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Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0513-drm-vc4-Fix-up-the-limited-range-RGB-output-commit.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0513-drm-vc4-Fix-up-the-limited-range-RGB-output-commit.patch29
1 files changed, 29 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0513-drm-vc4-Fix-up-the-limited-range-RGB-output-commit.patch b/target/linux/brcm2708/patches-4.4/0513-drm-vc4-Fix-up-the-limited-range-RGB-output-commit.patch
new file mode 100644
index 0000000000..09781b1ecd
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0513-drm-vc4-Fix-up-the-limited-range-RGB-output-commit.patch
@@ -0,0 +1,29 @@
+From b66013edab6e2149beb55eb1021926fd7ea26da7 Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Thu, 15 Sep 2016 17:52:17 +0100
+Subject: [PATCH] drm/vc4: Fix up the limited range RGB output commit.
+
+CEA mode #1 is the only one that doesn't do limited range, thus the
+strange pattern in other drivers.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/gpu/drm/vc4/vc4_hdmi.c | 7 +++++--
+ 1 file changed, 5 insertions(+), 2 deletions(-)
+
+--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
+@@ -343,8 +343,11 @@ static void vc4_hdmi_encoder_mode_set(st
+ csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
+ VC4_HD_CSC_CTL_ORDER);
+
+- if (vc4_encoder->hdmi_monitor && drm_match_cea_mode(mode) != 0) {
+- /* Enable limited range RGB output. This matrix is:
++ if (vc4_encoder->hdmi_monitor && drm_match_cea_mode(mode) > 1) {
++ /* CEA VICs other than #1 requre limited range RGB
++ * output. Apply a colorspace conversion to squash
++ * 0-255 down to 16-235. The matrix here is:
++ *
+ * [ 0 0 0.8594 16]
+ * [ 0 0.8594 0 16]
+ * [ 0.8594 0 0 16]