Re: [PATCH v3 07/12] media: imx8mq-mipi-csi2: Add imx8mq_plat_data for different compatible strings

Laurent Pinchart
2025-03-28T08:56:32Z

On Fri, Mar 28, 2025 at 10:35:44AM +0200, Daniel Baluta wrote:
> On Mon, Feb 10, 2025 at 11:02 PM Frank Li <Frank.Li@nxp.com> wrote:
> >
> > From: "Guoniu.zhou" <guoniu.zhou@nxp.com>
> >
> > Introduce `imx8mq_plat_data` along with enable/disable callback operations
> > to facilitate support for new chips. No functional changes.
> >
> > Signed-off-by: Guoniu.zhou <guoniu.zhou@nxp.com>
> > Signed-off-by: Frank Li <Frank.Li@nxp.com>
> > ---
> > Change from v2 to v3
> > - none
> > change from v1 to v2
> > - remove internal review tags
> > ---
> > drivers/media/platform/nxp/imx8mq-mipi-csi2.c | 60 ++++++++++++++++++++-------
> > 1 file changed, 46 insertions(+), 14 deletions(-)
> >
> > diff --git a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> > index 1f2657cf6e824..b5eae56d92f49 100644
> > --- a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> > +++ b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c
> > @@ -62,6 +62,8 @@
> > #define CSI2RX_CFG_VID_P_FIFO_SEND_LEVEL 0x188
> > #define CSI2RX_CFG_DISABLE_PAYLOAD_1 0x130
> >
> > +struct csi_state;
> > +
> > enum {
> > ST_POWERED = 1,
> > ST_STREAMING = 2,
> > @@ -83,11 +85,11 @@ static const char * const imx8mq_mipi_csi_clk_id[CSI2_NUM_CLKS] = {
> >
> > #define CSI2_NUM_CLKS ARRAY_SIZE(imx8mq_mipi_csi_clk_id)
> >
> > -#define GPR_CSI2_1_RX_ENABLE BIT(13)
> > -#define GPR_CSI2_1_VID_INTFC_ENB BIT(12)
> > -#define GPR_CSI2_1_HSEL BIT(10)
> > -#define GPR_CSI2_1_CONT_CLK_MODE BIT(8)
> > -#define GPR_CSI2_1_S_PRG_RXHS_SETTLE(x) (((x) & 0x3f) << 2)
> > +struct imx8mq_plat_data {
> > + const char *name;
> > + int (*enable)(struct csi_state *state, u32 hs_settle);
> > + void (*disable)(struct csi_state *state);
> > +};
> >
> > /*
> > * The send level configures the number of entries that must accumulate in
> > @@ -106,6 +108,7 @@ static const char * const imx8mq_mipi_csi_clk_id[CSI2_NUM_CLKS] = {
> >
> > struct csi_state {
> > struct device *dev;
> > + const struct imx8mq_plat_data *pdata;
> > void __iomem *regs;
> > struct clk_bulk_data clks[CSI2_NUM_CLKS];
> > struct reset_control *rst;
> > @@ -137,6 +140,35 @@ struct csi2_pix_format {
> > u8 width;
> > };
> >
> > +/* -----------------------------------------------------------------------------
>
> I would drop this line. It doesn't make code easier to read.

I personally find that clear section markers make the code easier to
read. It's a personal preference though, so I leave it to individual
driver maintainers, and aim for consistency within drivers.

> > + * i.MX8MQ GPR
> > + */
>
> Just say: /* i.MX8MQ GPR */
>
> This pattern happens in a lot of places.

--
Regards,

Laurent Pinchart