[PATCH v2 7/8] drm: vkms: Exposes ARGB_1616161616 and adds XRGB_16161616 formats

[Igor Torrente <igormtorrente@gmail.com>]

This will be useful to write tests that depends on these formats.

ARGB format is already used as the universal format for internal uses.
Here we are just exposing it to the user space.

XRGB follows the a similar implementation of the former format.
Just overwriting the alpha channel.

Signed-off-by: Igor Torrente <igormtorrente@gmail.com>
---
 drivers/gpu/drm/vkms/vkms_composer.c  |  4 ++++
 drivers/gpu/drm/vkms/vkms_formats.h   | 25 +++++++++++++++++++++++++
 drivers/gpu/drm/vkms/vkms_plane.c     |  5 ++++-
 drivers/gpu/drm/vkms/vkms_writeback.c |  2 ++
 4 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
index 69fe3a89bdc9..f16fcfc88cea 100644
--- a/drivers/gpu/drm/vkms/vkms_composer.c
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -164,6 +164,8 @@ static void ((*get_line_fmt_transform_function(u32 format))
 		return &ARGB8888_to_ARGB16161616;
 	else if (format == DRM_FORMAT_ARGB16161616)
 		return &get_ARGB16161616;
+	else if (format == DRM_FORMAT_XRGB16161616)
+		return &XRGB16161616_to_ARGB16161616;
 	else
 		return &XRGB8888_to_ARGB16161616;
 }
@@ -175,6 +177,8 @@ static void ((*get_output_line_function(u32 format))
 		return &convert_to_ARGB8888;
 	else if (format == DRM_FORMAT_ARGB16161616)
 		return &convert_to_ARGB16161616;
+	else if (format == DRM_FORMAT_XRGB16161616)
+		return &convert_to_XRGB16161616;
 	else
 		return &convert_to_XRGB8888;
 }
diff --git a/drivers/gpu/drm/vkms/vkms_formats.h b/drivers/gpu/drm/vkms/vkms_formats.h
index 5b850fce69f3..aa433edd00bd 100644
--- a/drivers/gpu/drm/vkms/vkms_formats.h
+++ b/drivers/gpu/drm/vkms/vkms_formats.h
@@ -89,6 +89,19 @@ static void get_ARGB16161616(void *pixels_addr, int length, u64 *line_buffer)
 	}
 }
 
+static void XRGB16161616_to_ARGB16161616(void *pixels_addr, int length,
+					 u64 *line_buffer)
+{
+	__le64 *src_pixels = pixels_addr;
+	int i;
+
+	for (i = 0; i < length; i++) {
+		line_buffer[i] = le64_to_cpu(*src_pixels) | (0xffffllu << 48);
+
+		src_pixels++;
+	}
+}
+
 /*
  * The following functions are used as blend operations. But unlike the
  * `alpha_blend`, these functions take an ARGB16161616 pixel from the
@@ -152,4 +165,16 @@ static void convert_to_ARGB16161616(void *pixels_addr, int length,
 	}
 }
 
+static void convert_to_XRGB16161616(void *pixels_addr, int length,
+				    u64 *line_buffer)
+{
+	__le64 *dst_pixels = pixels_addr;
+	int i;
+
+	for (i = 0; i < length; i++) {
+		*dst_pixels = cpu_to_le64(line_buffer[i] | (0xffffllu << 48));
+		dst_pixels++;
+	}
+}
+
 #endif /* _VKMS_FORMATS_H_ */
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index 0a28cb7a85e2..516e48b38806 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -13,11 +13,14 @@
 
 static const u32 vkms_formats[] = {
 	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XRGB16161616
 };
 
 static const u32 vkms_plane_formats[] = {
 	DRM_FORMAT_ARGB8888,
-	DRM_FORMAT_XRGB8888
+	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XRGB16161616,
+	DRM_FORMAT_ARGB16161616
 };
 
 static struct drm_plane_state *
diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c
index 42f3396c523a..0f7bb77f981e 100644
--- a/drivers/gpu/drm/vkms/vkms_writeback.c
+++ b/drivers/gpu/drm/vkms/vkms_writeback.c
@@ -14,6 +14,8 @@
 
 static const u32 vkms_wb_formats[] = {
 	DRM_FORMAT_XRGB8888,
+	DRM_FORMAT_XRGB16161616,
+	DRM_FORMAT_ARGB16161616
 };
 
 static const struct drm_connector_funcs vkms_wb_connector_funcs = {
-- 
2.30.2