Patch "drm/tidss: Check for K2G in in dispc_softreset()" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/tidss: Check for K2G in in dispc_softreset()

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-tidss-check-for-k2g-in-in-dispc_softreset.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 2c0015f295fe3aedf551b4ad9c13d4d4fb570813
Author: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
Date:   Thu Nov 9 09:37:59 2023 +0200

    drm/tidss: Check for K2G in in dispc_softreset()
    
    [ Upstream commit 151825150cf9c2e9fb90763d35b9dff3783628ac ]
    
    K2G doesn't have softreset feature. Instead of having every caller of
    dispc_softreset() check for K2G, move the check into dispc_softreset(),
    and make dispc_softreset() return 0 in case of K2G.
    
    Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
    Reviewed-by: Aradhya Bhatia <a-bhatia1@xxxxxx>
    Link: https://lore.kernel.org/r/20231109-tidss-probe-v2-6-ac91b5ea35c0@xxxxxxxxxxxxxxxx
    Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxxxxxxxxxxxx>
    Stable-dep-of: bc288a927815 ("drm/tidss: Fix dss reset")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
index 9a29f5fa8453..2af623842cfb 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.c
+++ b/drivers/gpu/drm/tidss/tidss_dispc.c
@@ -2707,6 +2707,10 @@ static int dispc_softreset(struct dispc_device *dispc)
 	u32 val;
 	int ret = 0;
 
+	/* K2G display controller does not support soft reset */
+	if (dispc->feat->subrev == DISPC_K2G)
+		return 0;
+
 	/* Soft reset */
 	REG_FLD_MOD(dispc, DSS_SYSCONFIG, 1, 1, 1);
 	/* Wait for reset to complete */
@@ -2829,12 +2833,9 @@ int dispc_init(struct tidss_device *tidss)
 	of_property_read_u32(dispc->dev->of_node, "max-memory-bandwidth",
 			     &dispc->memory_bandwidth_limit);
 
-	/* K2G display controller does not support soft reset */
-	if (feat->subrev != DISPC_K2G) {
-		r = dispc_softreset(dispc);
-		if (r)
-			return r;
-	}
+	r = dispc_softreset(dispc);
+	if (r)
+		return r;
 
 	tidss->dispc = dispc;
 




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