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850 lines
24 KiB
850 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* HDMI Channel map support helpers |
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*/ |
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|
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#include <linux/module.h> |
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#include <sound/control.h> |
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#include <sound/tlv.h> |
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#include <sound/hda_chmap.h> |
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|
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/* |
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* CEA speaker placement: |
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* |
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* FLH FCH FRH |
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* FLW FL FLC FC FRC FR FRW |
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* |
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* LFE |
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* TC |
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* |
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* RL RLC RC RRC RR |
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* |
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* The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M corresponds to |
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* CEA RL/RR; The SMPTE channel _assignment_ C/LFE is swapped to CEA LFE/FC. |
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*/ |
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enum cea_speaker_placement { |
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FL = (1 << 0), /* Front Left */ |
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FC = (1 << 1), /* Front Center */ |
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FR = (1 << 2), /* Front Right */ |
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FLC = (1 << 3), /* Front Left Center */ |
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FRC = (1 << 4), /* Front Right Center */ |
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RL = (1 << 5), /* Rear Left */ |
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RC = (1 << 6), /* Rear Center */ |
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RR = (1 << 7), /* Rear Right */ |
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RLC = (1 << 8), /* Rear Left Center */ |
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RRC = (1 << 9), /* Rear Right Center */ |
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LFE = (1 << 10), /* Low Frequency Effect */ |
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FLW = (1 << 11), /* Front Left Wide */ |
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FRW = (1 << 12), /* Front Right Wide */ |
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FLH = (1 << 13), /* Front Left High */ |
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FCH = (1 << 14), /* Front Center High */ |
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FRH = (1 << 15), /* Front Right High */ |
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TC = (1 << 16), /* Top Center */ |
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}; |
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static const char * const cea_speaker_allocation_names[] = { |
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/* 0 */ "FL/FR", |
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/* 1 */ "LFE", |
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/* 2 */ "FC", |
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/* 3 */ "RL/RR", |
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/* 4 */ "RC", |
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/* 5 */ "FLC/FRC", |
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/* 6 */ "RLC/RRC", |
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/* 7 */ "FLW/FRW", |
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/* 8 */ "FLH/FRH", |
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/* 9 */ "TC", |
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/* 10 */ "FCH", |
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}; |
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/* |
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* ELD SA bits in the CEA Speaker Allocation data block |
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*/ |
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static const int eld_speaker_allocation_bits[] = { |
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[0] = FL | FR, |
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[1] = LFE, |
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[2] = FC, |
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[3] = RL | RR, |
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[4] = RC, |
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[5] = FLC | FRC, |
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[6] = RLC | RRC, |
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/* the following are not defined in ELD yet */ |
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[7] = FLW | FRW, |
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[8] = FLH | FRH, |
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[9] = TC, |
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[10] = FCH, |
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}; |
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/* |
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* ALSA sequence is: |
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* |
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* surround40 surround41 surround50 surround51 surround71 |
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* ch0 front left = = = = |
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* ch1 front right = = = = |
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* ch2 rear left = = = = |
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* ch3 rear right = = = = |
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* ch4 LFE center center center |
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* ch5 LFE LFE |
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* ch6 side left |
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* ch7 side right |
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* |
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* surround71 = {FL, FR, RLC, RRC, FC, LFE, RL, RR} |
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*/ |
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static int hdmi_channel_mapping[0x32][8] = { |
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/* stereo */ |
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[0x00] = { 0x00, 0x11, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 }, |
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/* 2.1 */ |
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[0x01] = { 0x00, 0x11, 0x22, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 }, |
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/* Dolby Surround */ |
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[0x02] = { 0x00, 0x11, 0x23, 0xf2, 0xf4, 0xf5, 0xf6, 0xf7 }, |
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/* surround40 */ |
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[0x08] = { 0x00, 0x11, 0x24, 0x35, 0xf3, 0xf2, 0xf6, 0xf7 }, |
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/* 4ch */ |
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[0x03] = { 0x00, 0x11, 0x23, 0x32, 0x44, 0xf5, 0xf6, 0xf7 }, |
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/* surround41 */ |
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[0x09] = { 0x00, 0x11, 0x24, 0x35, 0x42, 0xf3, 0xf6, 0xf7 }, |
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/* surround50 */ |
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[0x0a] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0xf2, 0xf6, 0xf7 }, |
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/* surround51 */ |
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[0x0b] = { 0x00, 0x11, 0x24, 0x35, 0x43, 0x52, 0xf6, 0xf7 }, |
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/* 7.1 */ |
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[0x13] = { 0x00, 0x11, 0x26, 0x37, 0x43, 0x52, 0x64, 0x75 }, |
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}; |
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/* |
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* This is an ordered list! |
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* |
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* The preceding ones have better chances to be selected by |
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* hdmi_channel_allocation(). |
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*/ |
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static struct hdac_cea_channel_speaker_allocation channel_allocations[] = { |
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/* channel: 7 6 5 4 3 2 1 0 */ |
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{ .ca_index = 0x00, .speakers = { 0, 0, 0, 0, 0, 0, FR, FL } }, |
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/* 2.1 */ |
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{ .ca_index = 0x01, .speakers = { 0, 0, 0, 0, 0, LFE, FR, FL } }, |
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/* Dolby Surround */ |
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{ .ca_index = 0x02, .speakers = { 0, 0, 0, 0, FC, 0, FR, FL } }, |
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/* surround40 */ |
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{ .ca_index = 0x08, .speakers = { 0, 0, RR, RL, 0, 0, FR, FL } }, |
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/* surround41 */ |
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{ .ca_index = 0x09, .speakers = { 0, 0, RR, RL, 0, LFE, FR, FL } }, |
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/* surround50 */ |
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{ .ca_index = 0x0a, .speakers = { 0, 0, RR, RL, FC, 0, FR, FL } }, |
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/* surround51 */ |
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{ .ca_index = 0x0b, .speakers = { 0, 0, RR, RL, FC, LFE, FR, FL } }, |
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/* 6.1 */ |
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{ .ca_index = 0x0f, .speakers = { 0, RC, RR, RL, FC, LFE, FR, FL } }, |
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/* surround71 */ |
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{ .ca_index = 0x13, .speakers = { RRC, RLC, RR, RL, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x03, .speakers = { 0, 0, 0, 0, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x04, .speakers = { 0, 0, 0, RC, 0, 0, FR, FL } }, |
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{ .ca_index = 0x05, .speakers = { 0, 0, 0, RC, 0, LFE, FR, FL } }, |
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{ .ca_index = 0x06, .speakers = { 0, 0, 0, RC, FC, 0, FR, FL } }, |
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{ .ca_index = 0x07, .speakers = { 0, 0, 0, RC, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x0c, .speakers = { 0, RC, RR, RL, 0, 0, FR, FL } }, |
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{ .ca_index = 0x0d, .speakers = { 0, RC, RR, RL, 0, LFE, FR, FL } }, |
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{ .ca_index = 0x0e, .speakers = { 0, RC, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x10, .speakers = { RRC, RLC, RR, RL, 0, 0, FR, FL } }, |
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{ .ca_index = 0x11, .speakers = { RRC, RLC, RR, RL, 0, LFE, FR, FL } }, |
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{ .ca_index = 0x12, .speakers = { RRC, RLC, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x14, .speakers = { FRC, FLC, 0, 0, 0, 0, FR, FL } }, |
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{ .ca_index = 0x15, .speakers = { FRC, FLC, 0, 0, 0, LFE, FR, FL } }, |
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{ .ca_index = 0x16, .speakers = { FRC, FLC, 0, 0, FC, 0, FR, FL } }, |
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{ .ca_index = 0x17, .speakers = { FRC, FLC, 0, 0, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x18, .speakers = { FRC, FLC, 0, RC, 0, 0, FR, FL } }, |
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{ .ca_index = 0x19, .speakers = { FRC, FLC, 0, RC, 0, LFE, FR, FL } }, |
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{ .ca_index = 0x1a, .speakers = { FRC, FLC, 0, RC, FC, 0, FR, FL } }, |
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{ .ca_index = 0x1b, .speakers = { FRC, FLC, 0, RC, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x1c, .speakers = { FRC, FLC, RR, RL, 0, 0, FR, FL } }, |
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{ .ca_index = 0x1d, .speakers = { FRC, FLC, RR, RL, 0, LFE, FR, FL } }, |
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{ .ca_index = 0x1e, .speakers = { FRC, FLC, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x1f, .speakers = { FRC, FLC, RR, RL, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x20, .speakers = { 0, FCH, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x21, .speakers = { 0, FCH, RR, RL, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x22, .speakers = { TC, 0, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x23, .speakers = { TC, 0, RR, RL, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x24, .speakers = { FRH, FLH, RR, RL, 0, 0, FR, FL } }, |
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{ .ca_index = 0x25, .speakers = { FRH, FLH, RR, RL, 0, LFE, FR, FL } }, |
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{ .ca_index = 0x26, .speakers = { FRW, FLW, RR, RL, 0, 0, FR, FL } }, |
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{ .ca_index = 0x27, .speakers = { FRW, FLW, RR, RL, 0, LFE, FR, FL } }, |
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{ .ca_index = 0x28, .speakers = { TC, RC, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x29, .speakers = { TC, RC, RR, RL, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x2a, .speakers = { FCH, RC, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x2b, .speakers = { FCH, RC, RR, RL, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x2c, .speakers = { TC, FCH, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x2d, .speakers = { TC, FCH, RR, RL, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x2e, .speakers = { FRH, FLH, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x2f, .speakers = { FRH, FLH, RR, RL, FC, LFE, FR, FL } }, |
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{ .ca_index = 0x30, .speakers = { FRW, FLW, RR, RL, FC, 0, FR, FL } }, |
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{ .ca_index = 0x31, .speakers = { FRW, FLW, RR, RL, FC, LFE, FR, FL } }, |
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}; |
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static int hdmi_pin_set_slot_channel(struct hdac_device *codec, |
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hda_nid_t pin_nid, int asp_slot, int channel) |
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{ |
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return snd_hdac_codec_write(codec, pin_nid, 0, |
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AC_VERB_SET_HDMI_CHAN_SLOT, |
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(channel << 4) | asp_slot); |
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} |
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static int hdmi_pin_get_slot_channel(struct hdac_device *codec, |
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hda_nid_t pin_nid, int asp_slot) |
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{ |
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return (snd_hdac_codec_read(codec, pin_nid, 0, |
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AC_VERB_GET_HDMI_CHAN_SLOT, |
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asp_slot) & 0xf0) >> 4; |
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} |
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static int hdmi_get_channel_count(struct hdac_device *codec, hda_nid_t cvt_nid) |
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{ |
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return 1 + snd_hdac_codec_read(codec, cvt_nid, 0, |
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AC_VERB_GET_CVT_CHAN_COUNT, 0); |
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} |
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static void hdmi_set_channel_count(struct hdac_device *codec, |
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hda_nid_t cvt_nid, int chs) |
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{ |
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if (chs != hdmi_get_channel_count(codec, cvt_nid)) |
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snd_hdac_codec_write(codec, cvt_nid, 0, |
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AC_VERB_SET_CVT_CHAN_COUNT, chs - 1); |
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} |
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/* |
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* Channel mapping routines |
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*/ |
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/* |
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* Compute derived values in channel_allocations[]. |
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*/ |
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static void init_channel_allocations(void) |
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{ |
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int i, j; |
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struct hdac_cea_channel_speaker_allocation *p; |
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for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { |
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p = channel_allocations + i; |
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p->channels = 0; |
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p->spk_mask = 0; |
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for (j = 0; j < ARRAY_SIZE(p->speakers); j++) |
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if (p->speakers[j]) { |
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p->channels++; |
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p->spk_mask |= p->speakers[j]; |
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} |
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} |
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} |
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static int get_channel_allocation_order(int ca) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { |
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if (channel_allocations[i].ca_index == ca) |
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break; |
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} |
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return i; |
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} |
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void snd_hdac_print_channel_allocation(int spk_alloc, char *buf, int buflen) |
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{ |
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int i, j; |
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for (i = 0, j = 0; i < ARRAY_SIZE(cea_speaker_allocation_names); i++) { |
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if (spk_alloc & (1 << i)) |
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j += scnprintf(buf + j, buflen - j, " %s", |
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cea_speaker_allocation_names[i]); |
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} |
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buf[j] = '\0'; /* necessary when j == 0 */ |
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} |
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EXPORT_SYMBOL_GPL(snd_hdac_print_channel_allocation); |
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/* |
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* The transformation takes two steps: |
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* |
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* eld->spk_alloc => (eld_speaker_allocation_bits[]) => spk_mask |
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* spk_mask => (channel_allocations[]) => ai->CA |
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* |
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* TODO: it could select the wrong CA from multiple candidates. |
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*/ |
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static int hdmi_channel_allocation_spk_alloc_blk(struct hdac_device *codec, |
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int spk_alloc, int channels) |
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{ |
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int i; |
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int ca = 0; |
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int spk_mask = 0; |
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char buf[SND_PRINT_CHANNEL_ALLOCATION_ADVISED_BUFSIZE]; |
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/* |
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* CA defaults to 0 for basic stereo audio |
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*/ |
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if (channels <= 2) |
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return 0; |
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/* |
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* expand ELD's speaker allocation mask |
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* |
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* ELD tells the speaker mask in a compact(paired) form, |
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* expand ELD's notions to match the ones used by Audio InfoFrame. |
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*/ |
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for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { |
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if (spk_alloc & (1 << i)) |
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spk_mask |= eld_speaker_allocation_bits[i]; |
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} |
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/* search for the first working match in the CA table */ |
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for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { |
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if (channels == channel_allocations[i].channels && |
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(spk_mask & channel_allocations[i].spk_mask) == |
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channel_allocations[i].spk_mask) { |
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ca = channel_allocations[i].ca_index; |
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break; |
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} |
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} |
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if (!ca) { |
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/* |
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* if there was no match, select the regular ALSA channel |
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* allocation with the matching number of channels |
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*/ |
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for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { |
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if (channels == channel_allocations[i].channels) { |
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ca = channel_allocations[i].ca_index; |
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break; |
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} |
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} |
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} |
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snd_hdac_print_channel_allocation(spk_alloc, buf, sizeof(buf)); |
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dev_dbg(&codec->dev, "HDMI: select CA 0x%x for %d-channel allocation: %s\n", |
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ca, channels, buf); |
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return ca; |
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} |
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static void hdmi_debug_channel_mapping(struct hdac_chmap *chmap, |
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hda_nid_t pin_nid) |
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{ |
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#ifdef CONFIG_SND_DEBUG_VERBOSE |
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int i; |
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int channel; |
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for (i = 0; i < 8; i++) { |
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channel = chmap->ops.pin_get_slot_channel( |
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chmap->hdac, pin_nid, i); |
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dev_dbg(&chmap->hdac->dev, "HDMI: ASP channel %d => slot %d\n", |
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channel, i); |
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} |
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#endif |
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} |
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static void hdmi_std_setup_channel_mapping(struct hdac_chmap *chmap, |
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hda_nid_t pin_nid, |
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bool non_pcm, |
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int ca) |
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{ |
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struct hdac_cea_channel_speaker_allocation *ch_alloc; |
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int i; |
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int err; |
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int order; |
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int non_pcm_mapping[8]; |
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order = get_channel_allocation_order(ca); |
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ch_alloc = &channel_allocations[order]; |
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if (hdmi_channel_mapping[ca][1] == 0) { |
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int hdmi_slot = 0; |
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/* fill actual channel mappings in ALSA channel (i) order */ |
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for (i = 0; i < ch_alloc->channels; i++) { |
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while (!WARN_ON(hdmi_slot >= 8) && |
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!ch_alloc->speakers[7 - hdmi_slot]) |
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hdmi_slot++; /* skip zero slots */ |
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hdmi_channel_mapping[ca][i] = (i << 4) | hdmi_slot++; |
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} |
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/* fill the rest of the slots with ALSA channel 0xf */ |
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for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) |
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if (!ch_alloc->speakers[7 - hdmi_slot]) |
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hdmi_channel_mapping[ca][i++] = (0xf << 4) | hdmi_slot; |
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} |
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if (non_pcm) { |
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for (i = 0; i < ch_alloc->channels; i++) |
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non_pcm_mapping[i] = (i << 4) | i; |
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for (; i < 8; i++) |
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non_pcm_mapping[i] = (0xf << 4) | i; |
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} |
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for (i = 0; i < 8; i++) { |
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int slotsetup = non_pcm ? non_pcm_mapping[i] : hdmi_channel_mapping[ca][i]; |
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int hdmi_slot = slotsetup & 0x0f; |
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int channel = (slotsetup & 0xf0) >> 4; |
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err = chmap->ops.pin_set_slot_channel(chmap->hdac, |
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pin_nid, hdmi_slot, channel); |
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if (err) { |
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dev_dbg(&chmap->hdac->dev, "HDMI: channel mapping failed\n"); |
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break; |
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} |
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} |
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} |
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struct channel_map_table { |
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unsigned char map; /* ALSA API channel map position */ |
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int spk_mask; /* speaker position bit mask */ |
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}; |
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static struct channel_map_table map_tables[] = { |
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{ SNDRV_CHMAP_FL, FL }, |
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{ SNDRV_CHMAP_FR, FR }, |
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{ SNDRV_CHMAP_RL, RL }, |
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{ SNDRV_CHMAP_RR, RR }, |
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{ SNDRV_CHMAP_LFE, LFE }, |
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{ SNDRV_CHMAP_FC, FC }, |
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{ SNDRV_CHMAP_RLC, RLC }, |
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{ SNDRV_CHMAP_RRC, RRC }, |
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{ SNDRV_CHMAP_RC, RC }, |
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{ SNDRV_CHMAP_FLC, FLC }, |
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{ SNDRV_CHMAP_FRC, FRC }, |
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{ SNDRV_CHMAP_TFL, FLH }, |
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{ SNDRV_CHMAP_TFR, FRH }, |
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{ SNDRV_CHMAP_FLW, FLW }, |
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{ SNDRV_CHMAP_FRW, FRW }, |
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{ SNDRV_CHMAP_TC, TC }, |
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{ SNDRV_CHMAP_TFC, FCH }, |
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{} /* terminator */ |
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}; |
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|
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/* from ALSA API channel position to speaker bit mask */ |
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int snd_hdac_chmap_to_spk_mask(unsigned char c) |
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{ |
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struct channel_map_table *t = map_tables; |
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for (; t->map; t++) { |
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if (t->map == c) |
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return t->spk_mask; |
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} |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(snd_hdac_chmap_to_spk_mask); |
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|
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/* from ALSA API channel position to CEA slot */ |
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static int to_cea_slot(int ordered_ca, unsigned char pos) |
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{ |
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int mask = snd_hdac_chmap_to_spk_mask(pos); |
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int i; |
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|
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/* Add sanity check to pass klockwork check. |
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* This should never happen. |
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*/ |
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if (ordered_ca >= ARRAY_SIZE(channel_allocations)) |
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return -1; |
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if (mask) { |
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for (i = 0; i < 8; i++) { |
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if (channel_allocations[ordered_ca].speakers[7 - i] == mask) |
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return i; |
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} |
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} |
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return -1; |
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} |
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|
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/* from speaker bit mask to ALSA API channel position */ |
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int snd_hdac_spk_to_chmap(int spk) |
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{ |
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struct channel_map_table *t = map_tables; |
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|
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for (; t->map; t++) { |
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if (t->spk_mask == spk) |
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return t->map; |
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} |
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return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(snd_hdac_spk_to_chmap); |
|
|
|
/* from CEA slot to ALSA API channel position */ |
|
static int from_cea_slot(int ordered_ca, unsigned char slot) |
|
{ |
|
int mask; |
|
|
|
/* Add sanity check to pass klockwork check. |
|
* This should never happen. |
|
*/ |
|
if (slot >= 8) |
|
return 0; |
|
|
|
mask = channel_allocations[ordered_ca].speakers[7 - slot]; |
|
|
|
return snd_hdac_spk_to_chmap(mask); |
|
} |
|
|
|
/* get the CA index corresponding to the given ALSA API channel map */ |
|
static int hdmi_manual_channel_allocation(int chs, unsigned char *map) |
|
{ |
|
int i, spks = 0, spk_mask = 0; |
|
|
|
for (i = 0; i < chs; i++) { |
|
int mask = snd_hdac_chmap_to_spk_mask(map[i]); |
|
|
|
if (mask) { |
|
spk_mask |= mask; |
|
spks++; |
|
} |
|
} |
|
|
|
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++) { |
|
if ((chs == channel_allocations[i].channels || |
|
spks == channel_allocations[i].channels) && |
|
(spk_mask & channel_allocations[i].spk_mask) == |
|
channel_allocations[i].spk_mask) |
|
return channel_allocations[i].ca_index; |
|
} |
|
return -1; |
|
} |
|
|
|
/* set up the channel slots for the given ALSA API channel map */ |
|
static int hdmi_manual_setup_channel_mapping(struct hdac_chmap *chmap, |
|
hda_nid_t pin_nid, |
|
int chs, unsigned char *map, |
|
int ca) |
|
{ |
|
int ordered_ca = get_channel_allocation_order(ca); |
|
int alsa_pos, hdmi_slot; |
|
int assignments[8] = {[0 ... 7] = 0xf}; |
|
|
|
for (alsa_pos = 0; alsa_pos < chs; alsa_pos++) { |
|
|
|
hdmi_slot = to_cea_slot(ordered_ca, map[alsa_pos]); |
|
|
|
if (hdmi_slot < 0) |
|
continue; /* unassigned channel */ |
|
|
|
assignments[hdmi_slot] = alsa_pos; |
|
} |
|
|
|
for (hdmi_slot = 0; hdmi_slot < 8; hdmi_slot++) { |
|
int err; |
|
|
|
err = chmap->ops.pin_set_slot_channel(chmap->hdac, |
|
pin_nid, hdmi_slot, assignments[hdmi_slot]); |
|
if (err) |
|
return -EINVAL; |
|
} |
|
return 0; |
|
} |
|
|
|
/* store ALSA API channel map from the current default map */ |
|
static void hdmi_setup_fake_chmap(unsigned char *map, int ca) |
|
{ |
|
int i; |
|
int ordered_ca = get_channel_allocation_order(ca); |
|
|
|
for (i = 0; i < 8; i++) { |
|
if (ordered_ca < ARRAY_SIZE(channel_allocations) && |
|
i < channel_allocations[ordered_ca].channels) |
|
map[i] = from_cea_slot(ordered_ca, hdmi_channel_mapping[ca][i] & 0x0f); |
|
else |
|
map[i] = 0; |
|
} |
|
} |
|
|
|
void snd_hdac_setup_channel_mapping(struct hdac_chmap *chmap, |
|
hda_nid_t pin_nid, bool non_pcm, int ca, |
|
int channels, unsigned char *map, |
|
bool chmap_set) |
|
{ |
|
if (!non_pcm && chmap_set) { |
|
hdmi_manual_setup_channel_mapping(chmap, pin_nid, |
|
channels, map, ca); |
|
} else { |
|
hdmi_std_setup_channel_mapping(chmap, pin_nid, non_pcm, ca); |
|
hdmi_setup_fake_chmap(map, ca); |
|
} |
|
|
|
hdmi_debug_channel_mapping(chmap, pin_nid); |
|
} |
|
EXPORT_SYMBOL_GPL(snd_hdac_setup_channel_mapping); |
|
|
|
int snd_hdac_get_active_channels(int ca) |
|
{ |
|
int ordered_ca = get_channel_allocation_order(ca); |
|
|
|
/* Add sanity check to pass klockwork check. |
|
* This should never happen. |
|
*/ |
|
if (ordered_ca >= ARRAY_SIZE(channel_allocations)) |
|
ordered_ca = 0; |
|
|
|
return channel_allocations[ordered_ca].channels; |
|
} |
|
EXPORT_SYMBOL_GPL(snd_hdac_get_active_channels); |
|
|
|
struct hdac_cea_channel_speaker_allocation *snd_hdac_get_ch_alloc_from_ca(int ca) |
|
{ |
|
return &channel_allocations[get_channel_allocation_order(ca)]; |
|
} |
|
EXPORT_SYMBOL_GPL(snd_hdac_get_ch_alloc_from_ca); |
|
|
|
int snd_hdac_channel_allocation(struct hdac_device *hdac, int spk_alloc, |
|
int channels, bool chmap_set, bool non_pcm, unsigned char *map) |
|
{ |
|
int ca; |
|
|
|
if (!non_pcm && chmap_set) |
|
ca = hdmi_manual_channel_allocation(channels, map); |
|
else |
|
ca = hdmi_channel_allocation_spk_alloc_blk(hdac, |
|
spk_alloc, channels); |
|
|
|
if (ca < 0) |
|
ca = 0; |
|
|
|
return ca; |
|
} |
|
EXPORT_SYMBOL_GPL(snd_hdac_channel_allocation); |
|
|
|
/* |
|
* ALSA API channel-map control callbacks |
|
*/ |
|
static int hdmi_chmap_ctl_info(struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_info *uinfo) |
|
{ |
|
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
|
struct hdac_chmap *chmap = info->private_data; |
|
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
|
uinfo->count = chmap->channels_max; |
|
uinfo->value.integer.min = 0; |
|
uinfo->value.integer.max = SNDRV_CHMAP_LAST; |
|
return 0; |
|
} |
|
|
|
static int hdmi_chmap_cea_alloc_validate_get_type(struct hdac_chmap *chmap, |
|
struct hdac_cea_channel_speaker_allocation *cap, int channels) |
|
{ |
|
/* If the speaker allocation matches the channel count, it is OK.*/ |
|
if (cap->channels != channels) |
|
return -1; |
|
|
|
/* all channels are remappable freely */ |
|
return SNDRV_CTL_TLVT_CHMAP_VAR; |
|
} |
|
|
|
static void hdmi_cea_alloc_to_tlv_chmap(struct hdac_chmap *hchmap, |
|
struct hdac_cea_channel_speaker_allocation *cap, |
|
unsigned int *chmap, int channels) |
|
{ |
|
int count = 0; |
|
int c; |
|
|
|
for (c = 7; c >= 0; c--) { |
|
int spk = cap->speakers[c]; |
|
|
|
if (!spk) |
|
continue; |
|
|
|
chmap[count++] = snd_hdac_spk_to_chmap(spk); |
|
} |
|
|
|
WARN_ON(count != channels); |
|
} |
|
|
|
static int spk_mask_from_spk_alloc(int spk_alloc) |
|
{ |
|
int i; |
|
int spk_mask = eld_speaker_allocation_bits[0]; |
|
|
|
for (i = 0; i < ARRAY_SIZE(eld_speaker_allocation_bits); i++) { |
|
if (spk_alloc & (1 << i)) |
|
spk_mask |= eld_speaker_allocation_bits[i]; |
|
} |
|
|
|
return spk_mask; |
|
} |
|
|
|
static int hdmi_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag, |
|
unsigned int size, unsigned int __user *tlv) |
|
{ |
|
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
|
struct hdac_chmap *chmap = info->private_data; |
|
int pcm_idx = kcontrol->private_value; |
|
unsigned int __user *dst; |
|
int chs, count = 0; |
|
unsigned long max_chs; |
|
int type; |
|
int spk_alloc, spk_mask; |
|
|
|
if (size < 8) |
|
return -ENOMEM; |
|
if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv)) |
|
return -EFAULT; |
|
size -= 8; |
|
dst = tlv + 2; |
|
|
|
spk_alloc = chmap->ops.get_spk_alloc(chmap->hdac, pcm_idx); |
|
spk_mask = spk_mask_from_spk_alloc(spk_alloc); |
|
|
|
max_chs = hweight_long(spk_mask); |
|
|
|
for (chs = 2; chs <= max_chs; chs++) { |
|
int i; |
|
struct hdac_cea_channel_speaker_allocation *cap; |
|
|
|
cap = channel_allocations; |
|
for (i = 0; i < ARRAY_SIZE(channel_allocations); i++, cap++) { |
|
int chs_bytes = chs * 4; |
|
unsigned int tlv_chmap[8]; |
|
|
|
if (cap->channels != chs) |
|
continue; |
|
|
|
if (!(cap->spk_mask == (spk_mask & cap->spk_mask))) |
|
continue; |
|
|
|
type = chmap->ops.chmap_cea_alloc_validate_get_type( |
|
chmap, cap, chs); |
|
if (type < 0) |
|
return -ENODEV; |
|
if (size < 8) |
|
return -ENOMEM; |
|
|
|
if (put_user(type, dst) || |
|
put_user(chs_bytes, dst + 1)) |
|
return -EFAULT; |
|
|
|
dst += 2; |
|
size -= 8; |
|
count += 8; |
|
|
|
if (size < chs_bytes) |
|
return -ENOMEM; |
|
|
|
size -= chs_bytes; |
|
count += chs_bytes; |
|
chmap->ops.cea_alloc_to_tlv_chmap(chmap, cap, |
|
tlv_chmap, chs); |
|
|
|
if (copy_to_user(dst, tlv_chmap, chs_bytes)) |
|
return -EFAULT; |
|
dst += chs; |
|
} |
|
} |
|
|
|
if (put_user(count, tlv + 1)) |
|
return -EFAULT; |
|
|
|
return 0; |
|
} |
|
|
|
static int hdmi_chmap_ctl_get(struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_value *ucontrol) |
|
{ |
|
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
|
struct hdac_chmap *chmap = info->private_data; |
|
int pcm_idx = kcontrol->private_value; |
|
unsigned char pcm_chmap[8]; |
|
int i; |
|
|
|
memset(pcm_chmap, 0, sizeof(pcm_chmap)); |
|
chmap->ops.get_chmap(chmap->hdac, pcm_idx, pcm_chmap); |
|
|
|
for (i = 0; i < ARRAY_SIZE(pcm_chmap); i++) |
|
ucontrol->value.integer.value[i] = pcm_chmap[i]; |
|
|
|
return 0; |
|
} |
|
|
|
static int hdmi_chmap_ctl_put(struct snd_kcontrol *kcontrol, |
|
struct snd_ctl_elem_value *ucontrol) |
|
{ |
|
struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol); |
|
struct hdac_chmap *hchmap = info->private_data; |
|
int pcm_idx = kcontrol->private_value; |
|
unsigned int ctl_idx; |
|
struct snd_pcm_substream *substream; |
|
unsigned char chmap[8], per_pin_chmap[8]; |
|
int i, err, ca, prepared = 0; |
|
|
|
/* No monitor is connected in dyn_pcm_assign. |
|
* It's invalid to setup the chmap |
|
*/ |
|
if (!hchmap->ops.is_pcm_attached(hchmap->hdac, pcm_idx)) |
|
return 0; |
|
|
|
ctl_idx = snd_ctl_get_ioffidx(kcontrol, &ucontrol->id); |
|
substream = snd_pcm_chmap_substream(info, ctl_idx); |
|
if (!substream || !substream->runtime) |
|
return 0; /* just for avoiding error from alsactl restore */ |
|
switch (substream->runtime->status->state) { |
|
case SNDRV_PCM_STATE_OPEN: |
|
case SNDRV_PCM_STATE_SETUP: |
|
break; |
|
case SNDRV_PCM_STATE_PREPARED: |
|
prepared = 1; |
|
break; |
|
default: |
|
return -EBUSY; |
|
} |
|
memset(chmap, 0, sizeof(chmap)); |
|
for (i = 0; i < ARRAY_SIZE(chmap); i++) |
|
chmap[i] = ucontrol->value.integer.value[i]; |
|
|
|
hchmap->ops.get_chmap(hchmap->hdac, pcm_idx, per_pin_chmap); |
|
if (!memcmp(chmap, per_pin_chmap, sizeof(chmap))) |
|
return 0; |
|
ca = hdmi_manual_channel_allocation(ARRAY_SIZE(chmap), chmap); |
|
if (ca < 0) |
|
return -EINVAL; |
|
if (hchmap->ops.chmap_validate) { |
|
err = hchmap->ops.chmap_validate(hchmap, ca, |
|
ARRAY_SIZE(chmap), chmap); |
|
if (err) |
|
return err; |
|
} |
|
|
|
hchmap->ops.set_chmap(hchmap->hdac, pcm_idx, chmap, prepared); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct hdac_chmap_ops chmap_ops = { |
|
.chmap_cea_alloc_validate_get_type = hdmi_chmap_cea_alloc_validate_get_type, |
|
.cea_alloc_to_tlv_chmap = hdmi_cea_alloc_to_tlv_chmap, |
|
.pin_get_slot_channel = hdmi_pin_get_slot_channel, |
|
.pin_set_slot_channel = hdmi_pin_set_slot_channel, |
|
.set_channel_count = hdmi_set_channel_count, |
|
}; |
|
|
|
void snd_hdac_register_chmap_ops(struct hdac_device *hdac, |
|
struct hdac_chmap *chmap) |
|
{ |
|
chmap->ops = chmap_ops; |
|
chmap->hdac = hdac; |
|
init_channel_allocations(); |
|
} |
|
EXPORT_SYMBOL_GPL(snd_hdac_register_chmap_ops); |
|
|
|
int snd_hdac_add_chmap_ctls(struct snd_pcm *pcm, int pcm_idx, |
|
struct hdac_chmap *hchmap) |
|
{ |
|
struct snd_pcm_chmap *chmap; |
|
struct snd_kcontrol *kctl; |
|
int err, i; |
|
|
|
err = snd_pcm_add_chmap_ctls(pcm, |
|
SNDRV_PCM_STREAM_PLAYBACK, |
|
NULL, 0, pcm_idx, &chmap); |
|
if (err < 0) |
|
return err; |
|
/* override handlers */ |
|
chmap->private_data = hchmap; |
|
kctl = chmap->kctl; |
|
for (i = 0; i < kctl->count; i++) |
|
kctl->vd[i].access |= SNDRV_CTL_ELEM_ACCESS_WRITE; |
|
kctl->info = hdmi_chmap_ctl_info; |
|
kctl->get = hdmi_chmap_ctl_get; |
|
kctl->put = hdmi_chmap_ctl_put; |
|
kctl->tlv.c = hdmi_chmap_ctl_tlv; |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(snd_hdac_add_chmap_ctls);
|
|
|