drm/i915: Add NV12 support to intel_framebuffer_init

chandra4code · mlankhorst · commit e44134f2673c · 2018-05-11T10:19:48.000+02:00
This patch adds NV12 as supported format to intel_framebuffer_init and performs various checks. v2: -Fix an issue in checks added (Chandra Konduru) v3: rebased (me) v4: Review comments by Ville addressed Added platform check for NV12 in intel_framebuffer_init Removed offset checks for NV12 case v5: Addressed review comments by Clinton A Taylor This NV12 support only correctly works on SKL. Plane color space conversion is different on GLK and later platforms causing the colors to display incorrectly. Ville's plane color space property patch series in review will fix this issue. - Restricted the NV12 case in intel_framebuffer_init to SKL and BXT only. v6: Rebased (me) v7: Addressed review comments by Ville Restricting the NV12 to BXT for now. v8: Rebased (me) Restricting the NV12 changes to BXT and KBL for now. v9: Rebased (me) v10: NV12 supported by all GEN >= 9. Making this change in intel_framebuffer_init. This is part of addressing Maarten's review comments. Comment under v8 no longer applicable v11: Addressed review comments from Shashank Sharma v12: Adding Reviewed By from Shashank Sharma v13: Addressed review comments from Juha-Pekka Heikkila "NV12 not to be supported by SKL" v14: Addressed review comments from Maarten. Add checks for fb width height for NV12 and fail the fb creation if check fails. Added reviewed by from Juha-Pekka Heikkila v15: Rebased the series v16: Setting the minimum value during fb creating to 16 as per Bspec for NV12. Earlier minimum was expected to be > 16. Now changed it to >=16. v17: Adding restriction to framebuffer_init - the fb width and height should be a multiplier of 4 v18: Added RB from Maarten. Included Maarten's review comments Dont allow CCS formats for fb creation of NV12 v19: Review comments from Maarten addressed - Removing BROXTON support for NV12 due to WA826 Credits-to: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Tested-by: Clinton Taylor <clinton.a.taylor@intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Shashank Sharma <shashank.sharma@intel.com> Reviewed-by: Clinton Taylor <clinton.a.taylor@intel.com> Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com> Signed-off-by: Chandra Konduru <chandra.konduru@intel.com> Signed-off-by: Nabendu Maiti <nabendu.bikash.maiti@intel.com> Signed-off-by: Vidya Srinivas <vidya.srinivas@intel.com> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1526074397-10457-5-git-send-email-vidya.srinivas@intel.com
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
@@ -14307,6 +14307,20 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 			goto err;
 		}
 		break;
+	case DRM_FORMAT_NV12:
+		if (mode_cmd->modifier[0] == I915_FORMAT_MOD_Y_TILED_CCS ||
+		    mode_cmd->modifier[0] == I915_FORMAT_MOD_Yf_TILED_CCS) {
+			DRM_DEBUG_KMS("RC not to be enabled with NV12\n");
+			goto err;
+		}
+		if (INTEL_GEN(dev_priv) < 9 || IS_SKYLAKE(dev_priv) ||
+		    IS_BROXTON(dev_priv)) {
+			DRM_DEBUG_KMS("unsupported pixel format: %s\n",
+				      drm_get_format_name(mode_cmd->pixel_format,
+							  &format_name));
+			goto err;
+		}
+		break;
 	default:
 		DRM_DEBUG_KMS("unsupported pixel format: %s\n",
 			      drm_get_format_name(mode_cmd->pixel_format, &format_name));
@@ -14319,6 +14333,14 @@ static int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
 
 	drm_helper_mode_fill_fb_struct(&dev_priv->drm, fb, mode_cmd);
 
+	if (fb->format->format == DRM_FORMAT_NV12 &&
+	    (fb->width < SKL_MIN_YUV_420_SRC_W ||
+	     fb->height < SKL_MIN_YUV_420_SRC_H ||
+	     (fb->width % 4) != 0 || (fb->height % 4) != 0)) {
+		DRM_DEBUG_KMS("src dimensions not correct for NV12\n");
+		return -EINVAL;
+	}
+
 	for (i = 0; i < fb->format->num_planes; i++) {
 		u32 stride_alignment;
 
