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356 lines
8.5 KiB
356 lines
8.5 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Freescale i.MX drm driver |
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* |
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* Copyright (C) 2011 Sascha Hauer, Pengutronix |
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*/ |
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#include <linux/component.h> |
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#include <linux/device.h> |
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#include <linux/dma-buf.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <video/imx-ipu-v3.h> |
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#include <drm/drm_atomic.h> |
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#include <drm/drm_atomic_helper.h> |
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#include <drm/drm_drv.h> |
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#include <drm/drm_fb_cma_helper.h> |
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#include <drm/drm_fb_helper.h> |
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#include <drm/drm_gem_cma_helper.h> |
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#include <drm/drm_gem_framebuffer_helper.h> |
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#include <drm/drm_managed.h> |
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#include <drm/drm_of.h> |
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#include <drm/drm_plane_helper.h> |
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#include <drm/drm_probe_helper.h> |
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#include <drm/drm_vblank.h> |
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#include "imx-drm.h" |
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#include "ipuv3-plane.h" |
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#define MAX_CRTC 4 |
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static int legacyfb_depth = 16; |
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module_param(legacyfb_depth, int, 0444); |
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DEFINE_DRM_GEM_CMA_FOPS(imx_drm_driver_fops); |
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void imx_drm_connector_destroy(struct drm_connector *connector) |
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{ |
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drm_connector_unregister(connector); |
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drm_connector_cleanup(connector); |
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} |
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EXPORT_SYMBOL_GPL(imx_drm_connector_destroy); |
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static int imx_drm_atomic_check(struct drm_device *dev, |
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struct drm_atomic_state *state) |
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{ |
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int ret; |
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ret = drm_atomic_helper_check(dev, state); |
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if (ret) |
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return ret; |
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/* |
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* Check modeset again in case crtc_state->mode_changed is |
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* updated in plane's ->atomic_check callback. |
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*/ |
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ret = drm_atomic_helper_check_modeset(dev, state); |
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if (ret) |
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return ret; |
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/* Assign PRG/PRE channels and check if all constrains are satisfied. */ |
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ret = ipu_planes_assign_pre(dev, state); |
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if (ret) |
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return ret; |
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return ret; |
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} |
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static const struct drm_mode_config_funcs imx_drm_mode_config_funcs = { |
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.fb_create = drm_gem_fb_create, |
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.atomic_check = imx_drm_atomic_check, |
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.atomic_commit = drm_atomic_helper_commit, |
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}; |
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static void imx_drm_atomic_commit_tail(struct drm_atomic_state *state) |
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{ |
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struct drm_device *dev = state->dev; |
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struct drm_plane *plane; |
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struct drm_plane_state *old_plane_state, *new_plane_state; |
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bool plane_disabling = false; |
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int i; |
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drm_atomic_helper_commit_modeset_disables(dev, state); |
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drm_atomic_helper_commit_planes(dev, state, |
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DRM_PLANE_COMMIT_ACTIVE_ONLY | |
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DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET); |
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drm_atomic_helper_commit_modeset_enables(dev, state); |
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for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
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if (drm_atomic_plane_disabling(old_plane_state, new_plane_state)) |
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plane_disabling = true; |
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} |
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/* |
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* The flip done wait is only strictly required by imx-drm if a deferred |
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* plane disable is in-flight. As the core requires blocking commits |
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* to wait for the flip it is done here unconditionally. This keeps the |
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* workitem around a bit longer than required for the majority of |
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* non-blocking commits, but we accept that for the sake of simplicity. |
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*/ |
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drm_atomic_helper_wait_for_flip_done(dev, state); |
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if (plane_disabling) { |
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for_each_old_plane_in_state(state, plane, old_plane_state, i) |
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ipu_plane_disable_deferred(plane); |
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} |
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drm_atomic_helper_commit_hw_done(state); |
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} |
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static const struct drm_mode_config_helper_funcs imx_drm_mode_config_helpers = { |
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.atomic_commit_tail = imx_drm_atomic_commit_tail, |
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}; |
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int imx_drm_encoder_parse_of(struct drm_device *drm, |
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struct drm_encoder *encoder, struct device_node *np) |
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{ |
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uint32_t crtc_mask = drm_of_find_possible_crtcs(drm, np); |
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/* |
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* If we failed to find the CRTC(s) which this encoder is |
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* supposed to be connected to, it's because the CRTC has |
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* not been registered yet. Defer probing, and hope that |
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* the required CRTC is added later. |
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*/ |
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if (crtc_mask == 0) |
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return -EPROBE_DEFER; |
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encoder->possible_crtcs = crtc_mask; |
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/* FIXME: cloning support not clear, disable it all for now */ |
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encoder->possible_clones = 0; |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(imx_drm_encoder_parse_of); |
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static const struct drm_ioctl_desc imx_drm_ioctls[] = { |
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/* none so far */ |
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}; |
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static int imx_drm_dumb_create(struct drm_file *file_priv, |
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struct drm_device *drm, |
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struct drm_mode_create_dumb *args) |
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{ |
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u32 width = args->width; |
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int ret; |
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args->width = ALIGN(width, 8); |
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ret = drm_gem_cma_dumb_create(file_priv, drm, args); |
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if (ret) |
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return ret; |
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args->width = width; |
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return ret; |
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} |
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static const struct drm_driver imx_drm_driver = { |
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.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC, |
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DRM_GEM_CMA_DRIVER_OPS_WITH_DUMB_CREATE(imx_drm_dumb_create), |
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.ioctls = imx_drm_ioctls, |
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.num_ioctls = ARRAY_SIZE(imx_drm_ioctls), |
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.fops = &imx_drm_driver_fops, |
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.name = "imx-drm", |
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.desc = "i.MX DRM graphics", |
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.date = "20120507", |
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.major = 1, |
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.minor = 0, |
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.patchlevel = 0, |
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}; |
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static int compare_of(struct device *dev, void *data) |
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{ |
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struct device_node *np = data; |
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/* Special case for DI, dev->of_node may not be set yet */ |
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if (strcmp(dev->driver->name, "imx-ipuv3-crtc") == 0) { |
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struct ipu_client_platformdata *pdata = dev->platform_data; |
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return pdata->of_node == np; |
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} |
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/* Special case for LDB, one device for two channels */ |
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if (of_node_name_eq(np, "lvds-channel")) { |
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np = of_get_parent(np); |
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of_node_put(np); |
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} |
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return dev->of_node == np; |
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} |
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static int imx_drm_bind(struct device *dev) |
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{ |
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struct drm_device *drm; |
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int ret; |
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drm = drm_dev_alloc(&imx_drm_driver, dev); |
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if (IS_ERR(drm)) |
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return PTR_ERR(drm); |
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/* |
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* set max width and height as default value(4096x4096). |
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* this value would be used to check framebuffer size limitation |
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* at drm_mode_addfb(). |
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*/ |
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drm->mode_config.min_width = 1; |
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drm->mode_config.min_height = 1; |
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drm->mode_config.max_width = 4096; |
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drm->mode_config.max_height = 4096; |
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drm->mode_config.funcs = &imx_drm_mode_config_funcs; |
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drm->mode_config.helper_private = &imx_drm_mode_config_helpers; |
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drm->mode_config.normalize_zpos = true; |
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ret = drmm_mode_config_init(drm); |
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if (ret) |
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goto err_kms; |
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ret = drm_vblank_init(drm, MAX_CRTC); |
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if (ret) |
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goto err_kms; |
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dev_set_drvdata(dev, drm); |
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/* Now try and bind all our sub-components */ |
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ret = component_bind_all(dev, drm); |
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if (ret) |
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goto err_kms; |
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drm_mode_config_reset(drm); |
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/* |
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* All components are now initialised, so setup the fb helper. |
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* The fb helper takes copies of key hardware information, so the |
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* crtcs/connectors/encoders must not change after this point. |
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*/ |
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if (legacyfb_depth != 16 && legacyfb_depth != 32) { |
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dev_warn(dev, "Invalid legacyfb_depth. Defaulting to 16bpp\n"); |
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legacyfb_depth = 16; |
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} |
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drm_kms_helper_poll_init(drm); |
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ret = drm_dev_register(drm, 0); |
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if (ret) |
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goto err_poll_fini; |
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drm_fbdev_generic_setup(drm, legacyfb_depth); |
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return 0; |
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err_poll_fini: |
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drm_kms_helper_poll_fini(drm); |
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component_unbind_all(drm->dev, drm); |
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err_kms: |
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drm_dev_put(drm); |
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return ret; |
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} |
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static void imx_drm_unbind(struct device *dev) |
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{ |
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struct drm_device *drm = dev_get_drvdata(dev); |
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drm_dev_unregister(drm); |
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drm_kms_helper_poll_fini(drm); |
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component_unbind_all(drm->dev, drm); |
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drm_dev_put(drm); |
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dev_set_drvdata(dev, NULL); |
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} |
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static const struct component_master_ops imx_drm_ops = { |
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.bind = imx_drm_bind, |
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.unbind = imx_drm_unbind, |
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}; |
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static int imx_drm_platform_probe(struct platform_device *pdev) |
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{ |
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int ret = drm_of_component_probe(&pdev->dev, compare_of, &imx_drm_ops); |
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if (!ret) |
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ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); |
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return ret; |
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} |
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static int imx_drm_platform_remove(struct platform_device *pdev) |
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{ |
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component_master_del(&pdev->dev, &imx_drm_ops); |
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return 0; |
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} |
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#ifdef CONFIG_PM_SLEEP |
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static int imx_drm_suspend(struct device *dev) |
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{ |
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struct drm_device *drm_dev = dev_get_drvdata(dev); |
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return drm_mode_config_helper_suspend(drm_dev); |
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} |
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static int imx_drm_resume(struct device *dev) |
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{ |
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struct drm_device *drm_dev = dev_get_drvdata(dev); |
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return drm_mode_config_helper_resume(drm_dev); |
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} |
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#endif |
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static SIMPLE_DEV_PM_OPS(imx_drm_pm_ops, imx_drm_suspend, imx_drm_resume); |
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static const struct of_device_id imx_drm_dt_ids[] = { |
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{ .compatible = "fsl,imx-display-subsystem", }, |
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{ /* sentinel */ }, |
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}; |
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MODULE_DEVICE_TABLE(of, imx_drm_dt_ids); |
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static struct platform_driver imx_drm_pdrv = { |
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.probe = imx_drm_platform_probe, |
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.remove = imx_drm_platform_remove, |
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.driver = { |
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.name = "imx-drm", |
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.pm = &imx_drm_pm_ops, |
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.of_match_table = imx_drm_dt_ids, |
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}, |
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}; |
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static struct platform_driver * const drivers[] = { |
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&imx_drm_pdrv, |
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&ipu_drm_driver, |
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}; |
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static int __init imx_drm_init(void) |
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{ |
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return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
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} |
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module_init(imx_drm_init); |
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static void __exit imx_drm_exit(void) |
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{ |
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platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); |
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} |
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module_exit(imx_drm_exit); |
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MODULE_AUTHOR("Sascha Hauer <[email protected]>"); |
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MODULE_DESCRIPTION("i.MX drm driver core"); |
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MODULE_LICENSE("GPL");
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