linux-toradex.git/drivers/gpu/drm/amd/display/dc/hubbub, branch master Linux kernel for Apalis and Colibri modules drm/amd/display: Add DCN42B code to DC 2026-06-03T17:44:02+00:00 Matthew Stewart matthew.stewart2@amd.com 2026-05-18T19:00:50+00:00 0a5e0416e191571de9362b769feb31b3e87a705e [Why & How] Add DCN42B code to DC Reviewed-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Matthew Stewart <Matthew.Stewart2@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]
Add DCN42B code to DC

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Matthew Stewart <Matthew.Stewart2@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: Add ADDR3 swizzle modes 2026-05-19T15:45:41+00:00 Wenxian Wang wenxian.wang@amd.com 2026-05-09T02:46:23+00:00 468b02d3f212b5e528d8a40d06bf26e7f3fb4a64 [Why] New swizzle modes are needed for ADDR3 block support. [How] Add DC_ADDR3_SW_64KB_2D_Z and DC_ADDR3_SW_256KB_2D_Z enum values to dc_hw_types.h. Reviewed-by: Ilya Bakoulin <ilya.bakoulin@amd.com> Signed-off-by: Wenxian Wang <wenxian.wang@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]
New swizzle modes are needed for ADDR3 block support.

[How]
Add DC_ADDR3_SW_64KB_2D_Z and DC_ADDR3_SW_256KB_2D_Z enum
values to dc_hw_types.h.

Reviewed-by: Ilya Bakoulin <ilya.bakoulin@amd.com>
Signed-off-by: Wenxian Wang <wenxian.wang@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 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 implicit narrowing conversion warnings 2026-04-17T19:41:15+00:00 Gaghik Khachatrian gaghik.khachatrian@amd.com 2026-03-31T23:14:31+00:00 f4cdbb5d54057838b14a9b537309df24f20232c2 [Why] Multiple display source files contain implicit narrowing conversions when assigning wider integer types (int, uint32_t) to narrower fields (uint8_t, uint16_t) at hardware register, protocol, and storage boundaries. These conversions are intentional but undocumented, and accompanying runtime assertions add noise without providing compile-time safety. [How] Add explicit casts at all intentional narrowing boundaries across display source files. Use narrower loop variable types where loop bounds guarantee safe range. Remove runtime assertions paired with narrowing casts, inline single-use intermediate variables, and revert block scopes and braces introduced solely to contain those assertions. Reviewed-by: Dillon Varone <dillon.varone@amd.com> Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com> Signed-off-by: Chenyu Chen <chen-yu.chen@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[Why]
Multiple display source files contain implicit narrowing
conversions when assigning wider integer types (int, uint32_t)
to narrower fields (uint8_t, uint16_t) at hardware register,
protocol, and storage boundaries. These conversions are
intentional but undocumented, and accompanying runtime assertions
add noise without providing compile-time safety.

[How]
Add explicit casts at all intentional narrowing boundaries across
display source files. Use narrower loop variable types where loop
bounds guarantee safe range. Remove runtime assertions paired
with narrowing casts, inline single-use intermediate variables,
and revert block scopes and braces introduced solely to contain
those assertions.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Gaghik Khachatrian <gaghik.khachatrian@amd.com>
Signed-off-by: Chenyu Chen <chen-yu.chen@amd.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: remove disable_sutter touch pstate debug code 2026-03-23T18:15:18+00:00 Charlene Liu Charlene.Liu@amd.com 2026-03-10T17:33:55+00:00 3eb8ae187d35e75bbdcb5c4410b33a70ef6b1355 [why] diags is using disable_stutter, this will cause issue when pstate switch enabled Reviewed-by: Ilya Bakoulin <ilya.bakoulin@amd.com> Signed-off-by: Charlene Liu <Charlene.Liu@amd.com> Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[why]
diags is using disable_stutter, this will cause issue when pstate switch
enabled

Reviewed-by: Ilya Bakoulin <ilya.bakoulin@amd.com>
Signed-off-by: Charlene Liu <Charlene.Liu@amd.com>
Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Split arbiter programming for DCN42 2026-03-23T18:13:01+00:00 Nicholas Kazlauskas nicholas.kazlauskas@amd.com 2026-03-02T15:47:34+00:00 cb50faeb0d7585fed52231627d632462b9f927b0 [Why] We don't want to update the timeout threshold for stall recovery in firmware dynamically for DCN42 as we're not using FAMS. Firmware should own programming of this register since the recovery can be broken if driver updates the value to 0. [How] Split program_arbiter for dcn42 and skip the part that updates the timeout threshold. Reviewed-by: Leo Chen <leo.chen@amd.com> Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Signed-off-by: Roman Li <roman.li@amd.com> Signed-off-by: Chuanyu Tseng <Chuanyu.Tseng@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
[Why]
We don't want to update the timeout threshold for stall recovery in
firmware dynamically for DCN42 as we're not using FAMS.

Firmware should own programming of this register since the recovery
can be broken if driver updates the value to 0.

[How]
Split program_arbiter for dcn42 and skip the part that updates the
timeout threshold.

Reviewed-by: Leo Chen <leo.chen@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Signed-off-by: Chuanyu Tseng <Chuanyu.Tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Add missing dcn42 hubbub function pointers 2026-03-23T18:12:56+00:00 Roman Li Roman.Li@amd.com 2026-03-14T00:27:54+00:00 c446748aa3f233451955bf63ac9887047fe13e73 This aligning commit combines: - fix dcn42 det programming) - fix missing dcn42 pointers - fix SDPIF_Request_Rate_Limit programming value V2: Add back dchvm_init for DCN42 Reviewed-by: Alex Hung <alex.hung@amd.com> Reviewed-by: Leo Chen <leo.chen@amd.com> Signed-off-by: Roman Li <roman.li@amd.com> Signed-off-by: Chuanyu Tseng <Chuanyu.Tseng@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
This aligning commit combines:
- fix dcn42 det programming)
- fix missing dcn42 pointers
- fix SDPIF_Request_Rate_Limit programming value

V2: Add back dchvm_init for DCN42

Reviewed-by: Alex Hung <alex.hung@amd.com>
Reviewed-by: Leo Chen <leo.chen@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Signed-off-by: Chuanyu Tseng <Chuanyu.Tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drm/amd/display: Clean up unused code 2026-03-11T17:58:06+00:00 Clay King clayking@amd.com 2026-02-27T17:34:34+00:00 8c993dad415191e76169ca4b42eb00a8f8f7865a [WHAT] Silence warning by cleaning up unused code. Reviewed-by: Dillon Varone <dillon.varone@amd.com> Signed-off-by: Clay King <clayking@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> 
[WHAT]
Silence warning by cleaning up unused code.

Reviewed-by: Dillon Varone <dillon.varone@amd.com>
Signed-off-by: Clay King <clayking@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>
drm/amd/display: Enable dcn42 DC 2026-02-23T19:28:33+00:00 Roman Li Roman.Li@amd.com 2026-02-02T23:47:34+00:00 6b2dd7d37badd8bf076875397f9f39b494258ca7 Add support for DCN 4.2 in Display Core Signed-off-by: Roman Li <Roman.Li@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> 
Add support for DCN 4.2 in Display Core

Signed-off-by: Roman Li <Roman.Li@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>