From: Dongjin Kim <tobetter@xxxxxxxxx>
Support YUV422 output from the Amlogic Meson SoC VPU to the HDMI
controller. Without this YUV422 format out of the HDMI encoder
leads to using the dw-hdmi YUV444 to YUV422 color conversion which
gives wrong colors and a green line on the left edge of the screen.
Signed-off-by: Dongjin Kim <tobetter@xxxxxxxxx>
Signed-off-by: Christian Hewitt <christianshewitt@xxxxxxxxx>
Tested-by: Furkan Kardame <f.kardame@xxxxxxxxxxx>
---
I've had this patch in my sources for some time now; originally picked
from Dongjin's mainline branches for Hardkernel boards and tweaked for
some minor renaming after DRM bridge changes were merged. Furkhan has
reminded me this is still needed a couple of days ago and now the same
issue is reported on the mailing list [0] so best to submit it. If a
fixes tag is required? please advise the commit and i'll resend.
drivers/gpu/drm/meson/meson_encoder_hdmi.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
index 5e306de6f485..08529efb4405 100644
--- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
@@ -218,7 +218,8 @@ static void meson_encoder_hdmi_atomic_enable(struct drm_bridge *bridge,
if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) {
ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
yuv420_mode = true;
- }
+ } else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
+ ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
/* VENC + VENC-DVI Mode setup */
meson_venc_hdmi_mode_set(priv, vic, ycrcb_map, yuv420_mode, mode);
@@ -230,6 +231,10 @@ static void meson_encoder_hdmi_atomic_enable(struct drm_bridge *bridge,
/* Setup YUV420 to HDMI-TX, no 10bit diphering */
writel_relaxed(2 | (2 << 2),
priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
+ else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
+ /* Setup YUV422 to HDMI-TX, no 10bit diphering */
+ writel_relaxed(1 | (2 << 2),
+ priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
else
/* Setup YUV444 to HDMI-TX, no 10bit diphering */
writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
@@ -257,6 +262,7 @@ static void meson_encoder_hdmi_atomic_disable(struct drm_bridge *bridge,
static const u32 meson_encoder_hdmi_out_bus_fmts[] = {
MEDIA_BUS_FMT_YUV8_1X24,
+ MEDIA_BUS_FMT_UYVY8_1X16,
MEDIA_BUS_FMT_UYYVYY8_0_5X24,
};
--
2.17.1
