drm/xe/xe2: Modify main memory to ccs memory ratio.

On xe2 platforms each byte of CCS data now represents 512 bytes of
main memory data.

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/regs/xe_gpu_commands.h

@@ -16,7 +16,7 @@
 #define   XY_CTRL_SURF_MOCS_MASK	GENMASK(31, 26)
 #define   XE2_XY_CTRL_SURF_MOCS_INDEX_MASK	GENMASK(31, 28)
 #define   NUM_CCS_BYTES_PER_BLOCK	256
-#define   NUM_BYTES_PER_CCS_BYTE	256
+#define   NUM_BYTES_PER_CCS_BYTE(_xe)	(GRAPHICS_VER(_xe) >= 20 ? 512 : 256)
 #define   NUM_CCS_BLKS_PER_XFER		1024
 
 #define XY_FAST_COLOR_BLT_CMD		(2 << 29 | 0x44 << 22)

drivers/gpu/drm/xe/xe_device.c

@@ -615,7 +615,7 @@ void xe_device_wmb(struct xe_device *xe)
 u32 xe_device_ccs_bytes(struct xe_device *xe, u64 size)
 {
 	return xe_device_has_flat_ccs(xe) ?
-		DIV_ROUND_UP(size, NUM_BYTES_PER_CCS_BYTE) : 0;
+		DIV_ROUND_UP(size, NUM_BYTES_PER_CCS_BYTE(xe)) : 0;
 }
 
 bool xe_device_mem_access_ongoing(struct xe_device *xe)