[PATCH v2 3/3] drm/i915/gvt: Add RGB 64-bit 16:16:16:16 float format support

[Tina Zhang]

The RGB 64-bit 16:16:16:16 float pixel format is needed by windows 10
guest VM. This patch is to add this pixel format support to gvt device
model. Without this patch, some Apps, e.g. "DXGIGammaVM.exe", will crash
and make guest screen black.

Signed-off-by: Xiaoguang Chen <xiaoguang.chen at intel.com>
Signed-off-by: Tina Zhang <tina.zhang at intel.com>
---
 drivers/gpu/drm/i915/gvt/fb_decoder.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/i915/gvt/fb_decoder.c b/drivers/gpu/drm/i915/gvt/fb_decoder.c
index 2bd5b3c..739ca81 100644
--- a/drivers/gpu/drm/i915/gvt/fb_decoder.c
+++ b/drivers/gpu/drm/i915/gvt/fb_decoder.c
@@ -54,6 +54,8 @@ static struct pixel_format bdw_pixel_formats[PRIMARY_FORMAT_NUM] = {
 		"32-bit RGBX (2:10:10:10 MSB-X:B:G:R)"},
 	[0xa] = {DRM_FORMAT_XRGB2101010, 32,
 		"32-bit BGRX (2:10:10:10 MSB-X:R:G:B)"},
+	[0xc] = {DRM_FORMAT_XRGB161616, 64,
+		"64-bit RGBX Floating Point(16:16:16:16 MSB-X:B:G:R)"},
 	[0xe] = {DRM_FORMAT_XBGR8888, 32,
 		"32-bit RGBX (8:8:8:8 MSB-X:B:G:R)"},
 };
@@ -75,6 +77,10 @@ static struct pixel_format skl_pixel_formats[] = {
 	{DRM_FORMAT_XBGR2101010, 32, "32-bit RGBX (2:10:10:10 MSB-X:B:G:R)"},
 	{DRM_FORMAT_XRGB2101010, 32, "32-bit BGRX (2:10:10:10 MSB-X:R:G:B)"},
 
+	{DRM_FORMAT_XRGB161616, 64,
+		"64-bit XRGB (16:16:16:16 MSB-X:R:G:B)"},
+	{DRM_FORMAT_XBGR161616, 64,
+		"64-bit XBGR (16:16:16:16 MSB-X:B:G:R)"},
 
 	/* non-supported format has bpp default to 0 */
 	{0, 0, NULL},
@@ -101,6 +107,9 @@ static int skl_format_to_drm(int format, bool rgb_order, bool alpha,
 	case PLANE_CTL_FORMAT_XRGB_2101010:
 		skl_pixel_formats_index = rgb_order ? 10 : 11;
 		break;
+	case PLANE_CTL_FORMAT_XRGB_16161616F:
+		skl_pixel_formats_index = rgb_order ? 12 : 13;
+		break;
 	case PLANE_CTL_FORMAT_YUV422:
 		skl_pixel_formats_index = yuv_order >> 16;
 		if (skl_pixel_formats_index > 3)
@@ -321,6 +330,8 @@ static struct pixel_format sprite_pixel_formats[SPRITE_FORMAT_NUM] = {
 	[0x0]  = {DRM_FORMAT_YUV422, 16, "YUV 16-bit 4:2:2 packed"},
 	[0x1]  = {DRM_FORMAT_XRGB2101010, 32, "RGB 32-bit 2:10:10:10"},
 	[0x2]  = {DRM_FORMAT_XRGB8888, 32, "RGB 32-bit 8:8:8:8"},
+	[0x3]  = {DRM_FORMAT_XRGB161616, 64,
+		    "RGB 64-bit 16:16:16:16 Floating Point"},
 	[0x4] = {DRM_FORMAT_AYUV, 32,
 		"YUV 32-bit 4:4:4 packed (8:8:8:8 MSB-X:Y:U:V)"},
 };
-- 
2.7.4