[Nouveau] [PATCH 0/3] drm/nouveau: Support NVIDIA format modifiers

[James Jones]

This series modifies the NV5x+ nouveau display backends to advertise
appropriate format modifiers on their display planes in atomic mode
setting blobs.

Corresponding modifications to Mesa/userspace are available here:

https://gitlab.freedesktop.org/cubanismo/mesa/tree/nouveau_work

But those need a bit of cleanup before they're ready to submit.

I've tested this on Tesla, Kepler, Pascal, and Turing-class hardware
using various formats and all the exposed format modifiers, plus some
negative testing with invalid ones.

NOTE: this series depends on the "[PATCH v3] drm: Generalized NV Block
Linear DRM format mod" patch submitted to dri-devel.

Signed-off-by: James Jones <jajones at nvidia.com>
---
 drivers/gpu/drm/tegra/dc.c  | 10 ++++++++++
 drivers/gpu/drm/tegra/fb.c  | 14 +++++++-------
 drivers/gpu/drm/tegra/hub.c | 10 ++++++++++
 3 files changed, 27 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index fbf57bc3cdab..a2cc687dc2d8 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -588,6 +588,16 @@ static const u32 tegra124_primary_formats[] = {
 
 static const u64 tegra124_modifiers[] = {
 	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 0),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 1),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 2),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 3),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 4),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 5),
+	/*
+	 * For backwards compatibility with older userspace that may have
+	 * baked in usage of the less-descriptive modifiers
+	 */
 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
index e34325c83d28..d04e0b1c61ea 100644
--- a/drivers/gpu/drm/tegra/fb.c
+++ b/drivers/gpu/drm/tegra/fb.c
@@ -44,7 +44,7 @@ int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
 {
 	uint64_t modifier = framebuffer->modifier;
 
-	switch (modifier) {
+	switch (drm_fourcc_canonicalize_nvidia_format_mod(modifier)) {
 	case DRM_FORMAT_MOD_LINEAR:
 		tiling->mode = TEGRA_BO_TILING_MODE_PITCH;
 		tiling->value = 0;
@@ -55,32 +55,32 @@ int tegra_fb_get_tiling(struct drm_framebuffer *framebuffer,
 		tiling->value = 0;
 		break;
 
-	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0):
+	case DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 0):
 		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
 		tiling->value = 0;
 		break;
 
-	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1):
+	case DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 1):
 		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
 		tiling->value = 1;
 		break;
 
-	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2):
+	case DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 2):
 		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
 		tiling->value = 2;
 		break;
 
-	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3):
+	case DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 3):
 		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
 		tiling->value = 3;
 		break;
 
-	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4):
+	case DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 4):
 		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
 		tiling->value = 4;
 		break;
 
-	case DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5):
+	case DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 5):
 		tiling->mode = TEGRA_BO_TILING_MODE_BLOCK;
 		tiling->value = 5;
 		break;
diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index 839b49c40e51..03c97b10b122 100644
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -49,6 +49,16 @@ static const u32 tegra_shared_plane_formats[] = {
 
 static const u64 tegra_shared_plane_modifiers[] = {
 	DRM_FORMAT_MOD_LINEAR,
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 0),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 1),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 2),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 3),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 4),
+	DRM_FORMAT_MOD_NVIDIA_BLOCK_LINEAR_2D(0, 0, 0, 0xfe, 5),
+	/*
+	 * For backwards compatibility with older userspace that may have
+	 * baked in usage of the less-descriptive modifiers
+	 */
 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
 	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
-- 
2.17.1