From: Thierry Reding <treding@nvidia.com>
Date: Thu, 15 Mar 2018 16:45:45 +0100
Subject: drm/tegra: fb: Properly support linear modifier
Git-commit: 4ae4b5c0dbaa499f2fd9215caac6e474c8dd477f
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Instead of relying on the tiling attached to a buffer object, make sure
to set the proper tiling for linear buffers.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/tegra/fb.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/tegra/fb.c
+++ b/drivers/gpu/drm/tegra/fb.c
@@ -55,6 +55,11 @@ int tegra_fb_get_tiling(struct drm_frame
 	uint64_t modifier = fb->base.modifier;
 
 	switch (modifier) {
+	case DRM_FORMAT_MOD_LINEAR:
+		tiling->mode = TEGRA_BO_TILING_MODE_PITCH;
+		tiling->value = 0;
+		break;
+
 	case DRM_FORMAT_MOD_NVIDIA_TEGRA_TILED:
 		tiling->mode = TEGRA_BO_TILING_MODE_TILED;
 		tiling->value = 0;
@@ -91,9 +96,7 @@ int tegra_fb_get_tiling(struct drm_frame
 		break;
 
 	default:
-		/* TODO: handle YUV formats? */
-		*tiling = fb->planes[0]->tiling;
-		break;
+		return -EINVAL;
 	}
 
 	return 0;