drm/msm/dpu: Add support for AR30 format

Commit da7716a2 ("drm/msm/dpu: Add support for XR30 format") enabled
support for the 10-bit XR30 color format but missed enabling support for the
corresponding per-pixel alpha-blending AR30 color format.

Declaring only XR30 but not AR30 color format support can trigger bugs in
userspace. KDE KWin compositor versions prior to 5.27.3 for example prefer
10-bit color formats, rendering a 1cm^2 black box around the cursor due to
missing per-pixel alpha-blending.
Signed-off-by: Leonard Lausen <leonard@lausen.nl>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Tested-by: Jessica Zhang <quic_jesszhan@quicinc.com> # Trogdor (sc7180)
Patchwork: https://patchwork.freedesktop.org/patch/527985/
Link: https://lore.kernel.org/r/6f33219dc848ccd7122bce6933338033aa18c33c@lausen.nlSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_formats.c

@@ -536,6 +536,16 @@ static const struct dpu_format dpu_format_map_ubwc[] = {
 		true, 4, DPU_FORMAT_FLAG_DX | DPU_FORMAT_FLAG_COMPRESSED,
 		DPU_FETCH_UBWC, 2, DPU_TILE_HEIGHT_UBWC),
 
+	/* XRGB2101010 and ARGB2101010 purposely have the same color
+	* ordering.  The hardware only supports ARGB2101010 UBWC
+	* natively.
+	*/
+	INTERLEAVED_RGB_FMT_TILED(ARGB2101010,
+		COLOR_8BIT, COLOR_8BIT, COLOR_8BIT, COLOR_8BIT,
+		C2_R_Cr, C0_G_Y, C1_B_Cb, C3_ALPHA, 4,
+		true, 4, DPU_FORMAT_FLAG_DX | DPU_FORMAT_FLAG_COMPRESSED,
+		DPU_FETCH_UBWC, 2, DPU_TILE_HEIGHT_UBWC),
+
 	PSEUDO_YUV_FMT_TILED(NV12,
 		0, COLOR_8BIT, COLOR_8BIT, COLOR_8BIT,
 		C1_B_Cb, C2_R_Cr,
@@ -591,6 +601,7 @@ static int _dpu_format_get_media_color_ubwc(const struct dpu_format *fmt)
 		{DRM_FORMAT_XBGR8888, COLOR_FMT_RGBA8888_UBWC},
 		{DRM_FORMAT_XRGB8888, COLOR_FMT_RGBA8888_UBWC},
 		{DRM_FORMAT_ABGR2101010, COLOR_FMT_RGBA1010102_UBWC},
+		{DRM_FORMAT_ARGB2101010, COLOR_FMT_RGBA1010102_UBWC},
 		{DRM_FORMAT_XRGB2101010, COLOR_FMT_RGBA1010102_UBWC},
 		{DRM_FORMAT_XBGR2101010, COLOR_FMT_RGBA1010102_UBWC},
 		{DRM_FORMAT_BGR565, COLOR_FMT_RGB565_UBWC},

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c

@@ -192,6 +192,7 @@ static const uint32_t plane_formats[] = {
 	DRM_FORMAT_RGBX8888,
 	DRM_FORMAT_BGRX8888,
 	DRM_FORMAT_XBGR8888,
+	DRM_FORMAT_ARGB2101010,
 	DRM_FORMAT_XRGB2101010,
 	DRM_FORMAT_RGB888,
 	DRM_FORMAT_BGR888,
@@ -221,6 +222,7 @@ static const uint32_t plane_formats_yuv[] = {
 	DRM_FORMAT_RGBA8888,
 	DRM_FORMAT_BGRX8888,
 	DRM_FORMAT_BGRA8888,
+	DRM_FORMAT_ARGB2101010,
 	DRM_FORMAT_XRGB2101010,
 	DRM_FORMAT_XRGB8888,
 	DRM_FORMAT_XBGR8888,

drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c

@@ -69,6 +69,7 @@ static const uint32_t qcom_compressed_supported_formats[] = {
 	DRM_FORMAT_ARGB8888,
 	DRM_FORMAT_XBGR8888,
 	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_ARGB2101010,
 	DRM_FORMAT_XRGB2101010,
 	DRM_FORMAT_BGR565,