From: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Date: Thu, 23 Apr 2026 14:21:20 +0000 (+0300)
Subject: drm: xlnx: zynqmp: Add support for Y8 and XYYY2101010
X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=ed920c2abb421ed137f9104daad7a2cadaeb1711;p=thirdparty%2Fkernel%2Flinux.git

drm: xlnx: zynqmp: Add support for Y8 and XYYY2101010

Add support for Y8 and XYYY2101010 formats. We also need to add new csc
matrices for these y-only formats.

Reviewed-by: Vishal Sagar <vishal.sagar@amd.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patch.msgid.link/20260423-xilinx-formats-v10-9-c690c2b8ea89@ideasonboard.com
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
---

diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
index 46ea70fd37ec..175ae1589018 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_disp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -307,6 +307,16 @@ static const struct zynqmp_disp_format avbuf_vid_fmts[] = {
 		.buf_fmt	= ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_10,
 		.swap		= false,
 		.sf		= scaling_factors_101010,
+	}, {
+		.drm_fmt	= DRM_FORMAT_Y8,
+		.buf_fmt	= ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MONO,
+		.swap		= false,
+		.sf		= scaling_factors_888,
+	}, {
+		.drm_fmt	= DRM_FORMAT_XYYY2101010,
+		.buf_fmt	= ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YONLY_10,
+		.swap		= false,
+		.sf		= scaling_factors_101010,
 	},
 };
 
@@ -697,6 +707,17 @@ static const u32 csc_sdtv_to_rgb_offsets[] = {
 	0x0, 0x1800, 0x1800
 };
 
+/* In Y-only mode the single Y channel is on the third column  */
+static const u16 csc_sdtv_to_rgb_yonly_matrix[] = {
+	0x0, 0x0, 0x1000,
+	0x0, 0x0, 0x1000,
+	0x0, 0x0, 0x1000,
+};
+
+static const u32 csc_sdtv_to_rgb_yonly_offsets[] = {
+	0x0, 0x0, 0x0
+};
+
 /**
  * zynqmp_disp_blend_set_output_format - Set the output format of the blender
  * @disp: Display controller
@@ -846,7 +867,11 @@ static void zynqmp_disp_blend_layer_enable(struct zynqmp_disp *disp,
 				ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(layer->id),
 				val);
 
-	if (layer->drm_fmt->is_yuv) {
+	if (layer->drm_fmt->format == DRM_FORMAT_Y8 ||
+	    layer->drm_fmt->format == DRM_FORMAT_XYYY2101010) {
+		coeffs = csc_sdtv_to_rgb_yonly_matrix;
+		offsets = csc_sdtv_to_rgb_yonly_offsets;
+	} else if (layer->drm_fmt->is_yuv) {
 		coeffs = csc_sdtv_to_rgb_matrix;
 		offsets = csc_sdtv_to_rgb_offsets;
 	} else {