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drm/imx: Add drm_panic support

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Add support for the drm_panic module, which displays a user-friendly
message to the screen when a kernel panic occurs.

v7:
 * use drm_panic_gem_get_scanout_buffer() helper

v8:
 * Replace get_scanout_buffer() logic with drm_panic_set_buffer()

v9:
 * Revert to using get_scanout_buffer() (Sima)
 * move get_scanout_buffer() to plane helper functions

v12:
 * Rename drm_panic_gem_get_scanout_buffer to drm_fb_dma_get_scanout_buffer
 (Thomas Zimmermann)

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-9-jfalempe@redhat.com
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jocelyn Falempe 2024-04-09 18:30:47 +02:00
parent 7e64f7c83c
commit 99b6251945
1 changed files with 11 additions and 1 deletions
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12
drivers/gpu/drm/imx/ipuv3/ipuv3-plane.c
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@ -773,6 +773,13 @@ static const struct drm_plane_helper_funcs ipu_plane_helper_funcs = {
.atomic_update = ipu_plane_atomic_update,
};
static const struct drm_plane_helper_funcs ipu_primary_plane_helper_funcs = {
.atomic_check = ipu_plane_atomic_check,
.atomic_disable = ipu_plane_atomic_disable,
.atomic_update = ipu_plane_atomic_update,
.get_scanout_buffer = drm_fb_dma_get_scanout_buffer,
};
bool ipu_plane_atomic_update_pending(struct drm_plane *plane)
{
struct ipu_plane *ipu_plane = to_ipu_plane(plane);
@ -916,7 +923,10 @@ struct ipu_plane *ipu_plane_init(struct drm_device *dev, struct ipu_soc *ipu,
ipu_plane->dma = dma;
ipu_plane->dp_flow = dp;
drm_plane_helper_add(&ipu_plane->base, &ipu_plane_helper_funcs);
if (type == DRM_PLANE_TYPE_PRIMARY)
drm_plane_helper_add(&ipu_plane->base, &ipu_primary_plane_helper_funcs);
else
drm_plane_helper_add(&ipu_plane->base, &ipu_plane_helper_funcs);
if (dp == IPU_DP_FLOW_SYNC_BG || dp == IPU_DP_FLOW_SYNC_FG)
ret = drm_plane_create_zpos_property(&ipu_plane->base, zpos, 0,