This is a note to let you know that I've just added the patch titled
drm/amd/display: Fix calculation for cursor CAB allocation
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-fix-calculation-for-cursor-cab-alloc.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 697930fe9ee20c5a9162e17ed49fba6ad1319195
Author: George Shen <george.shen@xxxxxxx>
Date: Tue Nov 1 23:03:03 2022 -0400
drm/amd/display: Fix calculation for cursor CAB allocation
[ Upstream commit 4d285241230676ba8b888701b89684b4e0360fcc ]
[Why]
The cursor size (in memory) is currently incorrectly calculated,
resulting not enough CAB being allocated for static screen cursor
in MALL refresh. This results in cursor image corruption.
[How]
Use cursor pitch instead of cursor width when calculating cursor size.
Update num cache lines calculation to use the result of the cursor size
calculation instead of manually recalculating again.
Reviewed-by: Alvin Lee <Alvin.Lee2@xxxxxxx>
Acked-by: Tom Chung <chiahsuan.chung@xxxxxxx>
Signed-off-by: George Shen <george.shen@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 6.0.x
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
index 84a20ce9bd36..bbc0bfbec6c4 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
@@ -284,8 +284,7 @@ static uint32_t dcn32_calculate_cab_allocation(struct dc *dc, struct dc_state *c
using the max for calculation */
if (hubp->curs_attr.width > 0) {
- // Round cursor width to next multiple of 64
- cursor_size = (((hubp->curs_attr.width + 63) / 64) * 64) * hubp->curs_attr.height;
+ cursor_size = hubp->curs_attr.pitch * hubp->curs_attr.height;
switch (pipe->stream->cursor_attributes.color_format) {
case CURSOR_MODE_MONO:
@@ -310,9 +309,9 @@ static uint32_t dcn32_calculate_cab_allocation(struct dc *dc, struct dc_state *c
cursor_size > 16384) {
/* cursor_num_mblk = CEILING(num_cursors*cursor_width*cursor_width*cursor_Bpe/mblk_bytes, 1)
*/
- cache_lines_used += (((hubp->curs_attr.width * hubp->curs_attr.height * cursor_bpp +
- DCN3_2_MALL_MBLK_SIZE_BYTES - 1) / DCN3_2_MALL_MBLK_SIZE_BYTES) *
- DCN3_2_MALL_MBLK_SIZE_BYTES) / dc->caps.cache_line_size + 2;
+ cache_lines_used += (((cursor_size + DCN3_2_MALL_MBLK_SIZE_BYTES - 1) /
+ DCN3_2_MALL_MBLK_SIZE_BYTES) * DCN3_2_MALL_MBLK_SIZE_BYTES) /
+ dc->caps.cache_line_size + 2;
}
break;
}
@@ -730,10 +729,7 @@ void dcn32_update_mall_sel(struct dc *dc, struct dc_state *context)
struct hubp *hubp = pipe->plane_res.hubp;
if (pipe->stream && pipe->plane_state && hubp && hubp->funcs->hubp_update_mall_sel) {
- //Round cursor width up to next multiple of 64
- int cursor_width = ((hubp->curs_attr.width + 63) / 64) * 64;
- int cursor_height = hubp->curs_attr.height;
- int cursor_size = cursor_width * cursor_height;
+ int cursor_size = hubp->curs_attr.pitch * hubp->curs_attr.height;
switch (hubp->curs_attr.color_format) {
case CURSOR_MODE_MONO:
