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drm/amd/display: Restore full update for tiling change to linear

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[Why]
There was previously a dc debug flag to indicate that tiling
changes should only be a medium update instead of full. The
function get_plane_info_type was refactored to not rely on dc
state, but in the process the logic was unintentionally changed,
which leads to screen corruption in some cases.

[How]
 - add flag to tiling struct to avoid full update when necessary

Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Joshua Aberback 2026-03-12 18:33:49 -04:00 committed by Alex Deucher
parent 94cd4c4d71
commit 3967ab83a5
2 changed files with 9 additions and 21 deletions
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26
drivers/gpu/drm/amd/display/dc/core/dc.c
View File

@ -2769,28 +2769,12 @@ static struct surface_update_descriptor get_plane_info_update_type(const struct
if (memcmp(tiling, &u->surface->tiling_info, sizeof(*tiling)) != 0) {
update_flags->bits.swizzle_change = 1;
elevate_update_type(&update_type, UPDATE_TYPE_MED, LOCK_DESCRIPTOR_STREAM);
switch (tiling->gfxversion) {
case DcGfxVersion9:
case DcGfxVersion10:
case DcGfxVersion11:
if (tiling->gfx9.swizzle != DC_SW_LINEAR) {
update_flags->bits.bandwidth_change = 1;
elevate_update_type(&update_type, UPDATE_TYPE_FULL, LOCK_DESCRIPTOR_GLOBAL);
}
break;
case DcGfxAddr3:
if (tiling->gfx_addr3.swizzle != DC_ADDR3_SW_LINEAR) {
update_flags->bits.bandwidth_change = 1;
elevate_update_type(&update_type, UPDATE_TYPE_FULL, LOCK_DESCRIPTOR_GLOBAL);
}
break;
case DcGfxVersion7:
case DcGfxVersion8:
case DcGfxVersionUnknown:
default:
break;
if (tiling->flags.avoid_full_update_on_tiling_change) {
elevate_update_type(&update_type, UPDATE_TYPE_MED, LOCK_DESCRIPTOR_STREAM);
} else {
update_flags->bits.bandwidth_change = 1;
elevate_update_type(&update_type, UPDATE_TYPE_FULL, LOCK_DESCRIPTOR_GLOBAL);
}
}

4
drivers/gpu/drm/amd/display/dc/dc_hw_types.h
View File

@ -445,6 +445,10 @@ enum dc_gfxversion {
enum swizzle_mode_addr3_values swizzle;
} gfx_addr3;/*gfx with addr3 and above*/
};
struct {
bool avoid_full_update_on_tiling_change;
} flags;
};
/* Rotation angle */