[PATCH RFC 4/8] drm/sun4i: de2/de3: call csc setup also for UI layer

[Ryan Walklin]

From: Jernej Skrabec <jernej.skrabec at siol.net>

Currently, only VI layer calls CSC setup function. This comes from DE2
limitation, which doesn't have CSC unit for UI layers. However, DE3 has
separate CSC units for each layer. This allows display pipeline to make
output signal in different color spaces. To support both use cases, add
a call to CSC setup function also in UI layer code. For DE2, this will
be a no-op, but it will allow DE3 to output signal in multiple formats.

Signed-off-by: Jernej Skrabec <jernej.skrabec at gmail.com>
Co-developed-by: Ryan Walklin <ryan at testtoast.com>
Signed-off-by: Ryan Walklin <ryan at testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_csc.c      | 8 +++++---
 drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 6 ++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_csc.c b/drivers/gpu/drm/sun4i/sun8i_csc.c
index 0dcbc0866ae82..68d955c63b05b 100644
--- a/drivers/gpu/drm/sun4i/sun8i_csc.c
+++ b/drivers/gpu/drm/sun4i/sun8i_csc.c
@@ -209,8 +209,10 @@ void sun8i_csc_set_ccsc(struct sun8i_mixer *mixer, int layer,
 		return;
 	}
 
-	base = ccsc_base[mixer->cfg->ccsc][layer];
+	if (layer < mixer->cfg->vi_num) {
+		base = ccsc_base[mixer->cfg->ccsc][layer];
 
-	sun8i_csc_setup(mixer->engine.regs, base,
-			fmt_type, encoding, range);
+		sun8i_csc_setup(mixer->engine.regs, base,
+				fmt_type, encoding, range);
+	}
 }
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
index ca75ca0835a63..884abe3cf773a 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
@@ -20,6 +20,7 @@
 #include <drm/drm_gem_dma_helper.h>
 #include <drm/drm_probe_helper.h>
 
+#include "sun8i_csc.h"
 #include "sun8i_mixer.h"
 #include "sun8i_ui_layer.h"
 #include "sun8i_ui_scaler.h"
@@ -184,6 +185,11 @@ static int sun8i_ui_layer_update_formats(struct sun8i_mixer *mixer, int channel,
 			   SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch_base, overlay),
 			   SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_MASK, val);
 
+	/* Note: encoding and range arguments are ignored for RGB */
+	sun8i_csc_set_ccsc(mixer, channel, FORMAT_TYPE_RGB,
+			   DRM_COLOR_YCBCR_BT601,
+			   DRM_COLOR_YCBCR_FULL_RANGE);
+
 	return 0;
 }
 
-- 
2.45.2