Wayne Lin 21daa13f7b drm/dp_mst: Fix drm RAD print ... [ Upstream commit 6bbce873a9c97cb12f5455c497be279ac58e707f ] [Why] The RAD of sideband message printed today is incorrect. For RAD stored within MST branch - If MST branch LCT is 1, it's RAD array is untouched and remained as 0. - If MST branch LCT is larger than 1, use nibble to store the up facing port number in cascaded sequence as illustrated below: u8 RAD[0] = (LCT_2_UFP << 4) | LCT_3_UFP RAD[1] = (LCT_4_UFP << 4) | LCT_5_UFP ... In drm_dp_mst_rad_to_str(), it wrongly to use BIT_MASK(4) to fetch the port number of one nibble. [How] Adjust the code by: - RAD array items are valuable only for LCT >= 1. - Use 0xF as the mask to replace BIT_MASK(4) V2: - Document how RAD is constructed (Imre) V3: - Adjust the comment for rad[] so kdoc formats it properly (Lyude) Fixes: 2f015ec6ea ("drm/dp_mst: Add sideband down request tracing + selftests") Cc: Imre Deak <imre.deak@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Harry Wentland <hwentlan@amd.com> Cc: Lyude Paul <lyude@redhat.com> Reviewed-by: Lyude Paul <lyude@redhat.com> Signed-off-by: Wayne Lin <Wayne.Lin@amd.com> Signed-off-by: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20250113091100.3314533-2-Wayne.Lin@amd.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-04-10 14:33:32 +02:00
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drm_display_helper_mod.c
drm_dp_aux_bus.c
drm_dp_aux_dev.c
drm_dp_cec.c	gpu: drm_dp_cec: fix broken CEC adapter properties check	2025-02-21 13:49:36 +01:00
drm_dp_dual_mode_helper.c	drm/display: Fix building with GCC 15	2024-12-14 19:54:40 +01:00
drm_dp_helper_internal.h
drm_dp_helper.c
drm_dp_mst_topology_internal.h
drm_dp_mst_topology.c	drm/dp_mst: Fix drm RAD print	2025-04-10 14:33:32 +02:00
drm_dsc_helper.c
drm_hdcp_helper.c
drm_hdmi_helper.c
drm_scdc_helper.c
Kconfig
Makefile