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SubjectRe: [PATCH v3 2/2] media: atmel: atmel-sama5d2-isc: fixed checkpatch warnings
Hi Eugen,

On Thu, Jun 06, 2019 at 07:43:47AM +0000, Eugen.Hristev@microchip.com wrote:
> From: Eugen Hristev <eugen.hristev@microchip.com>
>
> Checkpatch complaining that locks do not have comments,
> unaligned code and macro reuse of same argument in to_isc_clk.
> Fixed them by renaming, realigning and adding struct comments
>
> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
> ---
> Changes in v3:
> - new patch, addresses the checkpatch issues that Hans asked to fix
>
> drivers/media/platform/atmel/atmel-isc.h | 51 +++++++++++++++++++++---
> drivers/media/platform/atmel/atmel-sama5d2-isc.c | 4 +-
> 2 files changed, 48 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/media/platform/atmel/atmel-isc.h b/drivers/media/platform/atmel/atmel-isc.h
> index 0bd5dff..6ff9fa8 100644
> --- a/drivers/media/platform/atmel/atmel-isc.h
> +++ b/drivers/media/platform/atmel/atmel-isc.h
> @@ -24,14 +24,14 @@ struct isc_clk {
> struct clk_hw hw;
> struct clk *clk;
> struct regmap *regmap;
> - spinlock_t lock;
> + spinlock_t lock; /* synchronize access to clock registers */

You probably want to serialise the access, not synchronise it (i.e. happen
at the same time). So, s/synchronise/serialise/ ?

Same on the isc_device fields below.

With that,

Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>

> u8 id;
> u8 parent_id;
> u32 div;
> struct device *dev;
> };
>
> -#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw)
> +#define to_isc_clk(v) container_of(v, struct isc_clk, hw)
>
> struct isc_buffer {
> struct vb2_v4l2_buffer vb;
> @@ -146,6 +146,47 @@ struct isc_ctrls {
>
> #define ISC_PIPE_LINE_NODE_NUM 11
>
> +/*
> + * struct isc_device - ISC device driver data/config struct
> + * @regmap: Register map
> + * @hclock: Hclock clock input (refer datasheet)
> + * @ispck: iscpck clock (refer datasheet)
> + * @isc_clks: ISC clocks
> + *
> + * @dev: Registered device driver
> + * @v4l2_dev: v4l2 registered device
> + * @video_dev: registered video device
> + *
> + * @vb2_vidq: video buffer 2 video queue
> + * @dma_queue_lock: lock to synchronize the dma buffer queue
> + * @dma_queue: the queue for dma buffers
> + * @cur_frm: current isc frame/buffer
> + * @sequence: current frame number
> + * @stop: true if isc is not streaming, false if streaming
> + * @comp: completion reference that signals frame completion
> + *
> + * @fmt: current v42l format
> + * @user_formats: list of formats that are supported and agreed with sd
> + * @num_user_formats: how many formats are in user_formats
> + *
> + * @config: current ISC format configuration
> + * @try_config: the current ISC try format , not yet activated
> + *
> + * @ctrls: holds information about ISC controls
> + * @do_wb_ctrl: control regarding the DO_WHITE_BALANCE button
> + * @awb_work: workqueue reference for autowhitebalance histogram
> + * analysis
> + *
> + * @lock: lock for synchronizing userspace file operations
> + * with ISC operations
> + * @awb_lock: lock for synchronizing awb work queue operations
> + * with DMA/buffer operations
> + *
> + * @pipeline: configuration of the ISC pipeline
> + *
> + * @current_subdev: current subdevice: the sensor
> + * @subdev_entities: list of subdevice entitites
> + */
> struct isc_device {
> struct regmap *regmap;
> struct clk *hclock;
> @@ -157,7 +198,7 @@ struct isc_device {
> struct video_device video_dev;
>
> struct vb2_queue vb2_vidq;
> - spinlock_t dma_queue_lock;
> + spinlock_t dma_queue_lock; /* sync access to dma queue */
> struct list_head dma_queue;
> struct isc_buffer *cur_frm;
> unsigned int sequence;
> @@ -175,8 +216,8 @@ struct isc_device {
> struct v4l2_ctrl *do_wb_ctrl;
> struct work_struct awb_work;
>
> - struct mutex lock;
> - spinlock_t awb_lock;
> + struct mutex lock; /* sync access to file operations */
> + spinlock_t awb_lock; /* sync access to DMA buffers from awb work queue */
>
> struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM];
>
> diff --git a/drivers/media/platform/atmel/atmel-sama5d2-isc.c b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> index 69faaaf..299243f 100644
> --- a/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> +++ b/drivers/media/platform/atmel/atmel-sama5d2-isc.c
> @@ -87,8 +87,8 @@ static int isc_parse_dt(struct device *dev, struct isc_device *isc)
> break;
> }
>
> - subdev_entity = devm_kzalloc(dev,
> - sizeof(*subdev_entity), GFP_KERNEL);
> + subdev_entity = devm_kzalloc(dev, sizeof(*subdev_entity),
> + GFP_KERNEL);
> if (!subdev_entity) {
> of_node_put(rem);
> ret = -ENOMEM;
> --
> 2.7.4
>

--
Sakari Ailus

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