[PATCH 5/7] drm: adv7511: Add has_dsi feature bit to struct adv7511_chip_info

[Biju Das]

Hi Laurent,

Thanks for the feedback.

> Subject: Re: [PATCH 5/7] drm: adv7511: Add has_dsi feature bit to struct
> adv7511_chip_info
> 
> Hi Biju,
> 
> Thank you for the patch.
> 
> On Sun, Aug 13, 2023 at 07:05:10PM +0100, Biju Das wrote:
> > The ADV7533 and ADV7535 have DSI support. Add a feature bit has_dsi to
> > struct adv7511_chip_info for handling configuration related to DSI.
> >
> > Signed-off-by: Biju Das <biju.das.jz at bp.renesas.com>
> > ---
> >  drivers/gpu/drm/bridge/adv7511/adv7511.h     |  1 +
> >  drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 20
> > +++++++++++---------
> >  2 files changed, 12 insertions(+), 9 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h
> > b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> > index b29d11cae932..2a017bb31a14 100644
> > --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
> > +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> > @@ -339,6 +339,7 @@ struct adv7511_chip_info {
> >  	unsigned long max_lane_freq;
> >  	const char * const *supply_names;
> >  	unsigned int num_supplies;
> > +	unsigned has_dsi:1;
> 
> As you're not short of space here, I'd make this a bool.

OK, will use bool here.

> 
> >  };
> >
> >  struct adv7511 {
> > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> > b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> > index f6f15c1b0882..66b3f8fcf67d 100644
> > --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> > +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> > @@ -373,7 +373,7 @@ static void adv7511_power_on(struct adv7511 *adv7511)
> >  	 */
> >  	regcache_sync(adv7511->regmap);
> >
> > -	if (adv7511->info->type == ADV7533 || adv7511->info->type == ADV7535)
> > +	if (adv7511->info->has_dsi)
> >  		adv7533_dsi_power_on(adv7511);
> >  	adv7511->powered = true;
> >  }
> > @@ -397,7 +397,7 @@ static void __adv7511_power_off(struct adv7511
> > *adv7511)  static void adv7511_power_off(struct adv7511 *adv7511)  {
> >  	__adv7511_power_off(adv7511);
> > -	if (adv7511->info->type == ADV7533 || adv7511->info->type == ADV7535)
> > +	if (adv7511->info->has_dsi)
> >  		adv7533_dsi_power_off(adv7511);
> >  	adv7511->powered = false;
> >  }
> > @@ -786,7 +786,7 @@ static void adv7511_mode_set(struct adv7511 *adv7511,
> >  	else
> >  		low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
> >
> > -	if (adv7511->info->type == ADV7511)
> > +	if (!adv7511->info->has_dsi)
> 
> While this is functionally equivalent, is the register below really related
> to DSI ? If not, I'd rather not check the has_dsi field here but keep
> checking the type.

What creating a packed value for this hardware difference
as driver data?

 { 0xfb, 0x6, 0x1} and { 0x4a, 0xc, 2) packed as unsigned int
driver data low_refresh_data and we can get rid of this
if statement and depack it here.

> 
> >  		regmap_update_bits(adv7511->regmap, 0xfb,
> >  				   0x6, low_refresh_rate << 1);
> >  	else
> > @@ -921,7 +921,7 @@ static enum drm_mode_status
> > adv7511_bridge_mode_valid(struct drm_bridge *bridge,  {
> >  	struct adv7511 *adv = bridge_to_adv7511(bridge);
> >
> > -	if (adv->info->type == ADV7533 || adv->info->type == ADV7535)
> > +	if (adv->info->has_dsi)
> >  		return adv7533_mode_valid(adv, mode);
> >  	else
> >  		return adv7511_mode_valid(adv, mode); @@ -1086,7 +1086,7 @@
> static
> > int adv7511_init_cec_regmap(struct adv7511 *adv)
> >  		goto err;
> >  	}
> >
> > -	if (adv->info->type == ADV7533 || adv->info->type == ADV7535) {
> > +	if (adv->info->has_dsi) {
> 
> Same comment here, this doesn't seem logically right.

But this patching is applicable for DSI.


> 
> >  		ret = adv7533_patch_cec_registers(adv);
> >  		if (ret)
> >  			goto err;
> > @@ -1245,7 +1245,7 @@ static int adv7511_probe(struct i2c_client *i2c)
> >  		goto uninit_regulators;
> >  	dev_dbg(dev, "Rev. %d\n", val);
> >
> > -	if (info->type == ADV7511)
> > +	if (!info->has_dsi)
> 
> And here too.

Will create another bool. info->has_dpi, is it ok??

Cheers,
Biju

> 
> >  		ret = regmap_register_patch(adv7511->regmap,
> >  					    adv7511_fixed_registers,
> >  					    ARRAY_SIZE(adv7511_fixed_registers));
> > @@ -1316,7 +1316,7 @@ static int adv7511_probe(struct i2c_client *i2c)
> >
> >  	adv7511_audio_init(dev, adv7511);
> >
> > -	if (info->type == ADV7533 || info->type == ADV7535) {
> > +	if (info->has_dsi) {
> >  		ret = adv7533_attach_dsi(adv7511);
> >  		if (ret)
> >  			goto err_unregister_audio;
> > @@ -1370,7 +1370,8 @@ static const struct adv7511_chip_info
> adv7533_chip_info = {
> >  	.max_mode_clock = 80000,
> >  	.max_lane_freq = 800000,
> >  	.supply_names = adv7533_supply_names,
> > -	.num_supplies = ARRAY_SIZE(adv7533_supply_names)
> > +	.num_supplies = ARRAY_SIZE(adv7533_supply_names),
> > +	.has_dsi = 1
> >  };
> >
> >  static const struct adv7511_chip_info adv7535_chip_info = { @@
> > -1378,7 +1379,8 @@ static const struct adv7511_chip_info
> adv7535_chip_info = {
> >  	.max_mode_clock = 148500,
> >  	.max_lane_freq = 891000,
> >  	.supply_names = adv7533_supply_names,
> > -	.num_supplies = ARRAY_SIZE(adv7533_supply_names)
> > +	.num_supplies = ARRAY_SIZE(adv7533_supply_names),
> > +	.has_dsi = 1
> >  };
> >
> >  static const struct i2c_device_id adv7511_i2c_ids[] = {
> 
> --
> Regards,
> 
> Laurent Pinchart