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- 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]
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