Hi, Le lundi 02 novembre 2026 à 18:03 +0100, Jernej Skrabec a écrit : > The driver allocates the VP8 probability table with 0x2400 bytes, which > is the size the old Allwinner A10 library uses. All newer vendor > libraries allocate 0x5400 bytes and never write the area past 0x11b0 > from the CPU. The hardware uses that area as scratch space, most likely > for the segment map, and its usage grows with the frame size: a > 3840x2160 stream makes the hardware access memory past 0x2400 and > causes IOMMU page faults. > > Allocate the table with 0x5400 bytes, like the vendor libraries do. > > Fixes: 3c39a16d30d8 ("media: cedrus: Add support for VP8 decoding") > Signed-off-by: Jernej Skrabec Reviewed-by: Nicolas Dufresne > --- > drivers/staging/media/sunxi/cedrus/cedrus_vp8.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_vp8.c b/drivers/staging/media/sunxi/cedrus/cedrus_vp8.c > index 969677a3bbf9..6b00efa77c22 100644 > --- a/drivers/staging/media/sunxi/cedrus/cedrus_vp8.c > +++ b/drivers/staging/media/sunxi/cedrus/cedrus_vp8.c > @@ -25,7 +25,7 @@ > #include "cedrus_hw.h" > #include "cedrus_regs.h" > > -#define CEDRUS_ENTROPY_PROBS_SIZE 0x2400 > +#define CEDRUS_ENTROPY_PROBS_SIZE 0x5400 > #define VP8_PROB_HALF 128 > #define QUANT_DELTA_COUNT 5 >