011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
29 lines
1.1 KiB
Diff
29 lines
1.1 KiB
Diff
From b66013edab6e2149beb55eb1021926fd7ea26da7 Mon Sep 17 00:00:00 2001
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From: Eric Anholt <eric@anholt.net>
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Date: Thu, 15 Sep 2016 17:52:17 +0100
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Subject: [PATCH] drm/vc4: Fix up the limited range RGB output commit.
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CEA mode #1 is the only one that doesn't do limited range, thus the
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strange pattern in other drivers.
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Signed-off-by: Eric Anholt <eric@anholt.net>
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---
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drivers/gpu/drm/vc4/vc4_hdmi.c | 7 +++++--
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1 file changed, 5 insertions(+), 2 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
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+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
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@@ -343,8 +343,11 @@ static void vc4_hdmi_encoder_mode_set(st
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csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
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VC4_HD_CSC_CTL_ORDER);
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- if (vc4_encoder->hdmi_monitor && drm_match_cea_mode(mode) != 0) {
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- /* Enable limited range RGB output. This matrix is:
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+ if (vc4_encoder->hdmi_monitor && drm_match_cea_mode(mode) > 1) {
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+ /* CEA VICs other than #1 requre limited range RGB
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+ * output. Apply a colorspace conversion to squash
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+ * 0-255 down to 16-235. The matrix here is:
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+ *
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* [ 0 0 0.8594 16]
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* [ 0 0.8594 0 16]
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* [ 0.8594 0 0 16]
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