[PATCH 4/4] drm: Add and handle new aspect ratios in DRM layer

[Shashank Sharma]

HDMI 2.0/CEA-861-F introduces two new aspect ratios:
- 64:27
- 256:135

This patch:
-  Adds new DRM flags for to represent these new aspect ratios.
-  Adds new cases to handle these aspect ratios while converting
from user->kernel mode or viseversa.

Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
---
 drivers/gpu/drm/drm_modes.c | 12 ++++++++++++
 include/uapi/drm/drm_mode.h |  6 ++++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index e6029e0..bdc353d 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1481,6 +1481,12 @@ void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
 	case HDMI_PICTURE_ASPECT_16_9:
 		out->flags |= DRM_MODE_FLAG_PAR16_9;
 		break;
+	case HDMI_PICTURE_ASPECT_64_27:
+		out->flags |= DRM_MODE_FLAG_PAR64_27;
+		break;
+	case DRM_MODE_PICTURE_ASPECT_256_135:
+		out->flags |= DRM_MODE_FLAG_PAR256_135;
+		break;
 	case HDMI_PICTURE_ASPECT_NONE:
 	case HDMI_PICTURE_ASPECT_RESERVED:
 	default:
@@ -1543,6 +1549,12 @@ int drm_mode_convert_umode(struct drm_display_mode *out,
 	case DRM_MODE_FLAG_PAR16_9:
 		out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_16_9;
 		break;
+	case DRM_MODE_FLAG_PAR64_27:
+		out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_64_27;
+		break;
+	case DRM_MODE_FLAG_PAR256_135:
+		out->picture_aspect_ratio |= HDMI_PICTURE_ASPECT_256_135;
+		break;
 	default:
 		out->picture_aspect_ratio = HDMI_PICTURE_ASPECT_NONE;
 	}
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index cd66a95..6291eae 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -81,6 +81,8 @@ extern "C" {
 #define DRM_MODE_PICTURE_ASPECT_NONE		0
 #define DRM_MODE_PICTURE_ASPECT_4_3		1
 #define DRM_MODE_PICTURE_ASPECT_16_9		2
+#define DRM_MODE_PICTURE_ASPECT_64_27		3
+#define DRM_MODE_PICTURE_ASPECT_256_135	4
 
 /* Aspect ratio flag bitmask (4 bits 22:19) */
 #define DRM_MODE_FLAG_PARMASK			(0x0F<<19)
@@ -90,6 +92,10 @@ extern "C" {
 			(DRM_MODE_PICTURE_ASPECT_4_3 << 19)
 #define  DRM_MODE_FLAG_PAR16_9 \
 			(DRM_MODE_PICTURE_ASPECT_16_9 << 19)
+#define  DRM_MODE_FLAG_PAR64_27 \
+			(DRM_MODE_PICTURE_ASPECT_64_27 << 19)
+#define  DRM_MODE_FLAG_PAR256_135 \
+			(DRM_MODE_PICTURE_ASPECT_256_135 << 19)
 
 /* DPMS flags */
 /* bit compatible with the xorg definitions. */
-- 
1.9.1