[igt-dev] [PATCH i-g-t] [RFC] tests/kms_prime: Aligned pitch to 64 byte for Intel platforms

[Ville Syrjälä]

On Fri, May 28, 2021 at 10:04:03AM +0530, Vidya Srinivas wrote:
> For Intel platforms, pitch needs to be 64 byte aligned.
> Kernel code vgem_gem_dumb_create which is platform generic code
> doesnt do the alignment. This causes frame buffer creation to fail
> on Intel platforms where the pitch is not 64 byte aligned.
> 
> tests: test run on Intel platforms with panel resolution 1366x768
> 
> Signed-off-by: Vidya Srinivas <vidya.srinivas at intel.com>
> ---
>  tests/kms_prime.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/tests/kms_prime.c b/tests/kms_prime.c
> index 8cb2ca2a9dc3..fdc941fe8100 100644
> --- a/tests/kms_prime.c
> +++ b/tests/kms_prime.c
> @@ -51,6 +51,8 @@ static struct {
>  	{ .r = 1.0, .g = 0.0, .b = 0.0, .color = 0xffff0000 },
>  };
>  
> +bool check_platform;
> +
>  IGT_TEST_DESCRIPTION("Prime tests, focusing on KMS side");
>  
>  static bool has_prime_import(int fd)
> @@ -101,7 +103,7 @@ static void prepare_scratch(int exporter_fd, struct dumb_bo *scratch,
>  	scratch->bpp = 32;
>  
>  	scratch->handle = kmstest_dumb_create(exporter_fd,
> -			scratch->width,
> +			check_platform? ALIGN(scratch->width, 64): scratch->width,

The dumb_create ioctl already does this for us.

>  			scratch->height,
>  			scratch->bpp,
>  			&scratch->pitch,
> @@ -262,6 +264,7 @@ igt_main
>  
>  		/* ANY = anything that is not VGEM */
>  		first_fd = __drm_open_driver_another(0, DRIVER_ANY | DRIVER_VGEM);
> +		check_platform = is_i915_device(first_fd);
>  		igt_require(first_fd >= 0);
>  
>  		second_fd = __drm_open_driver_another(1, DRIVER_ANY | DRIVER_VGEM);
> -- 
> 2.7.4
> 
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-- 
Ville Syrjälä
Intel