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Message-ID:
<TY3PR01MB113469DE26038F53246FDCF6686892@TY3PR01MB11346.jpnprd01.prod.outlook.com>
Date: Sat, 24 Aug 2024 16:11:49 +0000
From: Biju Das <biju.das.jz@...renesas.com>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>, Jacopo Mondi
<jacopo.mondi@...asonboard.com>
CC: Sakari Ailus <sakari.ailus@...ux.intel.com>, Mauro Carvalho Chehab
<mchehab@...nel.org>, "linux-media@...r.kernel.org"
<linux-media@...r.kernel.org>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, biju.das.au <biju.das.au@...il.com>, Andy
Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: RE: [PATCH 1/2] media: mt9p031: Extend match support for OF tables
Hi Laurent,
> -----Original Message-----
> From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Sent: Saturday, August 24, 2024 4:57 PM
> To: Jacopo Mondi <jacopo.mondi@...asonboard.com>
> Cc: Biju Das <biju.das.jz@...renesas.com>; Sakari Ailus <sakari.ailus@...ux.intel.com>; Mauro Carvalho
> Chehab <mchehab@...nel.org>; linux-media@...r.kernel.org; linux-kernel@...r.kernel.org; biju.das.au
> <biju.das.au@...il.com>; Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Subject: Re: [PATCH 1/2] media: mt9p031: Extend match support for OF tables
>
> On Sat, Aug 24, 2024 at 06:55:19PM +0300, Laurent Pinchart wrote:
> > On Fri, Aug 23, 2024 at 06:55:04PM +0300, Laurent Pinchart wrote:
> > > Hello,
> > >
> > > On Mon, Sep 11, 2023 at 11:25:03AM +0200, Jacopo Mondi wrote:
> > > > On Mon, Sep 11, 2023 at 09:14:35AM +0000, Biju Das wrote:
> > > > > > Subject: Re: [PATCH 1/2] media: mt9p031: Extend match support
> > > > > > for OF tables
> > > > > >
> > > > > > Hi Biju
> > > > > >
> > > > > > On Sun, Sep 10, 2023 at 05:01:25PM +0100, Biju Das wrote:
> > > > > > > The driver has an OF match table, still, it uses an ID
> > > > > > > lookup table for retrieving match data. Currently, the
> > > > > > > driver is working on the assumption that an I2C device
> > > > > > > registered via OF will always match a legacy I2C device ID.
> > > > > > > The correct approach is to have an OF device ID table using i2c_get_match_data() if the
> devices are registered via OF/ID.
> > > > > > >
> > > > > > > Unify the OF/ID table by using MEDIA_BUS_FMT as match data
> > > > > > > for both these tables and replace the ID lookup table for
> > > > > > > the match data by
> > > > > > > i2c_get_match_data() and simplifly probe() and
> > > > > > > mt9p031_init_cfg()
> > > > > > >
> > > > > > > Drop mt9p031_init_cfg as there is no user.
> > > > > > >
>
> I'll drop this sentence when applying.
OK for me.
Thanks,
Biju
>
> > > > > > > While at it, remove the trailing comma in the terminator
> > > > > > > entry for the OF table making code robust against
> > > > > > > (theoretical) misrebases or other similar things where the
> > > > > > > new entry goes _after_ the termination without the compiler noticing.
> > > > > > >
> > > > > > > Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> > > > > > > ---
> > > > > > > drivers/media/i2c/mt9p031.c | 33
> > > > > > > +++++++++++----------------------
> > > > > > > 1 file changed, 11 insertions(+), 22 deletions(-)
> > > > > > >
> > > > > > > diff --git a/drivers/media/i2c/mt9p031.c
> > > > > > > b/drivers/media/i2c/mt9p031.c index
> > > > > > > 348f1e1098fb..540cb519915c 100644
> > > > > > > --- a/drivers/media/i2c/mt9p031.c
> > > > > > > +++ b/drivers/media/i2c/mt9p031.c
> > > > > > > @@ -112,11 +112,6 @@
> > > > > > > #define MT9P031_TEST_PATTERN_RED 0xa2
> > > > > > > #define MT9P031_TEST_PATTERN_BLUE 0xa3
> > > > > > >
> > > > > > > -enum mt9p031_model {
> > > > > > > - MT9P031_MODEL_COLOR,
> > > > > > > - MT9P031_MODEL_MONOCHROME,
> > > > > > > -};
> > > > > > > -
> > > > > > > struct mt9p031 {
> > > > > > > struct v4l2_subdev subdev;
> > > > > > > struct media_pad pad;
> > > > > > > @@ -129,7 +124,7 @@ struct mt9p031 {
> > > > > > > struct clk *clk;
> > > > > > > struct regulator_bulk_data regulators[3];
> > > > > > >
> > > > > > > - enum mt9p031_model model;
> > > > > > > + u32 code;
> > > > > > > struct aptina_pll pll;
> > > > > > > unsigned int clk_div;
> > > > > > > bool use_pll;
> > > > > > > @@ -714,12 +709,7 @@ static int mt9p031_init_cfg(struct v4l2_subdev *subdev,
> > > > > > > crop->height = MT9P031_WINDOW_HEIGHT_DEF;
> > > > > > >
> > > > > > > format = __mt9p031_get_pad_format(mt9p031, sd_state, 0,
> > > > > > > which);
> > > > > > > -
> > > > > > > - if (mt9p031->model == MT9P031_MODEL_MONOCHROME)
> > > > > > > - format->code = MEDIA_BUS_FMT_Y12_1X12;
> > > > > > > - else
> > > > > > > - format->code = MEDIA_BUS_FMT_SGRBG12_1X12;
> > > > > > > -
> > > > > > > + format->code = mt9p031->code;
> > > > > > > format->width = MT9P031_WINDOW_WIDTH_DEF;
> > > > > > > format->height = MT9P031_WINDOW_HEIGHT_DEF;
> > > > > > > format->field = V4L2_FIELD_NONE; @@ -1104,7 +1094,6 @@
> > > > > > > mt9p031_get_pdata(struct i2c_client *client)
> > > > > > >
> > > > > > > static int mt9p031_probe(struct i2c_client *client) {
> > > > > > > - const struct i2c_device_id *did = i2c_client_get_device_id(client);
> > > > > > > struct mt9p031_platform_data *pdata = mt9p031_get_pdata(client);
> > > > > > > struct i2c_adapter *adapter = client->adapter;
> > > > > > > struct mt9p031 *mt9p031;
> > > > > > > @@ -1129,7 +1118,7 @@ static int mt9p031_probe(struct i2c_client *client)
> > > > > > > mt9p031->pdata = pdata;
> > > > > > > mt9p031->output_control = MT9P031_OUTPUT_CONTROL_DEF;
> > > > > > > mt9p031->mode2 = MT9P031_READ_MODE_2_ROW_BLC;
> > > > > > > - mt9p031->model = did->driver_data;
> > > > > > > + mt9p031->code = (uintptr_t)i2c_get_match_data(client);
> > > > > > >
> > > > > > > mt9p031->regulators[0].supply = "vdd";
> > > > > > > mt9p031->regulators[1].supply = "vdd_io"; @@ -1226,19
> > > > > > > +1215,19 @@ static void mt9p031_remove(struct i2c_client
> > > > > > > *client) }
> > > > > > >
> > > > > > > static const struct i2c_device_id mt9p031_id[] = {
> > > > > > > - { "mt9p006", MT9P031_MODEL_COLOR },
> > > > > > > - { "mt9p031", MT9P031_MODEL_COLOR },
> > > > > > > - { "mt9p031m", MT9P031_MODEL_MONOCHROME },
> > > > > > > - { }
> > > > > > > + { "mt9p006", MEDIA_BUS_FMT_SGRBG12_1X12 },
> > > > > > > + { "mt9p031", MEDIA_BUS_FMT_SGRBG12_1X12 },
> > > > > > > + { "mt9p031m", MEDIA_BUS_FMT_Y12_1X12 },
> > > > > > > + { /* sentinel */ }
> > > > > > > };
> > > > > > > MODULE_DEVICE_TABLE(i2c, mt9p031_id);
> > > > > > >
> > > > > > > #if IS_ENABLED(CONFIG_OF)
> > > > > > > static const struct of_device_id mt9p031_of_match[] = {
> > > > > > > - { .compatible = "aptina,mt9p006", },
> > > > > > > - { .compatible = "aptina,mt9p031", },
> > > > > > > - { .compatible = "aptina,mt9p031m", },
> > > > > > > - { /* sentinel */ },
> > > > > > > + { .compatible = "aptina,mt9p006", .data = (void *)MEDIA_BUS_FMT_SGRBG12_1X12 },
> > > > > > > + { .compatible = "aptina,mt9p031", .data = (void *)MEDIA_BUS_FMT_SGRBG12_1X12 },
> > > > > > > + { .compatible = "aptina,mt9p031m", .data = (void *)MEDIA_BUS_FMT_Y12_1X12 },
> > > > > > > + { /* sentinel */ }
> > > > > >
> > > > > > I know it might sound not necessary, but isn't it better to
> > > > > > wrap the format in some sort of per-model structure. It would
> > > > > > avoid a few type casts too. Up to you though
> > > > >
> > > > > The problem with structure is, it will have one variable entry.
> > > > > I got some feedback related to similar patches not to add a
> > > > > single variable to structure and use the value directly instead.
> > > >
> > > > Ok then, a matter of preferences I think. Up to you, really.
> > >
> > > My preference actually goes for a structure too.
> > >
> > > Given how long it took me to review this, I'll send a v2 of the
> > > series myself.
> >
> > Actually it will be simpler to apply this series first and add changes
> > on top.
> >
> > Reviewed-by: Laurent Pinchart
> > <laurent.pinchart+renesas@...asonboard.com>
> >
> > > > > > > };
> > > > > > > MODULE_DEVICE_TABLE(of, mt9p031_of_match); #endif
>
> --
> Regards,
>
> Laurent Pinchart
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