[PATCH 5/6] gpu: ipu-v3: add support for ARGB4444 16-bit color format

[Philipp Zabel]

From: Lucas Stach <l.st...@pengutronix.de>

This patch adds support for the ARGB4444 color format.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
 drivers/gpu/ipu-v3/ipu-common.c |  1 +
 drivers/gpu/ipu-v3/ipu-cpmem.c  | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index acf0729..8ba3e51 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 0e6b868..63eb16b 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;
        }
-- 
2.5.0