linux.git/drivers/gpu/drm/amd/display/dc/dpp, branch v7.2 Linux kernel source tree drm/amd/display: Check for sharpening case when calculating max vtaps for scaler 2026-06-03T17:32:02+00:00 Samson Tam Samson.Tam@amd.com 2026-05-14T12:10:14+00:00 4d8cfd570386eb0b6cb8aa0ca9e9db60a0404337 [Why & How] - calc_lb_num_partitions has check when scaler is not enabled to use larger LB in calculations for max vtaps based on viewport being 1:1 - however, scaler is forced on when sharpening is enabled, so need to consider this in check - taps is predetermined in spl_get_optimal_number_of_taps prior to calc_lb_num_partitions. Add check for taps not 1 to handle sharpening case Reviewed-by: Charlene Liu <charlene.liu@amd.com> Signed-off-by: Samson Tam <Samson.Tam@amd.com> Signed-off-by: Ray Wu <ray.wu@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[Why & How]
- calc_lb_num_partitions has check when scaler is not enabled to use
 larger LB in calculations for max vtaps based on viewport being 1:1
- however, scaler is forced on when sharpening is enabled, so need
 to consider this in check
- taps is predetermined in spl_get_optimal_number_of_taps prior to
 calc_lb_num_partitions.  Add check for taps not 1 to handle
 sharpening case

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Signed-off-by: Ray Wu <ray.wu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Fix assertion due to disable/enable CM blocks 2026-05-19T15:45:40+00:00 Aric Cyr Aric.Cyr@amd.com 2026-05-05T20:27:29+00:00 2f28f0063a117d55dfa1672a1698cfe8fb2ee5c3 [why] Some dc state transitions can result in CM blocks being disabled, then re-enabled. The disable will set a defer bit, but re-enable will not clear it. When optimizing later, an assert will be hit due to incorrect expected HW state. [how] Clear defer bits if the block is re-enabled before optimization is executed. Reviewed-by: Alvin Lee <alvin.lee2@amd.com> Signed-off-by: Aric Cyr <Aric.Cyr@amd.com> Signed-off-by: Ivan Lipski <ivan.lipski@amd.com> Tested-by: Dan Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[why]
Some dc state transitions can result in CM blocks being disabled, then
re-enabled.  The disable will set a defer bit, but re-enable will not
clear it.  When optimizing later, an assert will be hit due to incorrect
expected HW state.

[how]
Clear defer bits if the block is re-enabled before optimization is
executed.

Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Aric Cyr <Aric.Cyr@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Fix warnings 2026-05-11T20:10:34+00:00 Clay King clayking@amd.com 2026-04-27T18:51:35+00:00 c3fb1fb9e65fa6a108b4d19c61bdcb47fd4fe180 [Why & How] Fix various warnings related to unsigned/signed mismatches - Consistently use the same signedness for a given value - Explcitly cast between types when needed Reviewed-by: Dillon Varone <dillon.varone@amd.com> Signed-off-by: Clay King <clayking@amd.com> Signed-off-by: James Lin <pinglei.lin@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[Why & How]
Fix various warnings related to unsigned/signed mismatches
-  Consistently use the same signedness for a given value
-  Explcitly cast between types when needed

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Clay King <clayking@amd.com>
Signed-off-by: James Lin <pinglei.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Fix type mismatches using guards and explicit casts 2026-05-05T13:56:52+00:00 Gaghik Khachatrian gaghik.khachatrian@amd.com 2026-04-21T16:24:09+00:00 64b4c4cdfddd31d3a0ec468afccb7ff7cd926682 [Why] Address signed/unsigned comparison warnings across dc paths to keep builds warning-clean and improve type safety at comparison boundaries. Most warnings came from signed loop/index temporaries compared against unsigned counters and table sizes, plus a smaller number of mixed signed/unsigned clock, bandwidth, and geometry comparisons. [How] Aligned iterator and temporary variable types with the semantic type of the compared bounds. Used unsigned indices for loops bounded by unsigned counters and table sizes, while retaining signed types where values are semantically signed or participate in arithmetic that may legitimately go negative. Where mixed signed/unsigned comparisons are intentional, applied explicit boundary casts or guarded comparisons instead of broad type changes. No functional behavior changes are intended; this is a warning-resolution and type-alignment cleanup. Reviewed-by: Dillon Varone <dillon.varone@amd.com> Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com> Signed-off-by: James Lin <pinglei.lin@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[Why]
Address signed/unsigned comparison warnings across dc paths to keep
builds warning-clean and improve type safety at comparison boundaries.
Most warnings came from signed loop/index temporaries compared against
unsigned counters and table sizes, plus a smaller number of mixed
signed/unsigned clock, bandwidth, and geometry comparisons.

[How]
Aligned iterator and temporary variable types with the semantic type
of the compared bounds. Used unsigned indices for loops bounded by unsigned
counters and table sizes, while retaining signed types where values are
semantically signed or participate in arithmetic that may legitimately go
negative. Where mixed signed/unsigned comparisons are intentional, applied
explicit boundary casts or guarded comparisons instead of broad type
changes.

No functional behavior changes are intended; this is a warning-resolution
and type-alignment cleanup.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com>
Signed-off-by: James Lin <pinglei.lin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: fix dual cursor shows on extend desktop 2026-04-28T18:27:26+00:00 Charlene Liu Charlene.Liu@amd.com 2026-04-11T02:29:37+00:00 df4c0441c41a1d3d5edcfec61c8e3be3513c412a [why & how] when dpp pipe power gating disabled in driver, disable_pipe did not disable cursor so next time as long as this pipe powers up, it will be visible. port dcn314 logic: disable cursor when it should be pipe pg. Reviewed-by: Roman Li <roman.li@amd.com> Signed-off-by: Charlene Liu <Charlene.Liu@amd.com> Signed-off-by: Tom Chung <chiahsuan.chung@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[why & how]
when dpp pipe power gating disabled in driver, disable_pipe
did not disable cursor so next time as long as this pipe
powers up, it will be visible.

port dcn314 logic: disable cursor when it should be pipe pg.

Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: bypass post csc for additional color spaces in dcn42 2026-04-17T19:41:15+00:00 Roman Li Roman.Li@amd.com 2026-04-13T21:32:55+00:00 35e86e6a54e82e3624e9abdad61c8d4b0f764396 [Why] This aligns dcn42 with: "drm/amd/display: bypass post csc for additional color spaces in dal" [How] Apply the same post csc bypass logic to dcn42 dpp using the helper function. Signed-off-by: Roman Li <roman.li@amd.com> Acked-by: Chenyu Chen <chen-yu.chen@amd.com> Reviewed-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[Why]
This aligns dcn42 with:
"drm/amd/display: bypass post csc for additional color spaces in dal"

[How]
Apply the same post csc bypass logic to dcn42 dpp using the
helper function.

Signed-off-by: Roman Li <roman.li@amd.com>
Acked-by: Chenyu Chen <chen-yu.chen@amd.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Remove unused NUM_ELEMENTS macros 2026-04-03T18:04:49+00:00 Linus Probert linus.probert@gmail.com 2026-04-03T08:22:07+00:00 a097dd7059cb1d4efb436092196885e3abd56518 Removes unused NUM_ELEMENTS macros. Discovered while removing cases where ARRAY_SIZE from the header <linus/array_size.h> can be used. This also aligns with the array_size.cocci coccinelle check. Suggested-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Linus Probert <linus.probert@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
Removes unused NUM_ELEMENTS macros. Discovered while removing cases
where ARRAY_SIZE from the header <linus/array_size.h> can be used.
This also aligns with the array_size.cocci coccinelle check.

Suggested-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Linus Probert <linus.probert@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Fixed Silence complier warnings in dc 2026-03-30T19:12:15+00:00 Gaghik Khachatrian gaghik.khachatrian@amd.com 2026-03-09T21:18:25+00:00 f82480fafedf622541276d48a3b4fed20ce5d866 [Why] Resolve compiler warnings by marking unused parameters explicitly. [How] In .c and .h function definitions, keep parameter names in signatures and add a line with `(void)param;` in function body Preserved function signatures and avoids breaking code paths that may reference the parameter under conditional compilation. Reviewed-by: Dillon Varone <dillon.varone@amd.com> Reviewed-by: Austin Zheng <austin.zheng@amd.com> Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com> Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[Why]
Resolve compiler warnings by marking unused parameters explicitly.

[How]
In .c and .h function definitions, keep parameter names
in signatures and add a line with `(void)param;` in function body

Preserved function signatures and avoids breaking code paths that
may reference the parameter under conditional compilation.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Reviewed-by: Austin Zheng <austin.zheng@amd.com>
Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com>
Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Rename enum 'pixel_format' to 'dc_pixel_format' 2026-03-23T18:19:14+00:00 Hou Wenlong houwenlong.hwl@antgroup.com 2026-03-16T03:46:29+00:00 d31ed58e2988d4a733242d6900920c9af39db8bb Rename the enum 'pixel_format' to 'dc_pixel_format' to avoid potential name conflicts with the pixel_format struct defined in include/video/pixel_format.h. Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com> Reviewed-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
Rename the enum 'pixel_format' to 'dc_pixel_format' to avoid potential
name conflicts with the pixel_format struct defined in
include/video/pixel_format.h.

Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Sync dcn42 with DC 3.2.373 2026-03-11T17:58:07+00:00 Roman Li Roman.Li@amd.com 2026-03-05T17:56:09+00:00 e56e3cff2a1bb29545ddbec562e76c0419363a40 This patch provides a bulk merge to align driver support for DCN42 with Display Core version 3.2.373. It includes upgrade for: - clk_mgr - dml2/dml21 - optc - hubp - mpc - optc - hwseq Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com> Signed-off-by: Roman Li <Roman.Li@amd.com> Signed-off-by: Alex Hung <alex.hung@amd.com> Tested-by: Dan Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
This patch provides a bulk merge to align driver
support for DCN42 with Display Core version 3.2.373.

It includes upgrade for:
- clk_mgr
- dml2/dml21
- optc
- hubp
- mpc
- optc
- hwseq

Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>