gpu: ipu-v3: add support for ARGB4444 16-bit color format

This patch adds support for the ARGB4444 color format.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

2 files changed, 12 insertions, 0 deletions

diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index c0b19160a946..ba47b30d28fa 100644
--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -65,6 +65,7 @@ enum ipu_color_space ipu_drm_fourcc_to_colorspace(u32 drm_fourcc)
         case DRM_FORMAT_BGR565:
         case DRM_FORMAT_RGB888:
         case DRM_FORMAT_BGR888:
+        case DRM_FORMAT_ARGB4444:
         case DRM_FORMAT_XRGB8888:
         case DRM_FORMAT_XBGR8888:
         case DRM_FORMAT_RGBX8888:
diff --git a/drivers/gpu/ipu-v3/ipu-cpmem.c b/drivers/gpu/ipu-v3/ipu-cpmem.c
index 0e6b8687c61a..63eb16bf2cf0 100644
--- a/drivers/gpu/ipu-v3/ipu-cpmem.c
+++ b/drivers/gpu/ipu-v3/ipu-cpmem.c
@@ -524,6 +524,14 @@ static const struct ipu_rgb def_argb_16 = {
         .bits_per_pixel = 16,
 };
 
+static const struct ipu_rgb def_argb_16_4444 = {
+        .red    = { .offset =  8, .length = 4, },
+        .green  = { .offset =  4, .length = 4, },
+        .blue   = { .offset =  0, .length = 4, },
+        .transp = { .offset = 12, .length = 4, },
+        .bits_per_pixel = 16,
+};
+
 static const struct ipu_rgb def_abgr_16 = {
         .red    = { .offset =  0, .length = 5, },
         .green  = { .offset =  5, .length = 5, },
@@ -649,6 +657,9 @@ int ipu_cpmem_set_fmt(struct ipuv3_channel *ch, u32 drm_fourcc)
         case DRM_FORMAT_BGRA5551:
                 ipu_cpmem_set_format_rgb(ch, &def_bgra_16);
                 break;
+        case DRM_FORMAT_ARGB4444:
+                ipu_cpmem_set_format_rgb(ch, &def_argb_16_4444);
+                break;
         default:
                 return -EINVAL;
         }