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[213.161.3.76]) by smtp.gmail.com with ESMTPSA id k20-20020adfc714000000b002103aebe8absm14006977wrg.93.2022.06.20.11.13.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Jun 2022 11:13:37 -0700 (PDT) From: Jernej Skrabec To: mripard@kernel.org, wens@csie.org Cc: airlied@linux.ie, daniel@ffwll.ch, samuel@sholland.org, dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, Jernej Skrabec Subject: [PATCH v2] drm/sun4i: Add DMA mask and segment size Date: Mon, 20 Jun 2022 20:13:33 +0200 Message-Id: <20220620181333.650301-1-jernej.skrabec@gmail.com> X-Mailer: git-send-email 2.36.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Kernel occasionally complains that there is mismatch in segment size when trying to render HW decoded videos and rendering them directly with sun4i DRM driver. Following message can be observed on H6 SoC: [ 184.298308] ------------[ cut here ]------------ [ 184.298326] DMA-API: sun4i-drm display-engine: mapping sg segment longer= than device claims to support [len=3D6144000] [max=3D65536] [ 184.298364] WARNING: CPU: 1 PID: 382 at kernel/dma/debug.c:1162 debug_dm= a_map_sg+0x2b0/0x350 [ 184.322997] CPU: 1 PID: 382 Comm: ffmpeg Not tainted 5.19.0-rc1+ #1331 [ 184.329533] Hardware name: Tanix TX6 (DT) [ 184.333544] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE= =3D--) [ 184.340512] pc : debug_dma_map_sg+0x2b0/0x350 [ 184.344882] lr : debug_dma_map_sg+0x2b0/0x350 [ 184.349250] sp : ffff800009f33a50 [ 184.352567] x29: ffff800009f33a50 x28: 0000000000010000 x27: ffff000001b= 86c00 [ 184.359725] x26: ffffffffffffffff x25: ffff000005d8cc80 x24: 00000000000= 00000 [ 184.366879] x23: ffff80000939ab18 x22: 0000000000000001 x21: 00000000000= 00001 [ 184.374031] x20: 0000000000000000 x19: ffff0000018a7410 x18: fffffffffff= fffff [ 184.381186] x17: 0000000000000000 x16: 0000000000000000 x15: fffffffffff= fffff [ 184.388338] x14: 0000000000000001 x13: ffff800009534e86 x12: 6f707075732= 06f74 [ 184.395493] x11: 20736d69616c6320 x10: 000000000000000a x9 : 00000000000= 10000 [ 184.402647] x8 : ffff8000093b6d40 x7 : ffff800009f33850 x6 : 00000000000= 0000c [ 184.409800] x5 : ffff0000bf997940 x4 : 0000000000000000 x3 : 00000000000= 00027 [ 184.416953] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000039= 60e80 [ 184.424106] Call trace: [ 184.426556] debug_dma_map_sg+0x2b0/0x350 [ 184.430580] __dma_map_sg_attrs+0xa0/0x110 [ 184.434687] dma_map_sgtable+0x28/0x4c [ 184.438447] vb2_dc_dmabuf_ops_map+0x60/0xcc [ 184.442729] __map_dma_buf+0x2c/0xd4 [ 184.446321] dma_buf_map_attachment+0xa0/0x130 [ 184.450777] drm_gem_prime_import_dev+0x7c/0x18c [ 184.455410] drm_gem_prime_fd_to_handle+0x1b8/0x214 [ 184.460300] drm_prime_fd_to_handle_ioctl+0x2c/0x40 [ 184.465190] drm_ioctl_kernel+0xc4/0x174 [ 184.469123] drm_ioctl+0x204/0x420 [ 184.472534] __arm64_sys_ioctl+0xac/0xf0 [ 184.476474] invoke_syscall+0x48/0x114 [ 184.480240] el0_svc_common.constprop.0+0x44/0xec [ 184.484956] do_el0_svc+0x2c/0xc0 [ 184.488283] el0_svc+0x2c/0x84 [ 184.491354] el0t_64_sync_handler+0x11c/0x150 [ 184.495723] el0t_64_sync+0x18c/0x190 [ 184.499397] ---[ end trace 0000000000000000 ]--- Fix that by setting DMA mask and segment size. Signed-off-by: Jernej Skrabec Reviewed-by: Samuel Holland --- Changes from v1: - added comment - updated commit message with kernel report drivers/gpu/drm/sun4i/sun4i_drv.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4= i_drv.c index 275f7e4a03ae..f135a6b3cadb 100644 --- a/drivers/gpu/drm/sun4i/sun4i_drv.c +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c @@ -7,6 +7,7 @@ */ =20 #include +#include #include #include #include @@ -367,6 +368,13 @@ static int sun4i_drv_probe(struct platform_device *pde= v) =20 INIT_KFIFO(list.fifo); =20 + /* + * DE2 and DE3 cores actually supports 40-bit addresses, but + * driver does not. + */ + dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); + dma_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32)); + for (i =3D 0;; i++) { struct device_node *pipeline =3D of_parse_phandle(np, "allwinner,pipelines", --=20 2.36.1