[RFC PATCH 2/3] drm: Adjust atomic checks for solid fill color
Dmitry Baryshkov
dmitry.baryshkov at linaro.org
Sat Oct 29 11:38:27 UTC 2022
On 29/10/2022 01:59, Jessica Zhang wrote:
> Loosen the requirements for atomic and legacy commit so that, in cases
> where solid fill planes is enabled (and FB_ID is NULL), the commit can
> still go through.
>
> In addition, add framebuffer NULL checks in other areas to account for
> FB being NULL when solid fill is enabled.
>
> Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>
> ---
> drivers/gpu/drm/drm_atomic.c | 68 ++++++++++++++++-------------
> drivers/gpu/drm/drm_atomic_helper.c | 34 +++++++++------
> drivers/gpu/drm/drm_plane.c | 8 ++--
> include/drm/drm_atomic_helper.h | 5 ++-
> 4 files changed, 64 insertions(+), 51 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
> index f197f59f6d99..b576ed221431 100644
> --- a/drivers/gpu/drm/drm_atomic.c
> +++ b/drivers/gpu/drm/drm_atomic.c
> @@ -601,8 +601,10 @@ static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
> uint32_t num_clips;
> int ret;
>
> - /* either *both* CRTC and FB must be set, or neither */
> - if (crtc && !fb) {
> + /* When color_fill is disabled,
> + * either *both* CRTC and FB must be set, or neither
> + */
> + if (crtc && !fb && !new_plane_state->color_fill) {
Using !color_fill sounds bad. It would disallow using black as the plane
fill color. I think, you need to check color_fill_format instead.
> drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] CRTC set but no FB\n",
> plane->base.id, plane->name);
> return -EINVAL;
> @@ -626,14 +628,16 @@ static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
> }
Don't we need to check that the color_fill_format is supported too?
>
> /* Check whether this plane supports the fb pixel format. */
> - ret = drm_plane_check_pixel_format(plane, fb->format->format,
> - fb->modifier);
> - if (ret) {
> - drm_dbg_atomic(plane->dev,
> - "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",
> - plane->base.id, plane->name,
> - &fb->format->format, fb->modifier);
> - return ret;
> + if (fb) {
> + ret = drm_plane_check_pixel_format(plane, fb->format->format,
> + fb->modifier);
> +
> + if (ret)
> + drm_dbg_atomic(plane->dev,
> + "[PLANE:%d:%s] invalid pixel format %p4cc, modifier 0x%llx\n",
> + plane->base.id, plane->name,
> + &fb->format->format, fb->modifier);
> + return ret;
> }
>
> /* Give drivers some help against integer overflows */
> @@ -649,28 +653,30 @@ static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state,
> return -ERANGE;
> }
>
> - fb_width = fb->width << 16;
> - fb_height = fb->height << 16;
> + if (fb) {
> + fb_width = fb->width << 16;
> + fb_height = fb->height << 16;
>
> - /* Make sure source coordinates are inside the fb. */
> - if (new_plane_state->src_w > fb_width ||
> - new_plane_state->src_x > fb_width - new_plane_state->src_w ||
> - new_plane_state->src_h > fb_height ||
> - new_plane_state->src_y > fb_height - new_plane_state->src_h) {
> - drm_dbg_atomic(plane->dev,
> - "[PLANE:%d:%s] invalid source coordinates "
> - "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
> - plane->base.id, plane->name,
> - new_plane_state->src_w >> 16,
> - ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
> - new_plane_state->src_h >> 16,
> - ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
> - new_plane_state->src_x >> 16,
> - ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
> - new_plane_state->src_y >> 16,
> - ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
> - fb->width, fb->height);
> - return -ENOSPC;
> + /* Make sure source coordinates are inside the fb. */
> + if (new_plane_state->src_w > fb_width ||
> + new_plane_state->src_x > fb_width - new_plane_state->src_w ||
> + new_plane_state->src_h > fb_height ||
> + new_plane_state->src_y > fb_height - new_plane_state->src_h) {
> + drm_dbg_atomic(plane->dev,
> + "[PLANE:%d:%s] invalid source coordinates "
> + "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n",
> + plane->base.id, plane->name,
> + new_plane_state->src_w >> 16,
> + ((new_plane_state->src_w & 0xffff) * 15625) >> 10,
> + new_plane_state->src_h >> 16,
> + ((new_plane_state->src_h & 0xffff) * 15625) >> 10,
> + new_plane_state->src_x >> 16,
> + ((new_plane_state->src_x & 0xffff) * 15625) >> 10,
> + new_plane_state->src_y >> 16,
> + ((new_plane_state->src_y & 0xffff) * 15625) >> 10,
> + fb->width, fb->height);
> + return -ENOSPC;
> + }
> }
>
> clips = __drm_plane_get_damage_clips(new_plane_state);
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 8bf41aa24068..5a5ffa06b8bd 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -818,7 +818,7 @@ int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
> *src = drm_plane_state_src(plane_state);
> *dst = drm_plane_state_dest(plane_state);
>
> - if (!fb) {
> + if (!fb && !plane_state->color_fill) {
> plane_state->visible = false;
> return 0;
> }
> @@ -835,25 +835,31 @@ int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
> return -EINVAL;
> }
>
> - drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation);
> + if (fb) {
> + drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation);
>
> - /* Check scaling */
> - hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
> - vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);
> - if (hscale < 0 || vscale < 0) {
> - drm_dbg_kms(plane_state->plane->dev,
> - "Invalid scaling of plane\n");
> - drm_rect_debug_print("src: ", &plane_state->src, true);
> - drm_rect_debug_print("dst: ", &plane_state->dst, false);
> - return -ERANGE;
> + /* Check scaling */
> + hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
> + vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);
> +
> + if (hscale < 0 || vscale < 0) {
> + drm_dbg_kms(plane_state->plane->dev,
> + "Invalid scaling of plane\n");
> + drm_rect_debug_print("src: ", &plane_state->src, true);
> + drm_rect_debug_print("dst: ", &plane_state->dst, false);
> + return -ERANGE;
> + }
> }
>
> if (crtc_state->enable)
> drm_mode_get_hv_timing(&crtc_state->mode, &clip.x2, &clip.y2);
>
> - plane_state->visible = drm_rect_clip_scaled(src, dst, &clip);
> -
> - drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation);
> + if (fb) {
> + plane_state->visible = drm_rect_clip_scaled(src, dst, &clip);
> + drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation);
> + } else if (plane_state->color_fill) {
> + plane_state->visible = true;
> + }
>
> if (!plane_state->visible)
> /*
> diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> index 726f2f163c26..223b5ed93d3a 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -850,8 +850,8 @@ static int __setplane_internal(struct drm_plane *plane,
>
> WARN_ON(drm_drv_uses_atomic_modeset(plane->dev));
>
> - /* No fb means shut it down */
> - if (!fb) {
> + /* No fb and no color fill means shut it down */
> + if (!fb && (plane->state && !plane->state->color_fill)) {
I'd suggest abstracting this to a helper function, which can then be
used in drm_atomic_plane_check() too.
> plane->old_fb = plane->fb;
> ret = plane->funcs->disable_plane(plane, ctx);
> if (!ret) {
> @@ -902,8 +902,8 @@ static int __setplane_atomic(struct drm_plane *plane,
>
> WARN_ON(!drm_drv_uses_atomic_modeset(plane->dev));
>
> - /* No fb means shut it down */
> - if (!fb)
> + /* No fb and no color fill means shut it down */
> + if (!fb && (plane->state && !plane->state->color_fill))
> return plane->funcs->disable_plane(plane, ctx);
>
> /*
> diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
> index 2a0b17842402..aa7576f0879d 100644
> --- a/include/drm/drm_atomic_helper.h
> +++ b/include/drm/drm_atomic_helper.h
> @@ -219,8 +219,9 @@ drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
> * Anything else should be considered a bug in the atomic core, so we
> * gently warn about it.
> */
> - WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
> - (new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
> + WARN_ON(!new_plane_state->color_fill &&
> + ((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
> + (new_plane_state->crtc != NULL && new_plane_state->fb == NULL)));
Please fix the indentation.
>
> return old_plane_state->crtc && !new_plane_state->crtc;
> }
--
With best wishes
Dmitry
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