linux-kernel - media: mediatek: vcodec: fix AV1 decode fail for 36bit iova

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Date:   Wed, 28 Jun 2023 13:41:11 +0800
From:   Xiaoyong Lu <xiaoyong.lu@...iatek.com>
To:     Yunfei Dong <yunfei.dong@...iatek.com>,
        Alexandre Courbot <acourbot@...omium.org>,
        Nicolas Dufresne <nicolas@...fresne.ca>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Tiffany Lin <tiffany.lin@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tomasz Figa <tfiga@...gle.com>
CC:     George Sun <george.sun@...iatek.com>,
        Xiaoyong Lu <xiaoyong.lu@...iatek.com>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Fritz Koenig <frkoenig@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Irui Wang <irui.wang@...iatek.com>,
        Steve Cho <stevecho@...omium.org>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: media: mediatek: vcodec: fix AV1 decode fail for 36bit iova

Decoder hardware will access incorrect iova address when tile buffer is
36bit, leading to iommu fault when hardware access dram data.

Fixes: 2f5d0aef37c6 ("media: mediatek: vcodec: support stateless AV1 decoder")
Signed-off-by: Xiaoyong Lu<xiaoyong.lu@...iatek.com>
---
- Test ok: mt8195 32bit and mt8188 36bit iova.
---
 .../platform/mediatek/vcodec/vdec/vdec_av1_req_lat_if.c    | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/mediatek/vcodec/vdec/vdec_av1_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_av1_req_lat_if.c
index 404a1a23fd40..420222c8a56d 100644
--- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_av1_req_lat_if.c
+++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_av1_req_lat_if.c
@@ -1658,9 +1658,9 @@ static void vdec_av1_slice_setup_tile_buffer(struct vdec_av1_slice_instance *ins
 	u32 allow_update_cdf = 0;
 	u32 sb_boundary_x_m1 = 0, sb_boundary_y_m1 = 0;
 	int tile_info_base;
-	u32 tile_buf_pa;
+	u64 tile_buf_pa;
 	u32 *tile_info_buf = instance->tile.va;
-	u32 pa = (u32)bs->dma_addr;
+	u64 pa = (u64)bs->dma_addr;
 
 	if (uh->disable_cdf_update == 0)
 		allow_update_cdf = 1;
@@ -1673,7 +1673,8 @@ static void vdec_av1_slice_setup_tile_buffer(struct vdec_av1_slice_instance *ins
 		tile_info_buf[tile_info_base + 0] = (tile_group->tile_size[tile_num] << 3);
 		tile_buf_pa = pa + tile_group->tile_start_offset[tile_num];
 
-		tile_info_buf[tile_info_base + 1] = (tile_buf_pa >> 4) << 4;
+		tile_info_buf[tile_info_base + 1] = (unsigned int)(tile_buf_pa >> 4) << 4 +
+			((unsigned int)(tile_buf_pa >> 32) & 0xf);
 		tile_info_buf[tile_info_base + 2] = (tile_buf_pa % 16) << 3;
 
 		sb_boundary_x_m1 =
-- 
2.25.1