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/*
* Copyright 2017-2019 NXP
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_atomic.h>
#include <drm/drm_gem_cma_helper.h>
#include <linux/dma-buf.h>
#include <linux/reservation.h>
#include "imx-drm.h"
#include "dcss-crtc.h"
static void dcss_drm_output_poll_changed(struct drm_device *drm)
{
struct imx_drm_device *imxdrm = drm->dev_private;
drm_fbdev_cma_hotplug_event(imxdrm->fbhelper);
}
static int dcss_drm_atomic_check(struct drm_device *drm,
struct drm_atomic_state *state)
{
int ret;
ret = drm_atomic_helper_check_modeset(drm, state);
if (ret)
return ret;
ret = drm_atomic_helper_check_planes(drm, state);
if (ret)
return ret;
/*
* Check modeset again in case crtc_state->mode_changed is
* updated in plane's ->atomic_check callback.
*/
return drm_atomic_helper_check_modeset(drm, state);
}
static void dcss_kms_setup_output_pipe(struct drm_atomic_state *state)
{
struct drm_crtc *crtc;
struct drm_connector *connector;
struct drm_connector_state *conn_state;
struct drm_display_info *di;
int i;
for_each_connector_in_state(state, connector, conn_state, i) {
if (!connector->state->best_encoder)
continue;
if (!connector->state->crtc->state->active ||
!drm_atomic_crtc_needs_modeset(connector->state->crtc->state))
continue;
crtc = connector->state->crtc;
di = &connector->display_info;
dcss_crtc_setup_opipe(crtc, connector, di->hdmi.colorimetry,
di->hdmi.hdr_panel_metadata.eotf,
HDMI_QUANTIZATION_RANGE_FULL);
}
}
struct dcss_drm_commit {
struct work_struct work;
struct drm_device *dev;
struct drm_atomic_state *state;
};
static void dcss_drm_atomic_commit_tail(struct dcss_drm_commit *commit)
{
struct drm_atomic_state *state = commit->state;
struct drm_device *dev = commit->dev;
struct imx_drm_device *imxdrm = dev->dev_private;
drm_atomic_helper_wait_for_fences(dev, state, false);
drm_atomic_helper_wait_for_dependencies(state);
drm_atomic_helper_commit_modeset_disables(dev, state);
dcss_kms_setup_output_pipe(state);
drm_atomic_helper_commit_modeset_enables(dev, state);
drm_atomic_helper_commit_planes(dev, state,
DRM_PLANE_COMMIT_ACTIVE_ONLY);
drm_atomic_helper_commit_hw_done(state);
drm_atomic_helper_wait_for_vblanks(dev, state);
drm_atomic_helper_cleanup_planes(dev, state);
drm_atomic_helper_commit_cleanup_done(state);
drm_atomic_state_put(state);
spin_lock(&imxdrm->commit.wait.lock);
imxdrm->commit.pending = false;
wake_up_all_locked(&imxdrm->commit.wait);
spin_unlock(&imxdrm->commit.wait.lock);
kfree(commit);
}
static void dcss_commit_work(struct work_struct *work)
{
struct dcss_drm_commit *commit = container_of(work,
struct dcss_drm_commit,
work);
dcss_drm_atomic_commit_tail(commit);
}
static int dcss_drm_atomic_commit(struct drm_device *dev,
struct drm_atomic_state *state,
bool nonblock)
{
int ret;
struct imx_drm_device *imxdrm = dev->dev_private;
struct dcss_drm_commit *commit;
if (state->async_update) {
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
return ret;
drm_atomic_helper_async_commit(dev, state);
drm_atomic_helper_cleanup_planes(dev, state);
return 0;
}
commit = kzalloc(sizeof(*commit), GFP_KERNEL);
if (!commit)
return -ENOMEM;
commit->dev = dev;
commit->state = state;
ret = drm_atomic_helper_setup_commit(state, nonblock);
if (ret)
goto err_free;
INIT_WORK(&commit->work, dcss_commit_work);
ret = drm_atomic_helper_prepare_planes(dev, state);
if (ret)
goto err_free;
if (!nonblock) {
ret = drm_atomic_helper_wait_for_fences(dev, state, true);
if (ret)
goto err;
}
spin_lock(&imxdrm->commit.wait.lock);
ret = wait_event_interruptible_locked(imxdrm->commit.wait,
!imxdrm->commit.pending);
if (ret == 0)
imxdrm->commit.pending = true;
spin_unlock(&imxdrm->commit.wait.lock);
if (ret)
goto err;
ret = drm_atomic_helper_swap_state(state, true);
if (ret)
goto err;
drm_atomic_state_get(state);
if (nonblock)
queue_work(imxdrm->dcss_nonblock_commit_wq, &commit->work);
else
dcss_drm_atomic_commit_tail(commit);
return 0;
err:
drm_atomic_helper_cleanup_planes(dev, state);
err_free:
kfree(commit);
return ret;
}
const struct drm_mode_config_funcs dcss_drm_mode_config_funcs = {
.fb_create = drm_fb_cma_create,
.output_poll_changed = dcss_drm_output_poll_changed,
.atomic_check = dcss_drm_atomic_check,
.atomic_commit = dcss_drm_atomic_commit,
};
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