Re: [PATCH i-g-t 2/2] tests/kms_plane: Skip unsupported modifiers

["Naladala, Ramanaidu" <Ramanaidu.naladala@intel.com>]

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Hi Santhosh,

On 2/4/2026 4:10 PM, Reddy Guddati, Santhosh wrote:
> Hi Pranay,
>
> On 04-02-2026 14:09, Pranay Samala wrote:
>> Skip modifier subtests that are not supported.
>>
>> Signed-off-by: Pranay Samala <pranay.samala@intel.com>
>> ---
>>   tests/kms_plane.c | 8 ++++++++
>>   1 file changed, 8 insertions(+)
>>
>> diff --git a/tests/kms_plane.c b/tests/kms_plane.c
>> index a7b1bf25d..69d06d627 100644
>> --- a/tests/kms_plane.c
>> +++ b/tests/kms_plane.c
>> @@ -1495,6 +1495,10 @@ run_tests_for_pipe_plane(data_t *data)
>>       for (int i = 0; i < ARRAY_SIZE(modifiers); i++) {
>>           igt_describe("verify the pixel formats for given plane and 
>> pipe");
>>           igt_subtest_with_dynamic_f("pixel-format-%s-modifier", 
>> modifiers[i].str) {
>> + igt_require_f(igt_display_has_format_mod(&data->display,
>> +                                 DRM_FORMAT_XRGB8888,
>> +                                 modifiers[i].modifier),
>> +                                 "Modifier not supported\n");
>
> This looks to be a redundant check here , as the same is handled in 
> test_format_plane.
Both checks must stay. The cursor plane only supports linear formats, so 
without the modifier check, |test_format_plane()| would incorrectly pass 
non‑linear modifiers, causing false positives.
>
> igt_skip_on_f(!found,
>               "Modifier " IGT_MODIFIER_FMT " not supported on plane 
> %d\n",
>               IGT_MODIFIER_ARGS(data->mod), plane->index);
>
> Thanks,
> Santhosh
>
>>               data->mod = modifiers[i].modifier;
>>               run_test(data, test_pixel_formats);
>>           }
>> @@ -1504,6 +1508,10 @@ run_tests_for_pipe_plane(data_t *data)
>>           igt_describe("verify the pixel formats for given plane and 
>> pipe with source clamping");
>> igt_subtest_with_dynamic_f("pixel-format-%s-modifier-source-clamping",
>>                          modifiers[i].str) {
>> + igt_require_f(igt_display_has_format_mod(&data->display,
>> +                                 DRM_FORMAT_XRGB8888,
>> +                                 modifiers[i].modifier),
>> +                                 "Modifier not supported\n");
>>               data->mod = modifiers[i].modifier;
>>               data->crop = 4;
>>               run_test(data, test_pixel_formats);
>
Thanks,
Ramanaidu N.

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