Commit 736692c3 authored by Jocelyn Falempe's avatar Jocelyn Falempe Committed by Alex Deucher
Browse files

drm/amd/display: add DC drm_panic support 



Add support for the drm_panic module, which displays a pretty user
friendly message on the screen when a Linux kernel panic occurs.

It doesn't work yet on laptop panels, maybe due to PSR.

Adapted from Jocelyn's original patch to add DC drm_panic
support.

Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarJocelyn Falempe <jfalempe@redhat.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: Lu Yao <yaolu@kylinos.cn>
Cc: Jocelyn Falempe <jfalempe@redhat.com>
Cc: Harry Wentland <harry.wentland@amd.com>
parent 1ad5bdc2

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c

+29 −1
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 


#include <drm/drm_atomic_helper.h>

#include <drm/drm_blend.h>

#include "drm/drm_framebuffer.h"

#include <drm/drm_gem_atomic_helper.h>

#include <drm/drm_plane_helper.h>

#include <drm/drm_gem_framebuffer_helper.h>
@@ -1421,6 +1422,20 @@ static void amdgpu_dm_plane_atomic_async_update(struct drm_plane *plane, 
	amdgpu_dm_plane_handle_cursor_update(plane, old_state);

}



static void amdgpu_dm_plane_panic_flush(struct drm_plane *plane)

{

	struct dm_plane_state *dm_plane_state = to_dm_plane_state(plane->state);

	struct drm_framebuffer *fb = plane->state->fb;

	struct dc_plane_state *dc_plane_state;



	if (!dm_plane_state || !dm_plane_state->dc_state)

		return;



	dc_plane_state = dm_plane_state->dc_state;



	dc_plane_force_update_for_panic(dc_plane_state, fb->modifier ? true : false);

}



static const struct drm_plane_helper_funcs dm_plane_helper_funcs = {

	.prepare_fb = amdgpu_dm_plane_helper_prepare_fb,

	.cleanup_fb = amdgpu_dm_plane_helper_cleanup_fb,
@@ -1429,6 +1444,16 @@ static const struct drm_plane_helper_funcs dm_plane_helper_funcs = { 
	.atomic_async_update = amdgpu_dm_plane_atomic_async_update

};



static const struct drm_plane_helper_funcs dm_primary_plane_helper_funcs = {

	.prepare_fb = amdgpu_dm_plane_helper_prepare_fb,

	.cleanup_fb = amdgpu_dm_plane_helper_cleanup_fb,

	.atomic_check = amdgpu_dm_plane_atomic_check,

	.atomic_async_check = amdgpu_dm_plane_atomic_async_check,

	.atomic_async_update = amdgpu_dm_plane_atomic_async_update,

	.get_scanout_buffer = amdgpu_display_get_scanout_buffer,

	.panic_flush = amdgpu_dm_plane_panic_flush,

};



static void amdgpu_dm_plane_drm_plane_reset(struct drm_plane *plane)

{

	struct dm_plane_state *amdgpu_state = NULL;
@@ -1855,6 +1880,9 @@ int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm, 
	    plane->type != DRM_PLANE_TYPE_CURSOR)

		drm_plane_enable_fb_damage_clips(plane);



	if (plane->type == DRM_PLANE_TYPE_PRIMARY)

		drm_plane_helper_add(plane, &dm_primary_plane_helper_funcs);

	else

		drm_plane_helper_add(plane, &dm_plane_helper_funcs);



#ifdef AMD_PRIVATE_COLOR