[igt-dev] [PATCH i-g-t v8 1/2] lib/dsc: Add helpers for VDSC output format debugfs entry

[Nautiyal, Ankit K]

LGTM

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

On 2/17/2023 11:01 PM, Swati Sharma wrote:
> Helper functions are added for VDSC output format debugfs entry.
>
> Signed-off-by: Swati Sharma <swati2.sharma at intel.com>
> Reviewed-by: Jouni Högander <jouni.hogander at intel.com>
> ---
>   lib/igt_dsc.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
>   lib/igt_dsc.h |  5 +++++
>   lib/igt_kms.h |  6 ++++++
>   3 files changed, 60 insertions(+)
>
> diff --git a/lib/igt_dsc.c b/lib/igt_dsc.c
> index 64dd6b29a..9e1ab9b11 100644
> --- a/lib/igt_dsc.c
> +++ b/lib/igt_dsc.c
> @@ -134,3 +134,52 @@ int igt_get_dsc_debugfs_fd(int drmfd, char *connector_name)
>   
>   	return openat(igt_debugfs_dir(drmfd), file_name, O_WRONLY);
>   }
> +
> +/*
> + * igt_is_dsc_output_format_supported_by_sink:
> + * @drmfd: A drm file descriptor
> + * @connector_name: Name of the libdrm connector we're going to use
> + * @output_format: Output format
> + *
> + * Returns: True if DSC output format is supported for the given connector,
> + * false otherwise.
> + */
> +bool igt_is_dsc_output_format_supported_by_sink(int drmfd, char *connector_name,
> +						enum dsc_output_format output_format)
> +{
> +	const char *check_str = "OUTPUTFORMATNOTFOUND";
> +
> +	switch (output_format) {
> +	case DSC_FORMAT_RGB:
> +		check_str = "RGB: yes";
> +		break;
> +	case DSC_FORMAT_YCBCR420:
> +		check_str = "YCBCR420: yes";
> +		break;
> +	case DSC_FORMAT_YCBCR444:
> +		check_str = "YCBCR444: yes";
> +		break;
> +	default:
> +		break;
> +	}
> +
> +	return check_dsc_debugfs(drmfd, connector_name, check_str);
> +}
> +
> +/*
> + * igt_force_dsc_output_format:
> + * @drmfd: A drm file descriptor
> + * @connector_name: Name of the libdrm connector we're going to use
> + * @output_format: Output format
> + *
> + * Returns: 0 on success or negative error code, in case of failure.
> + */
> +int igt_force_dsc_output_format(int drmfd, char *connector_name,
> +				enum dsc_output_format output_format)
> +{
> +	char buf[20] = {0};
> +
> +	sprintf(buf, "%d", output_format);
> +
> +	return write_dsc_debugfs(drmfd, connector_name, "i915_dsc_output_format", buf);
> +}
> diff --git a/lib/igt_dsc.h b/lib/igt_dsc.h
> index 291c2cdea..9608aad44 100644
> --- a/lib/igt_dsc.h
> +++ b/lib/igt_dsc.h
> @@ -7,6 +7,7 @@
>   #define IGT_DSC_H
>   
>   #include "igt_fb.h"
> +#include "igt_kms.h"
>   
>   bool igt_is_dsc_supported(int drmfd, char *connector_name);
>   bool igt_is_fec_supported(int drmfd, char *connector_name);
> @@ -15,5 +16,9 @@ bool igt_is_force_dsc_enabled(int drmfd, char *connector_name);
>   int igt_force_dsc_enable(int drmfd, char *connector_name);
>   int igt_force_dsc_enable_bpc(int drmfd, char *connector_name, int bpc);
>   int igt_get_dsc_debugfs_fd(int drmfd, char *connector_name);
> +bool igt_is_dsc_output_format_supported_by_sink(int drmfd, char *connector_name,
> +						enum dsc_output_format output_format);
> +int igt_force_dsc_output_format(int drmfd, char *connector_name,
> +				enum dsc_output_format output_format);
>   
>   #endif
> diff --git a/lib/igt_kms.h b/lib/igt_kms.h
> index be5482e08..52d144d27 100644
> --- a/lib/igt_kms.h
> +++ b/lib/igt_kms.h
> @@ -106,6 +106,12 @@ enum igt_custom_edid_type {
>    */
>   #define kmstest_port_name(port) ((port) + 'A')
>   
> +enum dsc_output_format {
> +	DSC_FORMAT_RGB = 0,
> +	DSC_FORMAT_YCBCR420,
> +	DSC_FORMAT_YCBCR444,
> +};
> +
>   const char *kmstest_encoder_type_str(int type);
>   const char *kmstest_connector_status_str(int status);
>   const char *kmstest_connector_type_str(int type);