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The ISP clock register content is not preserved over the ISP power domain
off/on cycle. Instead of setting the clock frequencies once at probe time
the clock rates set up is moved to the runtime_resume handler, which is
invoked after the related power domain is already enabled, ensuring the
clocks are properly configured when the device is actively used.
This fixes the FIMC-IS malfunctions and STREAM ON timeout errors accuring
on some boards:
[ 59.860000] fimc_is_general_irq_handler:583 ISR_NDONE: 5: 0x800003e8, IS_ERROR_UNKNOWN
[ 59.860000] fimc_is_general_irq_handler:586 IS_ERROR_TIME_OUT
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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The "sysreg" clock is required by multiple subsystems and none of the
other drivers handles this clock explicitly. It is currently assumed
that this clock is always on, left in its default state after system
reset.
Remove handling of this clock from the FIMC-IS driver to avoid breaking
other subsystems.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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configured
Use clk_prepare_enable/clk_unprepare_disable instead of preparing the
clocks during the driver initalization and then using just clk_disable/
clk_enable. The clock framework doesn't guarantee a clock will not get
enabled during e.g. clk_set_parent if clk_prepare has been called on it.
So we ensure clk_prepare() is called only when it is safe to enable
the clocks, i.e. the parent clocks and the clocks' frequencies are set.
It must be ensured the FIMC-IS clocks have proper frequencies before they
are enabled, otherwise the whole system will hang.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyunmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Ensure the firmware isn't accessed in the driver when the firmware loading
routine has not completed. This fixes a potential kernel crash:
[ 96.510000] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 96.520000] pgd = ee604000
[ 96.520000] [00000000] *pgd=6e947831, *pte=00000000, *ppte=00000000
[ 96.530000] Internal error: Oops: 17 [#1] PREEMPT SMP ARM
[ 96.530000] Modules linked in:
[ 96.530000] CPU: 2 PID: 2787 Comm: camera_test Not tainted 3.10.0-rc1-00269-gcdbde37-dirty #2158
[ 96.545000] task: ee42e400 ti: edfcc000 task.ti: edfcc000
[ 96.545000] PC is at fimc_is_start_firmware+0x14/0x94
[ 96.545000] LR is at fimc_isp_subdev_s_power+0x13c/0x1f8
...
[ 96.745000] [<c03e0354>] (fimc_is_start_firmware+0x14/0x94) from [<c03e1cc4>] (fimc_isp_subdev_s_power+0x13c/0x1f8)
[ 96.745000] [<c03e1cc4>] (fimc_isp_subdev_s_power+0x13c/0x1f8) from [<c03ed088>] (__subdev_set_power+0x70/0x84)
[ 96.745000] [<c03ed088>] (__subdev_set_power+0x70/0x84) from [<c03ed164>] (fimc_pipeline_s_power+0xc8/0x164)
[ 96.745000] [<c03ed164>] (fimc_pipeline_s_power+0xc8/0x164) from [<c03ee2b8>] (__fimc_pipeline_open+0x90/0x268)
[ 96.745000] [<c03ee2b8>] (__fimc_pipeline_open+0x90/0x268) from [<c03ec5f0>] (fimc_capture_open+0xe4/0x1ec)
[ 96.745000] [<c03ec5f0>] (fimc_capture_open+0xe4/0x1ec) from [<c03c5560>] (v4l2_open+0xa8/0xe4)
[ 96.745000] [<c03c5560>] (v4l2_open+0xa8/0xe4) from [<c0112900>] (chrdev_open+0x9c/0x158)
[ 96.745000] [<c0112900>] (chrdev_open+0x9c/0x158) from [<c010d3e0>] (do_dentry_open+0x1f4/0x27c)
[ 96.745000] [<c010d3e0>] (do_dentry_open+0x1f4/0x27c) from [<c010d558>] (finish_open+0x34/0x50)
[ 96.745000] [<c010d558>] (finish_open+0x34/0x50) from [<c011bea0>] (do_last+0x59c/0xbcc)
[ 96.745000] [<c011bea0>] (do_last+0x59c/0xbcc) from [<c011c580>] (path_openat+0xb0/0x484)
[ 96.745000] [<c011c580>] (path_openat+0xb0/0x484) from [<c011ca58>] (do_filp_open+0x30/0x84)
[ 96.745000] [<c011ca58>] (do_filp_open+0x30/0x84) from [<c010d060>] (do_sys_open+0xe8/0x170)
[ 96.745000] [<c010d060>] (do_sys_open+0xe8/0x170) from [<c000f040>] (ret_fast_syscall+0x0/0x30)
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Ensure there is no unbalanced pm_runtime_put().
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Due to hardware dependencies (clocks/power domain) the I2C bus
controller needs to be unregistered before fimc-is.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Ensure both debugfs: fimc_is directory and the fw_log file
are properly removed in the driver cleanup sequence.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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It's an I2C client driver and it must not overwrite the struct v4l2_subdev
dev_priv field, which is used by the v4l2 core to store a pointer to
struct i2c_client.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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More appropriate names for the ISP chain data structure.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Instead of incrementing p_region_num field each time we set a bit
in the parameter mask calculate the number of bits set only when
this information is needed.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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This patch adds a set of core files of the Exynos4x12 FIMC-IS
V4L2 driver. This includes main functionality like allocating
memory, loading the firmware, FIMC-IS register interface and
host CPU <-> IS command and error code definitions.
The driver currently exposes a single subdev named FIMC-IS-ISP,
which corresponds to the FIMC-IS ISP and DRC IP blocks.
The FIMC-IS-ISP subdev currently supports only a subset of user
controls. For other controls we need several extensions at the
V4L2 API. The supported standard controls are:
brightness, contrast, saturation, hue, sharpness, 3a_lock,
exposure_time_absolute, white_balance_auto_preset,
iso_sensitivity, iso_sensitivity_auto, exposure_metering_mode.
Signed-off-by: Younghwan Joo <yhwan.joo@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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