wireguard-linux/drivers/gpu/drm/amd/display/dc/link, branch stable

drm/amd/display: Ensure dtbclk is enabled

2026-08-06T13:58:19Z

[why] ensure dtbclk is enabled before hdmistreamclk_en pmfw could stop dtbclk on idle. driver needs to ensure dtbclk enabled is enabled before hdmistreamclk_en also disable debounce timer on dcn42. Reviewed-by: Chris Park Reviewed-by: Leo Chen Signed-off-by: Charlene Liu Signed-off-by: Roman Li Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Enable DCN6 sources compilation

2026-08-06T13:53:32Z

- Add hooks in various entry points to perform hw/sw init for DCN6 asic - Add dependent changes needed to enable DCN6 asic - Update the Makefiles so that DCN6 related newly added sources are compiled Signed-off-by: Aurabindo Pillai Signed-off-by: Roman Li Reviewed-by: Ivan Lipski Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Silence link_dpms I2C retimer failures

2026-07-28T23:17:33Z

Commit a4f01bf729b2 ("drm/amd/display: Refactor and fix link_dpms I2C") had also changed the "Set retimer failed" messages from DC_LOG_DEBUG() to DC_LOG_ERROR(). This unfortunately can create log spam. Change those back to DC_LOG_DEBUG() only. Fixes: a4f01bf729b2 ("drm/amd/display: Refactor and fix link_dpms I2C") Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5520 Signed-off-by: Alan Swanson Signed-off-by: Alex Deucher

drm/amd/display: Fix force FRL rate debug setting

2026-07-28T22:58:15Z

[Why & How] - force FRL rate debug bit was not correctly forcing requested FRL rate Reviewed-by: Chris Park Signed-off-by: Relja Vojvodic Signed-off-by: Fangzhi Zuo Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Split DPMS ON into parts

2026-07-28T22:33:26Z

[Why] Ongoing optimization efforts require splitting DPMS ON around enable_link, in order to enable running multiple sequences in parallel. [How] * Split link_set_dpms_on across enable_link * Add return value indicating whether the programming sequence succeeded and/or run to the end. Reviewed-by: Alvin Lee Signed-off-by: Dominik Kaszewski Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Fix DP LT failure logging

2026-07-28T22:32:25Z

[Why/How] The final DP LT failure meant to be logged as DC warning is skipped due to a break statement above. Move logging up to make sure we don't miss LT fail events. Reviewed-by: George Shen Signed-off-by: Ilya Bakoulin Signed-off-by: Wayne Lin Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: remove duplicate link_dp_panel_replay.h include

2026-07-15T13:15:43Z

link_dp_irq_handler.c includes "link_dp_panel_replay.h" twice. Drop the redundant second include; this is a non-functional cleanup flagged by scripts/checkincludes.pl. Fixes: 1e5cd4adfc54 ("drm/amd/display: move panel replay out from edp") Signed-off-by: Anas Khan Reviewed-by: George Zhang Signed-off-by: Alex Deucher

drm/amd/display: Fix VABC Init and OLED Support

2026-07-15T13:15:39Z

[Why] TCONs supporting VESA AUX Backlight does not always support VESA Smooth Brightness. Driver software needs to implement smooth brightness by periodically updating the brightness by small steps. Driver implementation is completed and verified on LCD panels but solution is missing for OLED panels. [How] Updated driver to include smooth brightness for OLED panels using VESA Aux Backlight. Revert original workaround for VABC on oled issue, as it is no longer needed. Add VABC backlight Initialization sequence from driver side. Add fix to remove conflict between FW and driver backlight programming for future ASIC. Enable VABC for all future asic revisions. Reviewed-by: Anthony Koo Reviewed-by: Dillon Varone Signed-off-by: Iswara Nagulendran Signed-off-by: George Zhang Signed-off-by: Alex Deucher

drm/amd/display: Add dp_skip_rbr flag for NUTMEG

2026-07-15T13:15:37Z

No functional changes. Just clean up a conceptual mismatch. Based on feedback on the NUTMEG code in DC, the preferred_link_setting is meant to force the DP link to a specific setting, meaning both the link rate and lane count should be locked to an exact value. What NUTMEG needs is a lower bound on the link rate, which is not the same concept. Implement this as a HW workaround flag instead. Suggested-by: Wenjing Liu Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher

drm/amd/display: Fix preferred link rate for NUTMEG

2026-07-15T13:15:37Z

When there is a preferred link rate setting, it needs to be applied to both the current and initial link rate. This was regressed by a "coding style" fix, which caused the current link rate to not respect the preferred value. This commit restores the functionality of NUTMEG, the DP bridge encoder found on old APUs such as Kaveri. Fixes: a62346043a89 ("drm/amd/display: Fix coding style issue") Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5465 Cc: Chuanyu Tseng Reviewed-by: Fangzhi Zuo Signed-off-by: Timur Kristóf Signed-off-by: Alex Deucher