[igt-dev] [PATCH i-g-t 1/2] tests/kms_rotation_crc: fix crc buffer overflow for slow platforms

[Kahola, Mika]

> -----Original Message-----
> From: igt-dev <igt-dev-bounces at lists.freedesktop.org> On Behalf Of Juha-
> Pekka Heikkila
> Sent: Saturday, January 9, 2021 9:10 PM
> To: igt-dev at lists.freedesktop.org
> Subject: [igt-dev] [PATCH i-g-t 1/2] tests/kms_rotation_crc: fix crc buffer
> overflow for slow platforms
> 
> on bad tiling tests there was nothing reading running crcs which could fill up
> crc ringbuffer. Fix this by draining crc buffer per round. Also unify all
> platforms execution path by taking reference crcs per pipe.
> 
Looks ok to me.

Reviewed-by: Mika Kahola <mika.kahola at intel.com>

> Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
> ---
>  tests/kms_rotation_crc.c | 16 ++++++----------
>  1 file changed, 6 insertions(+), 10 deletions(-)
> 
> diff --git a/tests/kms_rotation_crc.c b/tests/kms_rotation_crc.c index
> be27103fa..33a97ccaa 100644
> --- a/tests/kms_rotation_crc.c
> +++ b/tests/kms_rotation_crc.c
> @@ -272,11 +272,7 @@ static void prepare_fbs(data_t *data, igt_output_t
> *output,
>  	 */
>  	igt_require(igt_display_has_format_mod(display, pixel_format,
> tiling));
> 
> -	/*
> -	 * HSW will need to have those CRCs calculated each time, it
> -	 * seems to behave different from other platforms.
> -	 */
> -	if (!data->crc_rect[rect].valid || IS_HASWELL(data->devid)) {
> +	if (!data->crc_rect[rect].valid) {
>  		/*
>  		* Create a reference software rotated flip framebuffer.
>  		*/
> @@ -345,6 +341,7 @@ static void test_single_case(data_t *data, enum pipe
> pipe,
> 
>  	ret = igt_display_try_commit2(display, COMMIT_ATOMIC);
>  	if (test_bad_format) {
> +		igt_pipe_crc_drain(data->pipe_crc);
>  		igt_assert_eq(ret, -EINVAL);
>  		return;
>  	}
> @@ -408,10 +405,6 @@ static void test_plane_rotation(data_t *data, int
> plane_type, bool test_bad_form
>  	igt_display_t *display = &data->display;
>  	igt_output_t *output;
>  	enum pipe pipe;
> -	int c;
> -
> -	for (c = 0; c < num_rectangle_types; c++)
> -		data->crc_rect[c].valid = false;
> 
>  	if (plane_type == DRM_PLANE_TYPE_CURSOR)
>  		igt_require(display->has_cursor_plane);
> @@ -420,7 +413,10 @@ static void test_plane_rotation(data_t *data, int
> plane_type, bool test_bad_form
> 
>  	for_each_pipe_with_valid_output(display, pipe, output) {
>  		igt_plane_t *plane;
> -		int i, j;
> +		int i, j, c;
> +
> +		for (c = 0; c < num_rectangle_types; c++)
> +			data->crc_rect[c].valid = false;
> 
>  		if (IS_CHERRYVIEW(data->devid) && pipe != PIPE_B)
>  			continue;
> --
> 2.28.0
> 
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