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-rw-r--r--target/linux/bcm27xx/patches-5.15/950-0569-drm-vc4-Only-add-gamma-properties-once.patch26
1 files changed, 26 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0569-drm-vc4-Only-add-gamma-properties-once.patch b/target/linux/bcm27xx/patches-5.15/950-0569-drm-vc4-Only-add-gamma-properties-once.patch
new file mode 100644
index 0000000000..0c7e76d463
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0569-drm-vc4-Only-add-gamma-properties-once.patch
@@ -0,0 +1,26 @@
+From 749ff7fb1f2382f19ed744a86e82211711187db2 Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Mon, 8 Nov 2021 18:25:49 +0000
+Subject: [PATCH] drm/vc4: Only add gamma properties once.
+
+Two calls were made to drm_crtc_enable_color_mgmt to add gamma
+and CTM, however they were both set to add the gamma properties,
+so they ended up added twice.
+
+Fixes: 766cc6b1f7fc "drm/vc4: Add CTM support"
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/gpu/drm/vc4/vc4_crtc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_crtc.c
++++ b/drivers/gpu/drm/vc4/vc4_crtc.c
+@@ -1196,7 +1196,7 @@ int vc4_crtc_init(struct drm_device *drm
+ /* We support CTM, but only for one CRTC at a time. It's therefore
+ * implemented as private driver state in vc4_kms, not here.
+ */
+- drm_crtc_enable_color_mgmt(crtc, 0, true, crtc->gamma_size);
++ drm_crtc_enable_color_mgmt(crtc, 0, true, 0);
+
+ /* Initialize the VC4 gamma LUTs */
+ for (i = 0; i < crtc->gamma_size; i++) {