linux-kernel - build error: f7655d42fcee drm/edid: Add CTA-861-G modes with VIC >= 193

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Message-ID: <4e918a35-dbcd-b2fd-1888-a86e7d448128@gmail.com>
Date:   Tue, 11 Feb 2020 12:48:23 -0600
From:   Frank Rowand <frowand.list@...il.com>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>
Subject: build error: f7655d42fcee drm/edid: Add CTA-861-G modes with VIC >=
 193

I am getting a kernel build error at version 5.6-rc1:

drivers/gpu/drm/drm_edid.c: In function 'cea_mode_alternate_timings':
drivers/gpu/drm/drm_edid.c:3275:2: error: call to '__compiletime_assert_3282' declared with attribute error: BUILD_BUG_ON failed: cea_mode_for_vic(8)->vtotal != 262 || cea_mode_for_vic(9)->vtotal != 262 || cea_mode_for_vic(12)->vtotal != 262 || cea_mode_for_vic(13)->vtotal != 262 || cea_mode_for_vic(23)->vtotal != 312 || cea_mode_for_vic(24)->vtotal != 312 || cea_mode_for_vic(27)->vtotal != 312 || cea_mode_for_vic(28)->vtotal != 312
make[4]: *** [drivers/gpu/drm/drm_edid.o] Error 1


Kernel configuration:
  make qcom_defconfig

  (arch/arm/configs/qcom_defconfig)


Compiler is arm-eabi-gcc 4.6.x


The build error goes away if I revert:

   f7655d42fcee drm/edid: Add CTA-861-G modes with VIC >= 193


The build error also goes away if I comment out the two lines added to cea_mode_for_vic():

 	if (vic >= 193 && vic < 193 + ARRAY_SIZE(edid_cea_modes_193))
 		return &edid_cea_modes_193[vic - 193];


-Frank