drm/ast: Use msleep instead of mdelay for edid read

The busy-waiting in `mdelay()` can cause CPU stalls and kernel timeouts
during boot.

Signed-off-by: Nirmoy Das <[email protected]>
Reviewed-by: Thomas Zimmermann <[email protected]>
Tested-by: Carol L Soto [email protected]<mailto:[email protected]>
Fixes: 594e9c0 ("drm/ast: Create the driver for ASPEED proprietory Display-Port")
Cc: KuoHsiang Chou <[email protected]>
Cc: Thomas Zimmermann <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: Jocelyn Falempe <[email protected]>
Cc: [email protected]
Cc: <[email protected]> # v5.19+
Signed-off-by: Thomas Zimmermann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: nirmoy

drivers/gpu/drm/ast/ast_dp.c

@@ -134,7 +134,7 @@ static int ast_astdp_read_edid_block(void *data, u8 *buf, unsigned int block, si
 			 * 3. The Delays are often longer a lot when system resume from S3/S4.
 			 */
 			if (j)
-				mdelay(j + 1);
+				msleep(j + 1);
 
 			/* Wait for EDID offset to show up in mirror register */
 			vgacrd7 = ast_get_index_reg(ast, AST_IO_VGACRI, 0xd7);