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    SubjectRe: build error: f7655d42fcee drm/edid: Add CTA-861-G modes with VIC >= 193
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    On 2/11/20 12:48 PM, Frank Rowand wrote:
    > 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

    I did not actually revert f7655d42fcee from 5.6-rc1. I checked out the commit
    before f7655d42fcee and was able to build the kernel. Then I checked out
    f7655d42fcee and the build failed in the same manner as at 5.6-rc1.

    Simply reverting f7655d42fcee at 5.6-rc1 does not result in a buildable
    kernel due to other related changes.

    -Frank

    >
    >
    > 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
    >

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