Re: [igt-dev] [v6 i-g-t 07/14] tests/kms_atomic_transition: Fix mode selection for 2x tests

["Nautiyal, Ankit K" <ankit.k.nautiyal@intel.com>]

LGTM.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>

On 5/12/2021 10:35 PM, Bhanuprakash Modem wrote:
> This patch will find the connector/mode combination that fits
> into the bandwidth when more than one monitor is connected.
>
> Example:
>    When two monitors connected through MST, the second monitor
>    also tries to use the same mode. So two such modes may not
>    fit into the link bandwidth. So, iterate through connected
>    outputs & modes and find a combination of modes those fit
>    into the link BW.
>
> V2:
> * Fix commit message (Ankit)
>
> Cc: Imre Deak <imre.deak@intel.com>
> Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
> ---
>   tests/kms_atomic_transition.c | 18 +++++++++++++++++-
>   1 file changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/tests/kms_atomic_transition.c b/tests/kms_atomic_transition.c
> index be60940d7..d8085ef3b 100644
> --- a/tests/kms_atomic_transition.c
> +++ b/tests/kms_atomic_transition.c
> @@ -100,6 +100,7 @@ run_primary_test(data_t *data, enum pipe pipe, igt_output_t *output)
>   	igt_plane_set_fb(primary, NULL);
>   	igt_output_set_pipe(output, PIPE_NONE);
>   	igt_remove_fb(data->drm_fd, &fb);
> +	igt_display_commit2(&data->display, COMMIT_ATOMIC);
>   }
>   
>   static void *fence_inc_thread(void *arg)
> @@ -784,7 +785,7 @@ static void collect_crcs_mask(igt_pipe_crc_t **pipe_crcs, unsigned mask, igt_crc
>   static void run_modeset_tests(data_t *data, int howmany, bool nonblocking, bool fencing)
>   {
>   	struct igt_fb fbs[2];
> -	int i, j = 0;
> +	int i, j;
>   	unsigned iter_max;
>   	igt_pipe_crc_t *pipe_crcs[IGT_MAX_PIPES] = { 0 };
>   	igt_output_t *output;
> @@ -793,6 +794,8 @@ static void run_modeset_tests(data_t *data, int howmany, bool nonblocking, bool
>   	for (i = 0; i < data->display.n_outputs; i++)
>   		igt_output_set_pipe(&data->display.outputs[i], PIPE_NONE);
>   
> +retry:
> +	j = 0;
>   	for_each_connected_output(&data->display, output) {
>   		drmModeModeInfo *mode = igt_output_get_mode(output);
>   
> @@ -839,6 +842,19 @@ static void run_modeset_tests(data_t *data, int howmany, bool nonblocking, bool
>   
>   	iter_max = 1 << j;
>   
> +	if (igt_display_try_commit_atomic(&data->display,
> +				DRM_MODE_ATOMIC_TEST_ONLY |
> +				DRM_MODE_ATOMIC_ALLOW_MODESET,
> +				NULL) != 0) {
> +		igt_output_t *out;
> +		bool found = igt_override_all_active_output_modes_to_fit_bw(&data->display);
> +		igt_require_f(found, "No valid mode combo found.\n");
> +
> +		for_each_connected_output(&data->display, out)
> +			igt_output_set_pipe(out, PIPE_NONE);
> +
> +		goto retry;
> +	}
>   	igt_display_commit2(&data->display, COMMIT_ATOMIC);
>   
>   	for (i = 0; i < iter_max; i++) {
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