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drm/meson: add YUV422 output support

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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@gmail.com>
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Tested-by: Furkan Kardame <f.kardame@manjaro.org>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Dan Johansen <strit@manjaro.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220516072245.10745-1-christianshewitt@gmail.com
This commit is contained in:
Dongjin Kim 2022-05-16 07:22:45 +00:00 committed by Neil Armstrong
parent 7381076809
commit c193a003dc
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/meson/meson_encoder_hdmi.c
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@ -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,
};