Re: [PATCH 2/2] media: v4l: xilinx: Add Xilinx UHD-SDI Rx Subsystem driver

[Joe Perches]

On Thu, 2019-06-13 at 15:05 -0700, Hyun Kwon wrote:
> On Tue, 2019-06-04 at 06:55:56 -0700, Vishal Sagar wrote:

trivia:

> > diff --git a/drivers/media/platform/xilinx/xilinx-sdirxss.c b/drivers/media/platform/xilinx/xilinx-sdirxss.c
[]
> > +static int xsdirx_get_stream_properties(struct xsdirxss_state *state)
> > +{
[]
> > +	if (valid & XSDIRX_ST352_VALID_DS1_MASK) {
> > +		payload = xsdirxss_read(core, XSDIRX_ST352_DS1_REG);
> > +		byte1 = (payload >> XST352_PAYLOAD_BYTE1_SHIFT) &
> > +				XST352_PAYLOAD_BYTE_MASK;

Is XST352_PAYLOAD_BYTE_MASK correct ?
Should it be XST352_PAYLOAD_BYTE1_MASK ?

> > +		active_luma = (payload & XST352_BYTE3_ACT_LUMA_COUNT_MASK) >>
> > +				XST352_BYTE3_ACT_LUMA_COUNT_OFFSET;
> > +		pic_type = (payload & XST352_BYTE2_PIC_TYPE_MASK) >>
> > +				XST352_BYTE2_PIC_TYPE_OFFSET;
> > +		framerate = (payload >> XST352_BYTE2_FPS_SHIFT) &
> > +				XST352_BYTE2_FPS_MASK;
> > +		tscan = (payload & XST352_BYTE2_TS_TYPE_MASK) >>
> > +				XST352_BYTE2_TS_TYPE_OFFSET;
> 
> Please align consistently throughout the patch. I believe the checkpatch
> --strict warns on these.

I believe not.

Another possibility would be to use a macro like:

#define mask_and_shift(val, type)	\
	((val) & (XST352_ ## type ## _MASK)) >> (XST352_ ## type ## _OFFSET))

> > +		sampling = (payload & XST352_BYTE3_COLOR_FORMAT_MASK) >>
> > +			   XST352_BYTE3_COLOR_FORMAT_OFFSET;

So these could be something like:

		sampling = mask_and_shift(payload, BYTE3_COLOR_FORMAT);