kernel/linux.git/drivers/gpu/drm/amd/display/modules/inc, branch v6.18.21

drm/amd/display: Add HDCP policy control

2025-09-05T21:38:40+00:00

[Why] DM should be able to control HDCP retry limit via configurable parameter. [How] Expose a retry_limit parameter for controlling the maximum number of retries and lift the hardcode out to DM. Reviewed-by: Nicholas Kazlauskas Reviewed-by: Aric Cyr Signed-off-by: Oleh Kuzhylnyi Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: HDCP Locality check using DMUB Fused IO

2025-04-07T22:01:07+00:00

[Why] HDCP locality check has strict timing requirements, currently broken due to reliance on msleep which does not guarantee accuracy. The PR moves the write-poll-read sequence into DMUB using new generic Fused IO interface, where the timing accuracy is greatly improved. New flow is enabled using DCN resource capability bit (none for now), or using a debug flag. [How] * Extended mod_hdcp_config with new function for requesting DMUB to execute a sequence of fused I2C/AUX commands and synchronously wait until an outbox reply arrives or a timeout expires. * If the timeout expires, send an abort to DMUB. * Update HDCP to use the DMUB for locality check if supported. * Add DC_HDCP_LC_FORCE_FW_ENABLE and DC_HDCP_LC_ENABLE_SW_FALLBACK. * Make the first enable new flow regardless of resource capabilities. * Make the second enable fallback to old SW flow. * Clean up makefile source file listings for easier updates. Reviewed-by: Alvin Lee Signed-off-by: Dominik Kaszewski Signed-off-by: Roman Li Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Remove unused freesync functions

2025-02-13T02:03:02+00:00

mod_freesync_get_vmin_vmax() and mod_freesync_get_v_position() were added in 2017 by commit 72ada5f76939 ("drm/amd/display: FreeSync Auto Sweep Support") mod_freesync_is_valid_range() was added in 2018 by commit e80e94460841 ("drm/amd/display: add method to check for supported range") mod_freesync_get_settings() was added in 2018 by commit a3e1737ed61c ("drm/amd/display: Implement stats logging") and mod_freesync_calc_field_rate_from_timing() was added in 2020 by commit 49c70ece54b0 ("drm/amd/display: Change input parameter for set_drr") None of these have been used. Remove them. Signed-off-by: Dr. David Alan Gilbert Signed-off-by: Alex Deucher

drm/amd/display: Fix nanosec stat overflow

2024-02-22T15:26:15+00:00

[Why] Nanosec stats can overflow on long running systems potentially causing statistic logging issues. [How] Use 64bit types for nanosec stats to ensure no overflow. Reviewed-by: Rodrigo Siqueira Tested-by: Daniel Wheeler Signed-off-by: Aric Cyr Signed-off-by: Alex Deucher

drm/amd/display: Removing duplicate copyright text

2024-01-05T21:05:11+00:00

mod_freesync header file has duplicated copyright boilerplate. Drop the duplicate. Signed-off-by: Marcelo Mendes Spessoto Junior Signed-off-by: Alex Deucher

drm/amd/display: Clean up code warnings

2023-10-04T22:42:01+00:00

- Fix constness of string parameters - Fix zero-initialization of structs which cannot take a 0 literal as the first field, for example enums Reviewed-by: Dillon Varone Acked-by: Aurabindo Pillai Signed-off-by: Aric Cyr Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Updating Video Format Fall Back Policy.

2023-02-28T19:29:35+00:00

[WHY] Adding 1920x1080 as fail safe mode for Video Format Fall Back Policy. Reviewed-by: Jerry Zuo Acked-by: Qingqing Zhuo Signed-off-by: Jasdeep Dhillon Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Enable Freesync over PCon

2023-01-31T19:00:44+00:00

[why] Enable Freesync over PCon on Linux environment. [how] Adding Freesync over PCon support in amdgpu_dm - Read DPCD for Freesync over PCon capabilitiy - Add whitelist for compatible branch devices Reviewed-by: Chao-kai Wang Acked-by: Alex Hung Signed-off-by: Sung Joon Kim Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Enable AdaptiveSync in DC interface

2023-01-24T18:26:25+00:00

[why] Start enabling AdaptiveSync feature on Linux environment. [how] Adding AdaptiveSync support in DC layer - building AdaptiveSync info_packets - adjusting the v_startup parameter Reviewed-by: Harry Wentland Reviewed-by: Anthony Koo Acked-by: Alan Liu Signed-off-by: Sung Joon Kim Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Wrong colorimetry workaround

2022-10-27T18:45:14+00:00

[Why] For FreeSync HDR, native color space flag in AMD VSIF(BT.709) should be used when intepreting content and color space flag in VSC or AVI infoFrame should be ignored. However, it turned out some userspace application still use color flag in VSC or AVI infoFrame which is incorrect. [How] Transfer function is used when building the VSC and AVI infoFrame. Set colorimetry to BT.709 when all the following match: 1. Pixel format is YCbCr; 2. In FreeSync 2 HDR, color is COLOR_SPACE_2020_YCBCR; 3. Transfer function is TRANSFER_FUNC_GAMMA_22; Tested-by: Mark Broadworth Reviewed-by: Krunoslav Kovac Acked-by: Rodrigo Siqueira Signed-off-by: Ma Hanghong Signed-off-by: Alex Deucher