[PATCH i-g-t 11/39] lib/vkms: Test CRTC default values

[Louis Chauvet]

Le 18/02/2025 à 17:49, José Expósito a écrit :
> Add a helper to get the CRTC writeback status and test that the default
> value is set when a new CRTC is created.
> 
> Signed-off-by: José Expósito <jose.exposito89 at gmail.com>

Reviewed-by: Louis Chauvet <louis.chauvet at bootlin.com>

> ---
>   lib/igt_vkms.c             | 19 +++++++++++++++++++
>   lib/igt_vkms.h             |  1 +
>   tests/vkms/vkms_configfs.c | 20 ++++++++++++++++++++
>   3 files changed, 40 insertions(+)
> 
> diff --git a/lib/igt_vkms.c b/lib/igt_vkms.c
> index a7dad43e2..4021f9aea 100644
> --- a/lib/igt_vkms.c
> +++ b/lib/igt_vkms.c
> @@ -24,6 +24,7 @@
>   #define VKMS_ROOT_DIR_NAME		"vkms"
>   #define VKMS_FILE_ENABLED		"enabled"
>   #define VKMS_FILE_PLANE_TYPE		"type"
> +#define VKMS_FILE_CRTC_WRITEBACK	"writeback"
>   
>   enum vkms_pipeline_item {
>   	VKMS_PIPELINE_ITEM_PLANE,
> @@ -377,3 +378,21 @@ void igt_vkms_device_add_crtc(igt_vkms_t *dev, const char *name)
>   {
>   	add_pipeline_item(dev, VKMS_PIPELINE_ITEM_CRTC, name);
>   }
> +
> +/**
> + * igt_vkms_crtc_is_writeback_enabled:
> + * @dev: Device the CRTC belongs to
> + * @name: CRTC name
> + *
> + * Indicate whether a VKMS CRTC writeback connector is enabled or not.
> + */
> +bool igt_vkms_crtc_is_writeback_enabled(igt_vkms_t *dev, const char *name)
> +{
> +	char path[PATH_MAX];
> +
> +	snprintf(path, sizeof(path), "%s/%s/%s/%s", dev->path,
> +		 get_pipeline_item_dir_name(VKMS_PIPELINE_ITEM_CRTC), name,
> +		 VKMS_FILE_CRTC_WRITEBACK);
> +
> +	return read_bool(path);
> +}
> diff --git a/lib/igt_vkms.h b/lib/igt_vkms.h
> index 7f70f92d3..59f6a9775 100644
> --- a/lib/igt_vkms.h
> +++ b/lib/igt_vkms.h
> @@ -34,5 +34,6 @@ int igt_vkms_plane_get_type(igt_vkms_t *dev, const char *name);
>   void igt_vkms_plane_set_type(igt_vkms_t *dev, const char *name, int type);
>   
>   void igt_vkms_device_add_crtc(igt_vkms_t *dev, const char *name);
> +bool igt_vkms_crtc_is_writeback_enabled(igt_vkms_t *dev, const char *name);
>   
>   #endif /* __IGT_VKMS_H__ */
> diff --git a/tests/vkms/vkms_configfs.c b/tests/vkms/vkms_configfs.c
> index 398232c03..95779d336 100644
> --- a/tests/vkms/vkms_configfs.c
> +++ b/tests/vkms/vkms_configfs.c
> @@ -300,6 +300,25 @@ static void test_crtc_default_files(void)
>   	igt_vkms_device_destroy(dev);
>   }
>   
> +/**
> + * SUBTEST: crtc-default-values
> + * Description: Check that the default values for the CRTC are correct.
> + */
> +
> +static void test_crtc_default_values(void)
> +{
> +	igt_vkms_t *dev;
> +
> +	dev = igt_vkms_device_create(__func__);
> +	igt_assert(dev);
> +
> +	igt_vkms_device_add_crtc(dev, "crtc0");
> +
> +	igt_assert(!igt_vkms_crtc_is_writeback_enabled(dev, "crtc0"));
> +
> +	igt_vkms_device_destroy(dev);
> +}
> +
>   igt_main
>   {
>   	struct {
> @@ -313,6 +332,7 @@ igt_main
>   		{ "plane-default-values", test_plane_default_values },
>   		{ "plane-wrong-values", test_plane_wrong_values },
>   		{ "crtc-default-files", test_crtc_default_files },
> +		{ "crtc-default-values", test_crtc_default_values },
>   	};
>   
>   	igt_fixture {

-- 
Louis Chauvet, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com