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The following error was reported.
-----------------------------------------------------------
root@imx6qdlsolo:~# /unit_tests/mxc_v4l2_capture.out -d /dev/video1 1.yuv
in_width = 176, in_height = 144
out_width = 176, out_height = 144
top = 0, left = 0
mipi csi2 can not receive sensor clk!
sensor chip is ov5640_mipi_camera
sensor supported frame size:
640x480
320x240
720x480
720x576
1280x720
1920x1080
2592x1944
176x144
1024x768
sensor frame format: UYVY
sensor frame format: UYVY
sensor frame format: UYVY
sensor frame format: UYVY
sensor frame format: UYVY
sensor frame format: UYVY
sensor frame format: UYVY
sensor frame format: UYVY
sensor frame format: UYVY
mipi csi2 can not receive sensor clk!
mxc_v4l2_s_param: vidioc_int_s_parm returned an error -1
VIDIOC_S_PARM failed
get format failed
-----------------------------------------------------------
Root cause analysis:
It only happens when HDMI is not used/enabled. There is a clock named
video_27m which are needed by HDMI (as isfrclk's parent) and MIPI-CSI2 (as
cfg_clk's parent). MIPI-CSI2 driver is lack of enabling this clock before
start to work and only happen to work when HDMI driver enables this clock.
Signed-off-by: Robby Cai <R63905@freescale.com>
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The original mipi csi2 driver uses readl()/writel()
to access the 32 bit mipi csi2 registers in the
following way where info->mipi_csi2_base is a pointer
which points to a 32 bit I/O memory cell of the mipi
csi2's base address:
writel(value, info->mipi_csi2_base + offset);
readl(info->mipi_csi2_base + offset);
This makes the register offset values shrink 4 times,
comparing to the offset values documented in the
reference manual. For example, we need to change the
offset value from 0x004 to 0x001 so that we may access
the register MIPI_CSI2_N_LANES correctly.
This patch redefines the type of info->mipi_csi2_base
to 'void __iomem *', then the offset values can be the
same to what they are documented. Also, the macro names
for the registers are aligned to the documentation.
Acked-by: Robby Cai <R63905@freescale.com>
Cc: Oliver Brown <oliver.brown@freescale.com>
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
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Copied mipi_csi.h from:
commit 50ca92f4010a93be265de7aad501b4dcae095a63
Author: Sheng Nan <b38800@freescale.com>
Date: Thu Mar 7 13:39:54 2013 +0800
ARM: include: remove definition of mipi-csi2 platform data
Other files copied files from:
commit 1fb93870965b7d8d67b4db6233a30c06d82f84fc
Author: Liu Ying <Ying.Liu@freescale.com>
Date: Thu Mar 21 12:15:52 2013 +0800
MIPI-CSI2:Fix a build warning
- Changed includes files for 3.10
- Dropped deprecated __devexit
- Added generic error message if probe fails
- Added configuration and set default to 'n'
Signed-off-by: Oliver Brown <oliver.brown@freescale.com>
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