kernel/linux.git/drivers/gpu/drm/amd/display/dc/dml2_0, branch linux-7.0.y

drm/amd/display: fix math_mod() using arg1 instead of arg2

2026-05-17T15:16:30+00:00

commit 2b104fc31be0607c04188fadbd4a9fa5b50f3b99 upstream. [Why] math_mod() multiplied by arg1 instead of arg2, returning a wrong result for any non-trivial modulo operation. [How] Replace arg1 with arg2 in the subtraction term to correctly implement fmod(arg1, arg2). Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Reviewed-by: Dillon Varone Signed-off-by: Wenjing Liu Signed-off-by: Aurabindo Pillai Tested-by: Dan Wheeler Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

Revert "drm/amd/display: Add Handling for gfxversion DcGfxBase"

2026-02-19T17:16:11+00:00

This reverts commit 2e193f5b1b4f ("drm/amd/display: Add Handling for gfxversion DcGfxBase") Reason for revert: Cause some regressions Reviewed-by: Dillon Varone Signed-off-by: Nicholas Carbones Signed-off-by: Ray Wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Fix the incorrect type in dml_print

2026-02-12T20:16:17+00:00

[Why & How] soc->max_outstanding_reqs is a dml_uint_t, not a dml_float_t. Reviewed-by: Austin Zheng Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Hung Signed-off-by: Tom Chung Signed-off-by: Alex Deucher

drm/amd/display: Add Handling for gfxversion DcGfxBase

2026-02-03T21:43:36+00:00

[Why] There is no way to set tiling in dml in the case that gfxversion is DcGfxBase. [How] Where tiling is updated based on Gfx, add case for DcGfxBase and set tiling to dml2_sw_linear. Reviewed-by: Dillon Varone Signed-off-by: Nicholas Carbones Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Match expected data types

2026-02-03T21:43:08+00:00

[Why/How] Data types should match what is expected. Update/cast data accordingly. Also change ASSERT to use DML_ASSERT instead Reviewed-by: Dillon Varone Signed-off-by: Zheng Austin Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add lpddr5 handling to dml2.1

2026-02-03T21:39:15+00:00

[Why & How] Memory bandwidth calculations work differently than for ddr. Add lpddr5 handling. Reviewed-by: Charlene Liu Signed-off-by: Dmytro Laktyushkin Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Fix presentation of Z8 efficiency

2025-12-16T18:25:22+00:00

[Why/How] Should differentiate when vblank is or isn't included Reviewed-by: Dillon Varone Signed-off-by: Austin Zheng Signed-off-by: Chenyu Chen Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add use_max_lsw parameter

2025-12-16T18:25:17+00:00

[WHY&HOW] Add use_max_lsw parameter to make prefetch for linear surfaces similar to tiled. Reviewed-by: Dillon Varone Signed-off-by: Oleh Kuzhylnyi Signed-off-by: Chenyu Chen Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Additional info from DML for DMU

2025-12-08T19:23:13+00:00

[WHAT] Add additional info from DML for DMU when applicable on future platforms. Reviewed-by: Alvin Lee Signed-off-by: Nevenko Stupar Signed-off-by: Chenyu Chen Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Refactor dml_core_mode_support to reduce stack frame

2025-12-08T19:22:51+00:00

[WHAT] When compiling Linux kernel with clang, the following warning / error messages pops up: drivers/gpu/drm/amd/amdgpu/../dal-dev/dc/dml2_0/display_mode_core.c:6853:12: error: stack frame size (2120) exceeds limit (2056) in 'dml_core_mode_support' [-Werror,-Wframe-larger-than] 6853 | dml_bool_t dml_core_mode_support(struct display_mode_lib_st *mode_lib) [HOW] Refactoring CalculateVMRowAndSwath_params assignments to a new function helps reduce the stack frame size in dml_core_mode_support. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4733 Reviewed-by: Austin Zheng Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Hung Signed-off-by: Chenyu Chen Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher