Ville Syrjälä 3092ef7774 drm/edid: Parse topology block for all DispID structure v1.x ... [ Upstream commit e0a200ab4b ] DisplayID spec v1.3 revision history notes do claim that the toplogy block was added in v1.3 so requiring structure v1.2 would seem correct, but there is at least one EDID in edid.tv with a topology block and structure v1.0. And there are also EDIDs with DisplayID structure v1.3 which seems to be totally incorrect as DisplayID spec v1.3 lists structure v1.2 as the only legal value. Unfortunately I couldn't find copies of DisplayID spec v1.0-v1.2 anywhere (even on vesa.org), so I'll have to go on empirical evidence alone. We used to parse the topology block on all v1.x structures until the check for structure v2.0 was added. Let's go back to doing that as the evidence does suggest that there are DisplayIDs in the wild that would miss out on the topology stuff otherwise. Also toss out DISPLAY_ID_STRUCTURE_VER_12 entirely as it doesn't appear we can really use it for anything. I *think* we could technically skip all the structure version checks as the block tags shouldn't conflict between v2.0 and v1.x. But no harm in having a bit of extra sanity checks I guess. So far I'm not aware of any user reported regressions from overly strict check, but I do know that it broke igt/kms_tiled_display's fake DisplayID as that one gets generated with structure v1.0. Cc: Jani Nikula <jani.nikula@intel.com> Cc: Dmitry Osipenko <dmitry.osipenko@collabora.com> Fixes: c5a486af9d ("drm/edid: parse Tiled Display Topology Data Block for DisplayID 2.0") Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240410180139.21352-1-ville.syrjala@linux.intel.com Acked-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-05-30 09:44:52 +02:00
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drm	drm/edid: Parse topology block for all DispID structure v1.x	2024-05-30 09:44:52 +02:00
host1x	gpu: host1x: Do not setup DMA for virtual devices	2024-04-08 16:52:58 +02:00
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