[PATCH] drm/nouveau/mpeg: print more debug info when rejecting dma objects

[Ilia Mirkin]

Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---

This was helpful when debugging our earlier mpeg woes. May as well have it upstream.

 drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv31.c | 7 ++++++-
 drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv40.c | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv31.c b/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv31.c
index 8a8895246d26..99f33d88d940 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv31.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv31.c
@@ -124,6 +124,8 @@ nv31_mpeg_tile(struct nvkm_engine *engine, int i, struct nvkm_fb_tile *tile)
 static bool
 nv31_mpeg_mthd_dma(struct nvkm_device *device, u32 mthd, u32 data)
 {
+	struct nv31_mpeg *mpeg = nv31_mpeg(device->mpeg);
+	struct nvkm_subdev *subdev = &mpeg->engine.subdev;
 	u32 inst = data << 4;
 	u32 dma0 = nvkm_rd32(device, 0x700000 + inst);
 	u32 dma1 = nvkm_rd32(device, 0x700004 + inst);
@@ -132,8 +134,11 @@ nv31_mpeg_mthd_dma(struct nvkm_device *device, u32 mthd, u32 data)
 	u32 size = dma1 + 1;
 
 	/* only allow linear DMA objects */
-	if (!(dma0 & 0x00002000))
+	if (!(dma0 & 0x00002000)) {
+		nvkm_error(subdev, "inst %08x dma0 %08x dma1 %08x dma2 %08x\n",
+			   inst, dma0, dma1, dma2);
 		return false;
+	}
 
 	if (mthd == 0x0190) {
 		/* DMA_CMD */
diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv40.c b/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv40.c
index 16de5bd94b14..b5ec7c504dc6 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv40.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/mpeg/nv40.c
@@ -31,6 +31,8 @@ bool
 nv40_mpeg_mthd_dma(struct nvkm_device *device, u32 mthd, u32 data)
 {
 	struct nvkm_instmem *imem = device->imem;
+	struct nv31_mpeg *mpeg = nv31_mpeg(device->mpeg);
+	struct nvkm_subdev *subdev = &mpeg->engine.subdev;
 	u32 inst = data << 4;
 	u32 dma0 = nvkm_instmem_rd32(imem, inst + 0);
 	u32 dma1 = nvkm_instmem_rd32(imem, inst + 4);
@@ -39,8 +41,11 @@ nv40_mpeg_mthd_dma(struct nvkm_device *device, u32 mthd, u32 data)
 	u32 size = dma1 + 1;
 
 	/* only allow linear DMA objects */
-	if (!(dma0 & 0x00002000))
+	if (!(dma0 & 0x00002000)) {
+		nvkm_error(subdev, "inst %08x dma0 %08x dma1 %08x dma2 %08x\n",
+			   inst, dma0, dma1, dma2);
 		return false;
+	}
 
 	if (mthd == 0x0190) {
 		/* DMA_CMD */
-- 
2.13.0