Commit a2d6f86b authored by Harish Chegondi's avatar Harish Chegondi Committed by Ashutosh Dixit
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drm/xe/topology: Add a function to find the index of the last enabled DSS in a mask 



Last enabled DSS in a DSS mask can help estimate the maximum DSSes enabled
in the DSS mask, as the enabled DSSes can be discontiguous.

Reviewed-by: default avatarAshutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: default avatarHarish Chegondi <harish.chegondi@intel.com>
Signed-off-by: default avatarAshutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/79944bb27eb4f7ce5df01f964aebbf431b3a6c61.1740533885.git.harish.chegondi@intel.com
parent 1a7460a1

drivers/gpu/drm/xe/xe_gt_topology.h

+13 −0
Original line number Diff line number Diff line
@@ -25,6 +25,19 @@ void xe_gt_topology_init(struct xe_gt *gt); 


void xe_gt_topology_dump(struct xe_gt *gt, struct drm_printer *p);



/**

 * xe_gt_topology_mask_last_dss() - Returns the index of the last DSS in a mask.

 * @mask: Input DSS mask

 *

 * Return: Index of the last DSS in the input DSS mask,

 *	   XE_MAX_DSS_FUSE_BITS if DSS mask is empty.

 */

static inline unsigned int

xe_gt_topology_mask_last_dss(const xe_dss_mask_t mask)

{

	return find_last_bit(mask, XE_MAX_DSS_FUSE_BITS);

}



unsigned int

xe_dss_mask_group_ffs(const xe_dss_mask_t mask, int groupsize, int groupnum);