[PATCH i-g-t 2/2] lib/igt_kms: add support for choosing big joiner mode

[Sharma, Swati2]

Hi Kunal,

On 15-Jan-24 4:28 PM, Kunal Joshi wrote:
> add support to choose big joiner mode with environment
> variable, use mode with highest clock if no mode with big joiner
> found.
> 
> v2: reuse bigjoiner_mode_found (Bhanu)
> v3: avoid returning from multiple places (Bhanu)
>      avoid frequent debugfs reads (Bhanu)
> 
> Cc: Karthik B S <karthik.b.s at intel.com>
> Cc: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
> Signed-off-by: Kunal Joshi <kunal1.joshi at intel.com>
> ---
>   lib/igt_kms.c | 24 +++++++++++++++++++-----
>   1 file changed, 19 insertions(+), 5 deletions(-)
> 
> diff --git a/lib/igt_kms.c b/lib/igt_kms.c
> index cb6d57c2d..2c4210d4b 100644
> --- a/lib/igt_kms.c
> +++ b/lib/igt_kms.c
> @@ -1771,8 +1771,9 @@ void igt_sort_connector_modes(drmModeConnector *connector,
>   bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
>   					drmModeModeInfo *mode)
>   {
> +	bool found;
>   	char *env;
> -	int i;
> +	int i, max_dotclock;
>   
>   	if (!connector->count_modes) {
>   		igt_warn("no modes for connector %d\n",
> @@ -1781,21 +1782,34 @@ bool kmstest_get_connector_default_mode(int drm_fd, drmModeConnector *connector,
>   	}
>   
>   	env = getenv("IGT_KMS_RESOLUTION");
> +	max_dotclock = igt_get_max_dotclock(drm_fd);
>   	if (env) {
>   		/*
> -		 * Only (0 or 1) and (lowest or highest) are allowed.
> +		 * Only (0 or 1 or 2) and (lowest or highest or joiner) are allowed.
>   		 *
>   		 * 0/lowest: Choose connector mode with lowest possible resolution.
>   		 * 1/highest: Choose connector mode with highest possible resolution.
> +		 * 2/joiner: Choose connector mode with bigjoiner support or with
> +			     highest clock if can't support  big joiner

Shouldn't this be only joiner mode?

>   		 */
> -		if (!strcmp(env, "highest") || !strcmp(env, "1"))
> +		if (!strcmp(env, "joiner") || !strcmp(env, "2"))
> +			found = bigjoiner_mode_found(drm_fd, connector,
> +						     sort_drm_modes_by_clk_dsc,mode,
> +						     max_dotclock) ||
> +				bigjoiner_mode_found(drm_fd, connector,
> +						     sort_drm_modes_by_res_dsc, mode,
> +						     max_dotclock) ||
> +				bigjoiner_mode_found(drm_fd, connector,
> +						     sort_drm_modes_by_clk_dsc, mode,
> +						     max_dotclock);
> +		else if (!strcmp(env, "highest") || !strcmp(env, "1"))
>   			igt_sort_connector_modes(connector, sort_drm_modes_by_res_dsc);
>   		else if (!strcmp(env, "lowest") || !strcmp(env, "0"))
>   			igt_sort_connector_modes(connector, sort_drm_modes_by_res_asc);
>   		else
>   			goto default_mode;
> -
> -		*mode = connector->modes[0];
> +		if (!found)
> +			*mode = connector->modes[0];
>   		return true;
>   	}
>