From: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
YUV444 requires the matrix coefficients to be programmed in a different
way than the other formats. Let's add a function to program it properly.
Signed-off-by: Dave Stevenson <dave.stevenson@xxxxxxxxxxxxxxx>
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
---
drivers/gpu/drm/vc4/vc4_hdmi.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 299a8fe7a2ae..cb92d07680f0 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1259,6 +1259,20 @@ static void vc5_hdmi_set_csc_coeffs(struct vc4_hdmi *vc4_hdmi,
HDMI_WRITE(HDMI_CSC_34_33, (coeffs[2][3] << 16) | coeffs[2][2]);
}
+static void vc5_hdmi_set_csc_coeffs_swap(struct vc4_hdmi *vc4_hdmi,
+ const u16 coeffs[3][4])
+{
+ lockdep_assert_held(&vc4_hdmi->hw_lock);
+
+ /* YUV444 needs the CSC matrices using the channels in a different order */
+ HDMI_WRITE(HDMI_CSC_12_11, (coeffs[2][1] << 16) | coeffs[2][0]);
+ HDMI_WRITE(HDMI_CSC_14_13, (coeffs[2][3] << 16) | coeffs[2][2]);
+ HDMI_WRITE(HDMI_CSC_22_21, (coeffs[0][1] << 16) | coeffs[0][0]);
+ HDMI_WRITE(HDMI_CSC_24_23, (coeffs[0][3] << 16) | coeffs[0][2]);
+ HDMI_WRITE(HDMI_CSC_32_31, (coeffs[1][1] << 16) | coeffs[1][0]);
+ HDMI_WRITE(HDMI_CSC_34_33, (coeffs[1][3] << 16) | coeffs[1][2]);
+}
+
static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
struct drm_connector_state *state,
const struct drm_display_mode *mode)
@@ -1282,7 +1296,8 @@ static void vc5_hdmi_csc_setup(struct vc4_hdmi *vc4_hdmi,
switch (vc4_state->output_format) {
case VC4_HDMI_OUTPUT_YUV444:
- vc5_hdmi_set_csc_coeffs(vc4_hdmi, vc5_hdmi_csc_full_rgb_to_yuv_bt709[lim_range]);
+ vc5_hdmi_set_csc_coeffs_swap(vc4_hdmi,
+ vc5_hdmi_csc_full_rgb_to_yuv_bt709[lim_range]);
break;
case VC4_HDMI_OUTPUT_YUV422:
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