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

[Tobias Klausmann]

Hi,

Lgtm!

Reviewed-by: Tobias Klausmann <tobias.johannes.klausmann at mni.thm.de>


On 8/6/17 4:19 AM, Ilia Mirkin wrote:
> 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 */