From aa2036a9c766de4381efc65232571268be89e4f7 Mon Sep 17 00:00:00 2001 From: jsg Date: Wed, 26 Jul 2023 06:37:05 +0000 Subject: [PATCH] drm/amd/display: Add monitor specific edid quirk From Aurabindo Pillai 8404d0e274ac1f780e29fa6380ad4e2f9c4bd3da in linux-6.1.y/6.1.40 613a7956deb3b1ffa2810c6d4c90ee9c3d743dbb in mainline linux --- .../amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 26 +++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index e321531502b..9933a30cc69 100644 --- a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -42,6 +42,30 @@ #include "dm_helpers.h" #include "ddc_service_types.h" +static u32 edid_extract_panel_id(struct edid *edid) +{ + return (u32)edid->mfg_id[0] << 24 | + (u32)edid->mfg_id[1] << 16 | + (u32)EDID_PRODUCT_ID(edid); +} + +static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps) +{ + uint32_t panel_id = edid_extract_panel_id(edid); + + switch (panel_id) { + /* Workaround for some monitors which does not work well with FAMS */ + case drm_edid_encode_panel_id('S', 'A', 'M', 0x0E5E): + case drm_edid_encode_panel_id('S', 'A', 'M', 0x7053): + case drm_edid_encode_panel_id('S', 'A', 'M', 0x71AC): + DRM_DEBUG_DRIVER("Disabling FAMS on monitor with panel id %X\n", panel_id); + edid_caps->panel_patch.disable_fams = true; + break; + default: + return; + } +} + /* dm_helpers_parse_edid_caps * * Parse edid caps @@ -113,6 +137,8 @@ enum dc_edid_status dm_helpers_parse_edid_caps( else edid_caps->speaker_flags = DEFAULT_SPEAKER_LOCATION; + apply_edid_quirks(edid_buf, edid_caps); + kfree(sads); kfree(sadb); -- 2.20.1