Re: [PATCH igt 2/2] kms_frontbuffer_tracking: standardize the used FB sizes

[Daniel Vetter <daniel@ffwll.ch>]

On Wed, Dec 02, 2015 at 10:47:01AM -0200, Paulo Zanoni wrote:
> We want to make sure that both tiled and untiled buffers have the same
> size for the same width/height/format. This will allow better control
> over the failure paths exercised by our tests: when we try to flip
> from tiled to untiled, we'll be sure that we won't execute the error
> path that checks for buffer sizes.
> 
> v2: Use the new igt_calc_fb_size() instead of implementing our own
> size calculation (Daniel).
> 
> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
>  tests/kms_frontbuffer_tracking.c | 51 ++++++++++++++++++++++++++--------------
>  1 file changed, 34 insertions(+), 17 deletions(-)
> 
> diff --git a/tests/kms_frontbuffer_tracking.c b/tests/kms_frontbuffer_tracking.c
> index 81703ec..3db95d2 100644
> --- a/tests/kms_frontbuffer_tracking.c
> +++ b/tests/kms_frontbuffer_tracking.c
> @@ -479,10 +479,28 @@ static bool init_modeset_cached_params(void)
>  	return true;
>  }
>  
> +static int format_get_bpp(uint32_t format)

Ah, missed one: igt_drm_format_to_bpp please, and if it doesn't cover them all we
need to fix that asap.
-Daniel

> +{
> +	switch (format) {
> +	case DRM_FORMAT_RGB565:
> +		return 16;
> +	case DRM_FORMAT_XRGB8888:
> +	case DRM_FORMAT_ARGB8888:
> +	case DRM_FORMAT_ARGB2101010:
> +	case DRM_FORMAT_XRGB2101010:
> +		return 32;
> +	default:
> +		igt_assert(false);
> +	}
> +}
> +
>  static void create_fb(enum pixel_format pformat, int width, int height,
>  		      uint64_t tiling, int plane, struct igt_fb *fb)
>  {
>  	uint32_t format;
> +	unsigned int size, stride;
> +	int bpp;
> +	uint64_t tiling_for_size;
>  
>  	switch (pformat) {
>  	case FORMAT_RGB888:
> @@ -512,7 +530,21 @@ static void create_fb(enum pixel_format pformat, int width, int height,
>  		igt_assert(false);
>  	}
>  
> -	igt_create_fb(drm.fd, width, height, format, tiling, fb);
> +	/* We want all frontbuffers with the same width/height/format to have
> +	 * the same size regardless of tiling since we want to properly exercise
> +	 * the Kernel's specific tiling-checking code paths without accidentally
> +	 * hitting size-checking ones first. */
> +	bpp = format_get_bpp(format);
> +	if (plane == PLANE_CUR)
> +		tiling_for_size = LOCAL_DRM_FORMAT_MOD_NONE;
> +	else
> +		tiling_for_size = LOCAL_I915_FORMAT_MOD_X_TILED;
> +
> +	igt_calc_fb_size(drm.fd, width, height, bpp, tiling_for_size, &size,
> +			 &stride);
> +
> +	igt_create_fb_with_bo_size(drm.fd, width, height, format, tiling, fb,
> +				   size, stride);
>  }
>  
>  static uint32_t pick_color(struct igt_fb *fb, enum color ecolor)
> @@ -1094,21 +1126,6 @@ static void *busy_thread_func(void *data)
>  	pthread_exit(0);
>  }
>  
> -static int fb_get_bpp(struct igt_fb *fb)
> -{
> -	switch (fb->drm_format) {
> -	case DRM_FORMAT_RGB565:
> -		return 16;
> -	case DRM_FORMAT_XRGB8888:
> -	case DRM_FORMAT_ARGB8888:
> -	case DRM_FORMAT_ARGB2101010:
> -	case DRM_FORMAT_XRGB2101010:
> -		return 32;
> -	default:
> -		igt_assert(false);
> -	}
> -}
> -
>  static void start_busy_thread(struct igt_fb *fb)
>  {
>  	int rc;
> @@ -1121,7 +1138,7 @@ static void start_busy_thread(struct igt_fb *fb)
>  	busy_thread.width = fb->width;
>  	busy_thread.height = fb->height;
>  	busy_thread.color = pick_color(fb, COLOR_PRIM_BG);
> -	busy_thread.bpp = fb_get_bpp(fb);
> +	busy_thread.bpp = format_get_bpp(fb->drm_format);
>  
>  	rc = pthread_create(&busy_thread.thread, NULL, busy_thread_func, NULL);
>  	igt_assert_eq(rc, 0);
> -- 
> 2.6.2
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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