391 lines
10 KiB
C
391 lines
10 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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 <drm/drmP.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_fb_helper.h>
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#include <drm/drm_crtc_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_fb_cma_helper.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drm_of.h>
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#include <video/imx-ipu-v3.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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#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
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static int legacyfb_depth = 16;
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module_param(legacyfb_depth, int, 0444);
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#endif
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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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void imx_drm_encoder_destroy(struct drm_encoder *encoder)
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{
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drm_encoder_cleanup(encoder);
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}
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EXPORT_SYMBOL_GPL(imx_drm_encoder_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_modeset(dev, state);
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if (ret)
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return ret;
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ret = drm_atomic_helper_check_planes(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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.output_poll_changed = drm_fb_helper_output_poll_changed,
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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: this is the mask of outputs which can clone this output. */
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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 struct drm_driver imx_drm_driver = {
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.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
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DRIVER_ATOMIC,
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.lastclose = drm_fb_helper_lastclose,
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.gem_free_object_unlocked = drm_gem_cma_free_object,
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.gem_vm_ops = &drm_gem_cma_vm_ops,
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.dumb_create = drm_gem_cma_dumb_create,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_import = drm_gem_prime_import,
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.gem_prime_export = drm_gem_prime_export,
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.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
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.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
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.gem_prime_vmap = drm_gem_cma_prime_vmap,
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.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
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.gem_prime_mmap = drm_gem_cma_prime_mmap,
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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_cmp(np->name, "lvds-channel") == 0) {
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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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* enable drm irq mode.
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* - with irq_enabled = true, we can use the vblank feature.
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*
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* P.S. note that we wouldn't use drm irq handler but
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* just specific driver own one instead because
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* drm framework supports only one irq handler and
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* drivers can well take care of their interrupts
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*/
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drm->irq_enabled = true;
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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.allow_fb_modifiers = true;
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drm_mode_config_init(drm);
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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 IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
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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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ret = drm_fb_cma_fbdev_init(drm, legacyfb_depth, MAX_CRTC);
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if (ret)
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goto err_unbind;
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#endif
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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_fbhelper;
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return 0;
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err_fbhelper:
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drm_kms_helper_poll_fini(drm);
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#if IS_ENABLED(CONFIG_DRM_FBDEV_EMULATION)
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drm_fb_cma_fbdev_fini(drm);
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err_unbind:
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#endif
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component_unbind_all(drm->dev, drm);
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err_kms:
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drm_mode_config_cleanup(drm);
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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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drm_fb_cma_fbdev_fini(drm);
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drm_mode_config_cleanup(drm);
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component_unbind_all(drm->dev, drm);
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dev_set_drvdata(dev, NULL);
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drm_dev_put(drm);
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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 <s.hauer@pengutronix.de>");
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MODULE_DESCRIPTION("i.MX drm driver core");
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MODULE_LICENSE("GPL");
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