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Revision d2e3fce9ddafe689c6f7cb355f23560637e30b9d authored by Ville Syrjälä on 10 November 2020, 21:04:47 UTC, committed by Rodrigo Vivi on 19 November 2020, 06:52:25 UTC 
drm/i915: Handle max_bpc==16
 
EDID can declare the maximum supported bpc up to 16,
and apparently there are displays that do so. Currently
we assume 12 bpc is tha max. Fix the assumption and
toss in a MISSING_CASE() for any other value we don't
expect to see.

This fixes modesets with a display with EDID max bpc > 12.
Previously any modeset would just silently fail on platforms
that didn't otherwise limit this via the max_bpc property.
In particular we don't add the max_bpc property to HDMI
ports on gmch platforms, and thus we would see the raw
max_bpc coming from the EDID.

I suppose we could already adjust this to also allow 16bpc,
but seeing as no current platform supports that there is
little point.

Cc: stable@vger.kernel.org
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2632
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201110210447.27454-1-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
(cherry picked from commit 2ca5a7b85b0c2b97ef08afbd7799b022e29f192e)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
1 parent b5462cc
Raw File
Kconfig 
config WARN_MISSING_DOCUMENTS

	bool "Warn if there's a missing documentation file"
	depends on COMPILE_TEST
	help
	   It is not uncommon that a document gets renamed.
	   This option makes the Kernel to check for missing dependencies,
	   warning when something is missing. Works only if the Kernel
	   is built from a git tree.

	   If unsure, select 'N'.

config WARN_ABI_ERRORS
	bool "Warn if there are errors at ABI files"
	depends on COMPILE_TEST
	help
	   The files under Documentation/ABI should follow what's
	   described at Documentation/ABI/README. Yet, as they're manually
	   written, it would be possible that some of those files would
	   have errors that would break them for being parsed by
	   scripts/get_abi.pl. Add a check to verify them.

	   If unsure, select 'N'.
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