[PATCH v11 5/7] media: verisilicon: AV1: Restore IOMMU context before decoding a frame
From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Date: 2026-01-07 10:10:20
Also in:
linux-devicetree, linux-iommu, linux-media, linux-rockchip, lkml
Subsystem:
arm/rockchip soc support, hantro vpu codec driver, media input infrastructure (v4l/dvb), the rest · Maintainers:
Heiko Stuebner, Nicolas Dufresne, Benjamin Gaignard, Philipp Zabel, Mauro Carvalho Chehab, Linus Torvalds
AV1 is a stateless decoder which means multiple AV1 bitstreams could be decoded at the same time using the same hardware block. Before decoding a frame it is needed to restore the iommu tables to avoid mixing decode contexts. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> --- .../verisilicon/rockchip_vpu981_hw_av1_dec.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c b/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c
index e4703bb6be7c..d9e68e0ded68 100644
--- a/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c
+++ b/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c@@ -5,6 +5,9 @@ * Author: Benjamin Gaignard <benjamin.gaignard@collabora.com> */ +#include <linux/iommu.h> +#include <linux/vsi-iommu.h> + #include <media/v4l2-mem2mem.h> #include "hantro.h" #include "hantro_v4l2.h"
@@ -2095,12 +2098,24 @@ rockchip_vpu981_av1_dec_set_output_buffer(struct hantro_ctx *ctx) hantro_write_addr(vpu, AV1_TILE_OUT_MV, mv_addr); } +static void rockchip_vpu981_av1_restore_iommu(struct hantro_ctx *ctx) +{ + struct iommu_domain *domain; + + /* Before decoding any frame iommu context need to be restored */ + domain = iommu_get_domain_for_dev(ctx->dev->v4l2_dev.dev); + if (domain) + vsi_iommu_restore_ctx(domain); +} + int rockchip_vpu981_av1_dec_run(struct hantro_ctx *ctx) { struct hantro_dev *vpu = ctx->dev; struct vb2_v4l2_buffer *vb2_src; int ret; + rockchip_vpu981_av1_restore_iommu(ctx); + hantro_start_prepare_run(ctx); ret = rockchip_vpu981_av1_dec_prepare_run(ctx);
--
2.43.0