Vivek Gautam de2563bce7 media: venus: core: Set dma maximum segment size ... Turning on CONFIG_DMA_API_DEBUG_SG results in the following error: [ 460.308650] ------------[ cut here ]------------ [ 460.313490] qcom-venus aa00000.video-codec: DMA-API: mapping sg segment longer than device claims to support [len=4194304] [max=65536] [ 460.326017] WARNING: CPU: 3 PID: 3555 at src/kernel/dma/debug.c:1301 debug_dma_map_sg+0x174/0x254 [ 460.338888] Modules linked in: venus_dec venus_enc videobuf2_dma_sg videobuf2_memops hci_uart btqca bluetooth venus_core v4l2_mem2mem videobuf2_v4l2 videobuf2_common ath10k_snoc ath10k_core ath lzo lzo_compress zramjoydev [ 460.375811] CPU: 3 PID: 3555 Comm: V4L2DecoderThre Tainted: G W 4.19.1 #82 [ 460.384223] Hardware name: Google Cheza (rev1) (DT) [ 460.389251] pstate: 60400009 (nZCv daif +PAN -UAO) [ 460.394191] pc : debug_dma_map_sg+0x174/0x254 [ 460.398680] lr : debug_dma_map_sg+0x174/0x254 [ 460.403162] sp : ffffff80200c37d0 [ 460.406583] x29: ffffff80200c3830 x28: 0000000000010000 [ 460.412056] x27: 00000000ffffffff x26: ffffffc0f785ea80 [ 460.417532] x25: 0000000000000000 x24: ffffffc0f4ea1290 [ 460.423001] x23: ffffffc09e700300 x22: ffffffc0f4ea1290 [ 460.428470] x21: ffffff8009037000 x20: 0000000000000001 [ 460.433936] x19: ffffff80091b0000 x18: 0000000000000000 [ 460.439411] x17: 0000000000000000 x16: 000000000000f251 [ 460.444885] x15: 0000000000000006 x14: 0720072007200720 [ 460.450354] x13: ffffff800af536e0 x12: 0000000000000000 [ 460.455822] x11: 0000000000000000 x10: 0000000000000000 [ 460.461288] x9 : 537944d9c6c48d00 x8 : 537944d9c6c48d00 [ 460.466758] x7 : 0000000000000000 x6 : ffffffc0f8d98f80 [ 460.472230] x5 : 0000000000000000 x4 : 0000000000000000 [ 460.477703] x3 : 000000000000008a x2 : ffffffc0fdb13948 [ 460.483170] x1 : ffffffc0fdb0b0b0 x0 : 000000000000007a [ 460.488640] Call trace: [ 460.491165] debug_dma_map_sg+0x174/0x254 [ 460.495307] vb2_dma_sg_alloc+0x260/0x2dc [videobuf2_dma_sg] [ 460.501150] __vb2_queue_alloc+0x164/0x374 [videobuf2_common] [ 460.507076] vb2_core_reqbufs+0xfc/0x23c [videobuf2_common] [ 460.512815] vb2_reqbufs+0x44/0x5c [videobuf2_v4l2] [ 460.517853] v4l2_m2m_reqbufs+0x44/0x78 [v4l2_mem2mem] [ 460.523144] v4l2_m2m_ioctl_reqbufs+0x1c/0x28 [v4l2_mem2mem] [ 460.528976] v4l_reqbufs+0x30/0x40 [ 460.532480] __video_do_ioctl+0x36c/0x454 [ 460.536610] video_usercopy+0x25c/0x51c [ 460.540572] video_ioctl2+0x38/0x48 [ 460.544176] v4l2_ioctl+0x60/0x74 [ 460.547602] do_video_ioctl+0x948/0x3520 [ 460.551648] v4l2_compat_ioctl32+0x60/0x98 [ 460.555872] __arm64_compat_sys_ioctl+0x134/0x20c [ 460.560718] el0_svc_common+0x9c/0xe4 [ 460.564498] el0_svc_compat_handler+0x2c/0x38 [ 460.568982] el0_svc_compat+0x8/0x18 [ 460.572672] ---[ end trace ce209b87b2f3af88 ]--- >From above warning one would deduce that the sg segment will overflow the device's capacity. In reality, the hardware can accommodate larger sg segments. So, initialize the max segment size properly to weed out this warning. Based on a similar patch sent by Sean Paul for mdss: https://patchwork.kernel.org/patch/10671457/ Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org> Acked-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>		2018-12-07 08:28:10 -05:00
..
cec	media: cec: keep track of outstanding transmits	2018-11-23 05:56:14 -05:00
common	media: vb2: be sure to unlock mutex on errors	2018-11-23 07:29:54 -05:00
dvb-core	media: dvb_frontend: add debug message for frequency intervals	2018-11-23 11:59:45 -05:00
dvb-frontends	media: remove redundant include moduleparam.h	2018-12-05 04:33:45 -05:00
firewire	media: firewire: Fix app_info parameter type in avc_ca{,_app}_info	2018-12-05 05:34:33 -05:00
i2c	media: ov5640: Remove duplicate auto-exposure setup	2018-12-05 06:51:11 -05:00
mmc	media: siano: use GFP_DMA only for smssdio	2018-05-15 08:04:42 -04:00
pci	media: ddbridge: remove another duplicate of io.h and sort includes	2018-12-05 05:04:49 -05:00
platform	media: venus: core: Set dma maximum segment size	2018-12-07 08:28:10 -05:00
radio	media: replace strcpy() by strscpy()	2018-09-11 13:32:17 -04:00
rc	media: rc: ensure close() is called on rc_unregister_device	2018-11-22 13:33:24 -05:00
spi	media: cxd2880-spi: Add optional vcc regulator	2018-12-03 13:33:16 -05:00
tuners	media: si2157: declare its own pads	2018-09-17 13:16:19 -04:00
usb	media: pvrusb2: fix spelling mistake "statuss" -> "status"	2018-12-07 08:19:19 -05:00
v4l2-core	media: v4l2-ioctl: Zero v4l2_plane_pix_format reserved fields	2018-12-07 08:26:53 -05:00
Kconfig	media: cec: Kconfig coding style issue	2018-05-09 16:26:50 -04:00
Makefile	media: media-request: implement media requests	2018-08-31 11:04:51 -04:00
media-device.c	media updates for v4.20-rc1	2018-10-31 10:53:29 -07:00
media-devnode.c	MAINTAINERS & files: Canonize the e-mails I use at files	2018-05-04 06:21:06 -04:00
media-entity.c	media: v4l2-mc: switch it to use the new approach to setup pipelines	2018-09-17 13:16:19 -04:00
media-request.c	media: media-request: Add compat ioctl	2018-11-20 12:53:27 -05:00