Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 96ee739d authored by Ray Zhang's avatar Ray Zhang Committed by Gerrit - the friendly Code Review server
Browse files

disp: msm: add dirty fb support 



This is refactored from the upstream commit <b9fc5e01d>
("drm: Add helper to implement legacy dirtyfb").

The difference from the original commit is that full
screen update is always used to simplify the solution
no matter what the dirty region is, because msm-4.19
doesn't have fb_damage_clips support.

Change-Id: I0b534585321fde098d66cea0c51c7fc146218bd0
Signed-off-by: default avatarRay Zhang <rayz@codeaurora.org>
parent 532b2280

msm/msm_fb.c

+66 −1
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.

 * Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.

 * Copyright (C) 2013 Red Hat

 * Author: Rob Clark <robdclark@gmail.com>

 *
@@ -37,9 +37,74 @@ struct msm_framebuffer { 
};

#define to_msm_framebuffer(x) container_of(x, struct msm_framebuffer, base)



int msm_framebuffer_dirty(struct drm_framebuffer *fb,

		struct drm_file *file_priv, unsigned int flags,

		unsigned int color, struct drm_clip_rect *clips,

		unsigned int num_clips)

{

	struct drm_modeset_acquire_ctx ctx;

	struct drm_atomic_state *state;

	struct drm_plane *plane;

	int ret = 0;



	if (!num_clips || !clips)

		return 0;



	drm_modeset_acquire_init(&ctx,

			file_priv ? DRM_MODESET_ACQUIRE_INTERRUPTIBLE : 0);



	state = drm_atomic_state_alloc(fb->dev);

	if (!state) {

		ret = -ENOMEM;

		goto out_drop_locks;

	}

	state->acquire_ctx = &ctx;



retry:

	drm_for_each_plane(plane, fb->dev) {

		struct drm_plane_state *plane_state;



		ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx);

		if (ret)

			goto out;



		if (plane->state->fb != fb) {

			drm_modeset_unlock(&plane->mutex);

			continue;

		}



		plane_state = drm_atomic_get_plane_state(state, plane);

		if (IS_ERR(plane_state)) {

			ret = PTR_ERR(plane_state);

			goto out;

		}



		plane_state->visible = true;

	}



	ret = drm_atomic_commit(state);



out:

	if (ret == -EDEADLK) {

		drm_atomic_state_clear(state);

		ret = drm_modeset_backoff(&ctx);

		if (!ret)

			goto retry;

	}



	drm_atomic_state_put(state);



out_drop_locks:

	drm_modeset_drop_locks(&ctx);

	drm_modeset_acquire_fini(&ctx);



	return ret;

}



static const struct drm_framebuffer_funcs msm_framebuffer_funcs = {

	.create_handle = drm_gem_fb_create_handle,

	.destroy = drm_gem_fb_destroy,

	.dirty = msm_framebuffer_dirty,

};



#ifdef CONFIG_DEBUG_FS