linux-kernel - [PATCH] drm/meson: Add support for XBGR8888 & ABGR8888 formats

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Date:   Mon, 29 Apr 2019 09:52:38 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drm/meson: Add support for XBGR8888 & ABGR8888 formats

Add missing XBGR8888 & ABGR8888 formats variants from the primary plane.

Fixes: bbbe775ec5b5 ("drm: Add support for Amlogic Meson Graphic Controller")
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/gpu/drm/meson/meson_plane.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/gpu/drm/meson/meson_plane.c b/drivers/gpu/drm/meson/meson_plane.c
index bf8f1fab63aa..b8f6b08a89a6 100644
--- a/drivers/gpu/drm/meson/meson_plane.c
+++ b/drivers/gpu/drm/meson/meson_plane.c
@@ -165,6 +165,13 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
 		priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_32 |
 					      OSD_COLOR_MATRIX_32_ARGB;
 		break;
+	case DRM_FORMAT_XBGR8888:
+		/* For XRGB, replace the pixel's alpha by 0xFF */
+		writel_bits_relaxed(OSD_REPLACE_EN, OSD_REPLACE_EN,
+				    priv->io_base + _REG(VIU_OSD1_CTRL_STAT2));
+		priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_32 |
+					      OSD_COLOR_MATRIX_32_ABGR;
+		break;
 	case DRM_FORMAT_ARGB8888:
 		/* For ARGB, use the pixel's alpha */
 		writel_bits_relaxed(OSD_REPLACE_EN, 0,
@@ -172,6 +179,13 @@ static void meson_plane_atomic_update(struct drm_plane *plane,
 		priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_32 |
 					      OSD_COLOR_MATRIX_32_ARGB;
 		break;
+	case DRM_FORMAT_ABGR8888:
+		/* For ARGB, use the pixel's alpha */
+		writel_bits_relaxed(OSD_REPLACE_EN, 0,
+				    priv->io_base + _REG(VIU_OSD1_CTRL_STAT2));
+		priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_32 |
+					      OSD_COLOR_MATRIX_32_ABGR;
+		break;
 	case DRM_FORMAT_RGB888:
 		priv->viu.osd1_blk0_cfg[0] |= OSD_BLK_MODE_24 |
 					      OSD_COLOR_MATRIX_24_RGB;
@@ -356,7 +370,9 @@ static const struct drm_plane_funcs meson_plane_funcs = {
 
 static const uint32_t supported_drm_formats[] = {
 	DRM_FORMAT_ARGB8888,
+	DRM_FORMAT_ABGR8888,
 	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XBGR8888,
 	DRM_FORMAT_RGB888,
 	DRM_FORMAT_RGB565,
 };
-- 
2.21.0