[PATCH i-g-t] tests/amdgpu/amd_abm: Remove the modeset for ABM level setting

[Leo Li]

On 2024-08-26 04:25, Tom Chung wrote:
> [Why]
> Set the ABM level does not need to trigger the modeset to take effect.
> 
> [How]
> Replace the DPMS off -> on transition in set_abm_level() with
> atomic commit.
> 
> Signed-off-by: Tom Chung <chiahsuan.chung at amd.com>
Reviewed-by: Leo Li <sunpeng.li at amd.com>
Thanks!

> ---
>   tests/amdgpu/amd_abm.c | 99 ++++++++++++++++++++++++++++++------------
>   1 file changed, 71 insertions(+), 28 deletions(-)
> 
> diff --git a/tests/amdgpu/amd_abm.c b/tests/amdgpu/amd_abm.c
> index 2882c2c18..a85f444c4 100644
> --- a/tests/amdgpu/amd_abm.c
> +++ b/tests/amdgpu/amd_abm.c
> @@ -39,9 +39,75 @@
>   
>   typedef struct data {
>   	igt_display_t display;
> +	igt_plane_t *primary;
> +	igt_output_t *output;
> +	igt_pipe_t *pipe;
>   	int drm_fd;
> +	drmModeModeInfo *mode;
> +	enum pipe pipe_id;
> +	int w, h;
> +	igt_fb_t ref_fb;
>   } data_t;
>   
> +/* Common test setup. */
> +static void test_init(data_t *data)
> +{
> +	igt_display_t *display = &data->display;
> +	drmModeConnectorPtr conn;
> +	bool has_edp = false;
> +	int i;
> +
> +	/* Skip test if no eDP connected. */
> +	for (i = 0; i < display->n_outputs; i++) {
> +		conn = display->outputs[i].config.connector;
> +
> +		if (conn->connector_type == DRM_MODE_CONNECTOR_eDP &&
> +		    conn->connection == DRM_MODE_CONNECTED) {
> +			has_edp = true;
> +		}
> +	}
> +	if (!has_edp)
> +		igt_skip("No eDP connector found\n");
> +
> +	/* It doesn't matter which pipe we choose on amdpgu. */
> +	data->pipe_id = PIPE_A;
> +	data->pipe = &data->display.pipes[data->pipe_id];
> +
> +	igt_display_reset(display);
> +
> +	data->output = igt_get_single_output_for_pipe(display, data->pipe_id);
> +	igt_require(data->output);
> +	igt_info("output %s\n", data->output->name);
> +
> +	data->mode = igt_output_get_mode(data->output);
> +	igt_assert(data->mode);
> +	kmstest_dump_mode(data->mode);
> +
> +	data->primary =
> +		 igt_pipe_get_plane_type(data->pipe, DRM_PLANE_TYPE_PRIMARY);
> +
> +	igt_output_set_pipe(data->output, data->pipe_id);
> +
> +	data->w = data->mode->hdisplay;
> +	data->h = data->mode->vdisplay;
> +
> +	data->ref_fb.fb_id = 0;
> +
> +	igt_create_color_fb(data->drm_fd, data->mode->hdisplay,
> +		data->mode->vdisplay, DRM_FORMAT_XRGB8888, 0, 0.0, 0.6, 0.6, &data->ref_fb);
> +}
> +
> +/* Common test cleanup. */
> +static void test_fini(data_t *data)
> +{
> +	igt_display_t *display = &data->display;
> +
> +	igt_display_reset(display);
> +	igt_display_commit_atomic(display, DRM_MODE_ATOMIC_ALLOW_MODESET, 0);
> +
> +	if (data->ref_fb.fb_id)
> +		igt_remove_fb(data->drm_fd, &data->ref_fb);
> +}
>   
>   
>   static int read_current_backlight_pwm(int drm_fd, char *connector_name)
> @@ -121,14 +187,9 @@ static void set_abm_level(data_t *data, igt_output_t *output, int level)
>   
>   	igt_assert_eq(close(fd), 0);
>   
> -	/**
> -	 * We need to trigger a full modeset to have the new ABM level take effect.
> -	 * DPMS off -> on transition is one of many approaches.
> -	 */
> -	kmstest_set_connector_dpms(data->drm_fd, output->config.connector,
> -			 DRM_MODE_DPMS_OFF);
> -	kmstest_set_connector_dpms(data->drm_fd, output->config.connector,
> -			 DRM_MODE_DPMS_ON);
> +	igt_output_set_pipe(data->output, data->pipe_id);
> +	igt_plane_set_fb(data->primary, &data->ref_fb);
> +	igt_display_commit_atomic(&data->display, 0, 0);
>   }
>   
>   static int backlight_read_max_brightness(int *result)
> @@ -156,25 +217,6 @@ static int backlight_read_max_brightness(int *result)
>   	return errno;
>   }
>   
> -static void test_init(data_t *data)
> -{
> -	igt_display_t *display = &data->display;
> -	drmModeConnectorPtr conn;
> -	int i;
> -
> -	for (i = 0; i < display->n_outputs; i++) {
> -		conn = display->outputs[i].config.connector;
> -
> -		if (conn->connector_type == DRM_MODE_CONNECTOR_eDP &&
> -		    conn->connection == DRM_MODE_CONNECTED) {
> -			return;
> -		}
> -	}
> -
> -	igt_skip("No eDP connector found\n");
> -}
> -
> -
>   static void backlight_dpms_cycle(data_t *data)
>   {
>   	int ret;
> @@ -354,7 +396,7 @@ static void abm_gradual(data_t *data)
>   
>   igt_main
>   {
> -	data_t data = {};
> +	data_t data = {0};
>   	igt_skip_on_simulation();
>   
>   	igt_fixture {
> @@ -382,6 +424,7 @@ igt_main
>   		abm_gradual(&data);
>   
>   	igt_fixture {
> +		test_fini(&data);
>   		igt_display_fini(&data.display);
>   		drm_close_driver(data.drm_fd);
>   	}