Hi, Doug
Thanks for the review.
I fixed the nits you pointed out in v3.
PTAL.
On Mon, Sep 13, 2021 at 5:32 PM Doug Anderson <dianders@xxxxxxxxxxxx> wrote:
>
> Hi,
>
> On Mon, Sep 13, 2021 at 2:33 PM Philip Chen <philipchen@xxxxxxxxxxxx> wrote:
> >
> > diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c
> > index 685e9c38b2db..1b2414601538 100644
> > --- a/drivers/gpu/drm/bridge/parade-ps8640.c
> > +++ b/drivers/gpu/drm/bridge/parade-ps8640.c
> > @@ -9,6 +9,7 @@
> > #include <linux/i2c.h>
> > #include <linux/module.h>
> > #include <linux/of_graph.h>
> > +#include <linux/regmap.h>
> > #include <linux/regulator/consumer.h>
> >
> > #include <drm/drm_bridge.h>
> > @@ -31,6 +32,11 @@
> >
> > #define NUM_MIPI_LANES 4
> >
> > +#define COMMON_PS8640_REGMAP_CONFIG \
> > + .reg_bits = 8, \
> > + .val_bits = 8, \
> > + .cache_type = REGCACHE_NONE
>
> At some point we should see if we get any speed gains by actually
> caching, but that could be done later and isn't terribly high
> priority.
>
>
> > +
> > /*
> > * PS8640 uses multiple addresses:
> > * page[0]: for DP control
> > @@ -64,12 +70,48 @@ struct ps8640 {
> > struct drm_bridge *panel_bridge;
> > struct mipi_dsi_device *dsi;
> > struct i2c_client *page[MAX_DEVS];
> > + struct regmap *regmap[MAX_DEVS];
> > struct regulator_bulk_data supplies[2];
> > struct gpio_desc *gpio_reset;
> > struct gpio_desc *gpio_powerdown;
> > bool powered;
> > };
> >
> > +static const struct regmap_config ps8640_regmap_config[] = {
> > + [PAGE0_DP_CNTL] = {
> > + COMMON_PS8640_REGMAP_CONFIG,
> > + .max_register = 0xbf
> > + },
> > + [PAGE1_VDO_BDG] = {
> > + COMMON_PS8640_REGMAP_CONFIG,
> > + .max_register = 0xff
> > + },
> > + [PAGE2_TOP_CNTL] = {
> > + COMMON_PS8640_REGMAP_CONFIG,
> > + .max_register = 0xff
> > + },
> > + [PAGE3_DSI_CNTL1] = {
> > + COMMON_PS8640_REGMAP_CONFIG,
> > + .max_register = 0xff
> > + },
> > + [PAGE4_MIPI_PHY] = {
> > + COMMON_PS8640_REGMAP_CONFIG,
> > + .max_register = 0xff
> > + },
> > + [PAGE5_VPLL] = {
> > + COMMON_PS8640_REGMAP_CONFIG,
> > + .max_register = 0x7f
> > + },
> > + [PAGE6_DSI_CNTL2] = {
> > + COMMON_PS8640_REGMAP_CONFIG,
> > + .max_register = 0xff
> > + },
> > + [PAGE7_SPI_CNTL] = {
> > + COMMON_PS8640_REGMAP_CONFIG,
> > + .max_register = 0xff
> > + }
>
> nit: stylistically it's nice to add a "," after the last brace too.
> It's not technically needed but it makes diffs cleaner if another
> config is later added.
>
>
> > @@ -362,6 +390,10 @@ static int ps8640_probe(struct i2c_client *client)
> >
> > ps_bridge->page[PAGE0_DP_CNTL] = client;
> >
> > + ps_bridge->regmap[PAGE0_DP_CNTL] = devm_regmap_init_i2c(client, ps8640_regmap_config);
> > + if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]))
> > + return PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]);
>
> I'm a huge fan of dev_err_probe(). I wonder if it makes sense to use
> it here? Untested:
>
> if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]))
> return dev_err_probe(dev, PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]),
> "Error initting page 0 regmap\n");
>
>
> All of that is just nits, so:
>
> Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
