct sdw_bus_params params; |
|
int ret; |
|
|
|
/* Prepare Master(s) and Slave(s) port(s) associated with stream */ |
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
prop = &bus->prop; |
|
memcpy(¶ms, &bus->params, sizeof(params)); |
|
|
|
/* TODO: Support Asynchronous mode */ |
|
if ((prop->max_clk_freq % stream->params.rate) != 0) { |
|
dev_err(bus->dev, "Async mode not supported\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (!update_params) |
|
goto program_params; |
|
|
|
/* Increment cumulative bus bandwidth */ |
|
/* TODO: Update this during Device-Device support */ |
|
bus->params.bandwidth += m_rt->stream->params.rate * |
|
m_rt->ch_count * m_rt->stream->params.bps; |
|
|
|
/* Compute params */ |
|
if (bus->compute_params) { |
|
ret = bus->compute_params(bus); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Compute params failed: %d\n", |
|
ret); |
|
return ret; |
|
} |
|
} |
|
|
|
program_params: |
|
/* Program params */ |
|
ret = sdw_program_params(bus, true); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Program params failed: %d\n", ret); |
|
goto restore_params; |
|
} |
|
} |
|
|
|
if (!bus) { |
|
pr_err("Configuration error in %s\n", __func__); |
|
return -EINVAL; |
|
} |
|
|
|
ret = do_bank_switch(stream); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
|
goto restore_params; |
|
} |
|
|
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
|
|
/* Prepare port(s) on the new clock configuration */ |
|
ret = sdw_prep_deprep_ports(m_rt, true); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Prepare port(s) failed ret = %d\n", |
|
ret); |
|
return ret; |
|
} |
|
} |
|
|
|
stream->state = SDW_STREAM_PREPARED; |
|
|
|
return ret; |
|
|
|
restore_params: |
|
memcpy(&bus->params, ¶ms, sizeof(params)); |
|
return ret; |
|
} |
|
|
|
/** |
|
* sdw_prepare_stream() - Prepare SoundWire stream |
|
* |
|
* @stream: Soundwire stream |
|
* |
|
* Documentation/driver-api/soundwire/stream.rst explains this API in detail |
|
*/ |
|
int sdw_prepare_stream(struct sdw_stream_runtime *stream) |
|
{ |
|
bool update_params = true; |
|
int ret; |
|
|
|
if (!stream) { |
|
pr_err("SoundWire: Handle not found for stream\n"); |
|
return -EINVAL; |
|
} |
|
|
|
sdw_acquire_bus_lock(stream); |
|
|
|
if (stream->state == SDW_STREAM_PREPARED) { |
|
ret = 0; |
|
goto state_err; |
|
} |
|
|
|
if (stream->state != SDW_STREAM_CONFIGURED && |
|
stream->state != SDW_STREAM_DEPREPARED && |
|
stream->state != SDW_STREAM_DISABLED) { |
|
pr_err("%s: %s: inconsistent state state %d\n", |
|
__func__, stream->name, stream->state); |
|
ret = -EINVAL; |
|
goto state_err; |
|
} |
|
|
|
/* |
|
* when the stream is DISABLED, this means sdw_prepare_stream() |
|
* is called as a result of an underflow or a resume operation. |
|
* In this case, the bus parameters shall not be recomputed, but |
|
* still need to be re-applied |
|
*/ |
|
if (stream->state == SDW_STREAM_DISABLED) |
|
update_params = false; |
|
|
|
ret = _sdw_prepare_stream(stream, update_params); |
|
|
|
state_err: |
|
sdw_release_bus_lock(stream); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(sdw_prepare_stream); |
|
|
|
static int _sdw_enable_stream(struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
struct sdw_bus *bus = NULL; |
|
int ret; |
|
|
|
/* Enable Master(s) and Slave(s) port(s) associated with stream */ |
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
|
|
/* Program params */ |
|
ret = sdw_program_params(bus, false); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Program params failed: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
/* Enable port(s) */ |
|
ret = sdw_enable_disable_ports(m_rt, true); |
|
if (ret < 0) { |
|
dev_err(bus->dev, |
|
"Enable port(s) failed ret: %d\n", ret); |
|
return ret; |
|
} |
|
} |
|
|
|
if (!bus) { |
|
pr_err("Configuration error in %s\n", __func__); |
|
return -EINVAL; |
|
} |
|
|
|
ret = do_bank_switch(stream); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Bank switch failed: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
stream->state = SDW_STREAM_ENABLED; |
|
return 0; |
|
} |
|
|
|
/** |
|
* sdw_enable_stream() - Enable SoundWire stream |
|
* |
|
* @stream: Soundwire stream |
|
* |
|
* Documentation/driver-api/soundwire/stream.rst explains this API in detail |
|
*/ |
|
int sdw_enable_stream(struct sdw_stream_runtime *stream) |
|
{ |
|
int ret; |
|
|
|
if (!stream) { |
|
pr_err("SoundWire: Handle not found for stream\n"); |
|
return -EINVAL; |
|
} |
|
|
|
sdw_acquire_bus_lock(stream); |
|
|
|
if (stream->state != SDW_STREAM_PREPARED && |
|
stream->state != SDW_STREAM_DISABLED) { |
|
pr_err("%s: %s: inconsistent state state %d\n", |
|
__func__, stream->name, stream->state); |
|
ret = -EINVAL; |
|
goto state_err; |
|
} |
|
|
|
ret = _sdw_enable_stream(stream); |
|
|
|
state_err: |
|
sdw_release_bus_lock(stream); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(sdw_enable_stream); |
|
|
|
static int _sdw_disable_stream(struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
int ret; |
|
|
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
struct sdw_bus *bus = m_rt->bus; |
|
|
|
/* Disable port(s) */ |
|
ret = sdw_enable_disable_ports(m_rt, false); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Disable port(s) failed: %d\n", ret); |
|
return ret; |
|
} |
|
} |
|
stream->state = SDW_STREAM_DISABLED; |
|
|
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
struct sdw_bus *bus = m_rt->bus; |
|
|
|
/* Program params */ |
|
ret = sdw_program_params(bus, false); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Program params failed: %d\n", ret); |
|
return ret; |
|
} |
|
} |
|
|
|
ret = do_bank_switch(stream); |
|
if (ret < 0) { |
|
pr_err("Bank switch failed: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
/* make sure alternate bank (previous current) is also disabled */ |
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
struct sdw_bus *bus = m_rt->bus; |
|
|
|
/* Disable port(s) */ |
|
ret = sdw_enable_disable_ports(m_rt, false); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Disable port(s) failed: %d\n", ret); |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* sdw_disable_stream() - Disable SoundWire stream |
|
* |
|
* @stream: Soundwire stream |
|
* |
|
* Documentation/driver-api/soundwire/stream.rst explains this API in detail |
|
*/ |
|
int sdw_disable_stream(struct sdw_stream_runtime *stream) |
|
{ |
|
int ret; |
|
|
|
if (!stream) { |
|
pr_err("SoundWire: Handle not found for stream\n"); |
|
return -EINVAL; |
|
} |
|
|
|
sdw_acquire_bus_lock(stream); |
|
|
|
if (stream->state != SDW_STREAM_ENABLED) { |
|
pr_err("%s: %s: inconsistent state state %d\n", |
|
__func__, stream->name, stream->state); |
|
ret = -EINVAL; |
|
goto state_err; |
|
} |
|
|
|
ret = _sdw_disable_stream(stream); |
|
|
|
state_err: |
|
sdw_release_bus_lock(stream); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(sdw_disable_stream); |
|
|
|
static int _sdw_deprepare_stream(struct sdw_stream_runtime *stream) |
|
{ |
|
struct sdw_master_runtime *m_rt; |
|
struct sdw_bus *bus; |
|
int ret = 0; |
|
|
|
list_for_each_entry(m_rt, &stream->master_list, stream_node) { |
|
bus = m_rt->bus; |
|
/* De-prepare port(s) */ |
|
ret = sdw_prep_deprep_ports(m_rt, false); |
|
if (ret < 0) { |
|
dev_err(bus->dev, |
|
"De-prepare port(s) failed: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
/* TODO: Update this during Device-Device support */ |
|
bus->params.bandwidth -= m_rt->stream->params.rate * |
|
m_rt->ch_count * m_rt->stream->params.bps; |
|
|
|
/* Compute params */ |
|
if (bus->compute_params) { |
|
ret = bus->compute_params(bus); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Compute params failed: %d\n", |
|
ret); |
|
return ret; |
|
} |
|
} |
|
|
|
/* Program params */ |
|
ret = sdw_program_params(bus, false); |
|
if (ret < 0) { |
|
dev_err(bus->dev, "Program params failed: %d\n", ret); |
|
return ret; |
|
} |
|
} |
|
|
|
stream->state = SDW_STREAM_DEPREPARED; |
|
return do_bank_switch(stream); |
|
} |
|
|
|
/** |
|
* sdw_deprepare_stream() - Deprepare SoundWire stream |
|
* |
|
* @stream: Soundwire stream |
|
* |
|
* Documentation/driver-api/soundwire/stream.rst explains this API in detail |
|
*/ |
|
int sdw_deprepare_stream(struct sdw_stream_runtime *stream) |
|
{ |
|
int ret; |
|
|
|
if (!stream) { |
|
pr_err("SoundWire: Handle not found for stream\n"); |
|
return -EINVAL; |
|
} |
|
|
|
sdw_acquire_bus_lock(stream); |
|
|
|
if (stream->state != SDW_STREAM_PREPARED && |
|
stream->state != SDW_STREAM_DISABLED) { |
|
pr_err("%s: %s: inconsistent state state %d\n", |
|
__func__, stream->name, stream->state); |
|
ret = -EINVAL; |
|
goto state_err; |
|
} |
|
|
|
ret = _sdw_deprepare_stream(stream); |
|
|
|
state_err: |
|
sdw_release_bus_lock(stream); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(sdw_deprepare_stream); |
|
|
|
static int set_stream(struct snd_pcm_substream *substream, |
|
struct sdw_stream_runtime *sdw_stream) |
|
{ |
|
struct snd_soc_pcm_runtime *rtd = substream->private_data; |
|
struct snd_soc_dai *dai; |
|
int ret = 0; |
|
int i; |
|
|
|
/* Set stream pointer on all DAIs */ |
|
for_each_rtd_dais(rtd, i, dai) { |
|
ret = snd_soc_dai_set_sdw_stream(dai, sdw_stream, substream->stream); |
|
if (ret < 0) { |
|
dev_err(rtd->dev, "failed to set stream pointer on dai %s\n", dai->name); |
|
break; |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/** |
|
* sdw_startup_stream() - Startup SoundWire stream |
|
* |
|
* @sdw_substream: Soundwire stream |
|
* |
|
* Documentation/driver-api/soundwire/stream.rst explains this API in detail |
|
*/ |
|
int sdw_startup_stream(void *sdw_substream) |
|
{ |
|
struct snd_pcm_substream *substream = sdw_substream; |
|
struct snd_soc_pcm_runtime *rtd = substream->private_data; |
|
struct sdw_stream_runtime *sdw_stream; |
|
char *name; |
|
int ret; |
|
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
|
name = kasprintf(GFP_KERNEL, "%s-Playback", substream->name); |
|
else |
|
name = kasprintf(GFP_KERNEL, "%s-Capture", substream->name); |
|
|
|
if (!name) |
|
return -ENOMEM; |
|
|
|
sdw_stream = sdw_alloc_stream(name); |
|
if (!sdw_stream) { |
|
dev_err(rtd->dev, "alloc stream failed for substream DAI %s\n", substream->name); |
|
ret = -ENOMEM; |
|
goto error; |
|
} |
|
|
|
ret = set_stream(substream, sdw_stream); |
|
if (ret < 0) |
|
goto release_stream; |
|
return 0; |
|
|
|
release_stream: |
|
sdw_release_stream(sdw_stream); |
|
set_stream(substream, NULL); |
|
error: |
|
kfree(name); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(sdw_startup_stream); |
|
|
|
/** |
|
* sdw_shutdown_stream() - Shutdown SoundWire stream |
|
* |
|
* @sdw_substream: Soundwire stream |
|
* |
|
* Documentation/driver-api/soundwire/stream.rst explains this API in detail |
|
*/ |
|
void sdw_shutdown_stream(void *sdw_substream) |
|
{ |
|
struct snd_pcm_substream *substream = sdw_substream; |
|
struct snd_soc_pcm_runtime *rtd = substream->private_data; |
|
struct sdw_stream_runtime *sdw_stream; |
|
struct snd_soc_dai *dai; |
|
|
|
/* Find stream from first CPU DAI */ |
|
dai = asoc_rtd_to_cpu(rtd, 0); |
|
|
|
sdw_stream = snd_soc_dai_get_sdw_stream(dai, substream->stream); |
|
|
|
if (IS_ERR(sdw_stream)) { |
|
dev_err(rtd->dev, "no stream found for DAI %s\n", dai->name); |
|
return; |
|
} |
|
|
|
/* release memory */ |
|
kfree(sdw_stream->name); |
|
sdw_release_stream(sdw_stream); |
|
|
|
/* clear DAI data */ |
|
set_stream(substream, NULL); |
|
} |
|
EXPORT_SYMBOL(sdw_shutdown_stream);
|
|
|