Re: [PATCH v2 2/2] drm: bridge: adv7511: Add support for ADV7535

["Togorean, Bogdan" <Bogdan.Togorean@analog.com>]

Thank you Sam for review,

On Fri, 2019-08-09 at 17:25 +0200, Sam Ravnborg wrote:
> [External]
> 
> Hi Bogdan.
> 
> This patch triggered a few general comments.
> 
> > --- a/drivers/gpu/drm/bridge/adv7511/Makefile
> > +++ b/drivers/gpu/drm/bridge/adv7511/Makefile
> > @@ -2,5 +2,5 @@
> >  adv7511-y := adv7511_drv.o
> >  adv7511-$(CONFIG_DRM_I2C_ADV7511_AUDIO) += adv7511_audio.o
> >  adv7511-$(CONFIG_DRM_I2C_ADV7511_CEC) += adv7511_cec.o
> > -adv7511-$(CONFIG_DRM_I2C_ADV7533) += adv7533.o
> > +adv7511-$(CONFIG_DRM_I2C_ADV753x) += adv7533.o
> >  obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511.o
> > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h
> > b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> > index 52b2adfdc877..38288c3c3c53 100644
> > --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
> > +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
> > @@ -91,6 +91,7 @@
> >  #define ADV7511_REG_ARC_CTRL			0xdf
> >  #define ADV7511_REG_CEC_I2C_ADDR		0xe1
> >  #define ADV7511_REG_CEC_CTRL			0xe2
> > +#define ADV7511_REG_SUPPLY_SELECT		0xe4
> >  #define ADV7511_REG_CHIP_ID_HIGH		0xf5
> >  #define ADV7511_REG_CHIP_ID_LOW			0xf6
> >  
> > @@ -320,6 +321,7 @@ struct adv7511_video_config {
> >  enum adv7511_type {
> >  	ADV7511,
> >  	ADV7533,
> > +	ADV7535,
> >  };
> >  
> >  #define ADV7511_MAX_ADDRS 3
> > @@ -393,7 +395,7 @@ static inline int adv7511_cec_init(struct
> > device *dev, struct adv7511 *adv7511)
> >  }
> >  #endif
> >  
> > -#ifdef CONFIG_DRM_I2C_ADV7533
> > +#ifdef CONFIG_DRM_I2C_ADV753x
> >  void adv7533_dsi_power_on(struct adv7511 *adv);
> >  void adv7533_dsi_power_off(struct adv7511 *adv);
> >  void adv7533_mode_set(struct adv7511 *adv, const struct
> > drm_display_mode *mode);
> 
> The else part here define dummy functions.
> 
> > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> > b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> > index f6d2681f6927..b1501344df3e 100644
> > --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> > +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> > @@ -367,7 +367,7 @@ static void adv7511_power_on(struct adv7511
> > *adv7511)
> >  	 */
> >  	regcache_sync(adv7511->regmap);
> >  
> > -	if (adv7511->type == ADV7533)
> > +	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
> >  		adv7533_dsi_power_on(adv7511);
> 
> In the driver we check for adv7511->type - and call
> adv7533_dsi_power_on() only for the two types where we have this
> function defined.
> A simpler approach would be to always call adv7533_dsi_power_on(),
> and
> let the existing logic pick up the right version.
> The dummy version should then return 0 to say OK.
> 
> Same goes for several places below.
> 
I agree with your remarks. Will implement them in v3
> 
> >  	adv7511->powered = true;
> >  }
> > @@ -387,7 +387,7 @@ static void __adv7511_power_off(struct adv7511
> > *adv7511)
> >  static void adv7511_power_off(struct adv7511 *adv7511)
> >  {
> >  	__adv7511_power_off(adv7511);
> > -	if (adv7511->type == ADV7533)
> > +	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
> >  		adv7533_dsi_power_off(adv7511);
> >  	adv7511->powered = false;
> >  }
> > @@ -761,7 +761,7 @@ static void adv7511_mode_set(struct adv7511
> > *adv7511,
> >  	regmap_update_bits(adv7511->regmap, 0x17,
> >  		0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
> >  
> > -	if (adv7511->type == ADV7533)
> > +	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
> >  		adv7533_mode_set(adv7511, adj_mode);
> >  
> >  	drm_mode_copy(&adv7511->curr_mode, adj_mode);
> > @@ -874,7 +874,7 @@ static int adv7511_bridge_attach(struct
> > drm_bridge *bridge)
> >  				 &adv7511_connector_helper_funcs);
> >  	drm_connector_attach_encoder(&adv->connector, bridge->encoder);
> >  
> > -	if (adv->type == ADV7533)
> > +	if (adv->type == ADV7533 || adv->type == ADV7535)
> >  		ret = adv7533_attach_dsi(adv);
> >  
> >  	if (adv->i2c_main->irq)
> > @@ -903,6 +903,7 @@ static const char * const
> > adv7511_supply_names[] = {
> >  	"dvdd-3v",
> >  };
> >  
> > +/* The order of entries is important. If changed update hardcoded
> > indices */
> >  static const char * const adv7533_supply_names[] = {
> >  	"avdd",
> >  	"dvdd",
> > @@ -952,7 +953,7 @@ static bool
> > adv7511_cec_register_volatile(struct device *dev, unsigned int reg)
> >  	struct i2c_client *i2c = to_i2c_client(dev);
> >  	struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
> >  
> > -	if (adv7511->type == ADV7533)
> > +	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
> >  		reg -= ADV7533_REG_CEC_OFFSET;
> >  
> >  	switch (reg) {
> > @@ -994,7 +995,7 @@ static int adv7511_init_cec_regmap(struct
> > adv7511 *adv)
> >  		goto err;
> >  	}
> >  
> > -	if (adv->type == ADV7533) {
> > +	if (adv->type == ADV7533 || adv->type == ADV7535) {
> >  		ret = adv7533_patch_cec_registers(adv);
> >  		if (ret)
> >  			goto err;
> > @@ -1094,8 +1095,9 @@ static int adv7511_probe(struct i2c_client
> > *i2c, const struct i2c_device_id *id)
> >  	struct adv7511_link_config link_config;
> >  	struct adv7511 *adv7511;
> >  	struct device *dev = &i2c->dev;
> > +	struct regulator *reg_v1p2;
> >  	unsigned int val;
> > -	int ret;
> > +	int ret, reg_v1p2_uV;
> >  
> >  	if (!dev->of_node)
> >  		return -EINVAL;
> > @@ -1163,6 +1165,16 @@ static int adv7511_probe(struct i2c_client
> > *i2c, const struct i2c_device_id *id)
> >  	if (ret)
> >  		goto uninit_regulators;
> >  
> > +	if (adv7511->type == ADV7533) {
> > +		reg_v1p2 = adv7511->supplies[5].consumer;
> > +		reg_v1p2_uV = regulator_get_voltage(reg_v1p2);
> > +
> > +		if (reg_v1p2_uV == 1200000) {
> > +			regmap_update_bits(adv7511->regmap,
> > +				ADV7511_REG_SUPPLY_SELECT, 0x80, 0x80);
> > +		}
> > +	}
> > +
> >  	adv7511_packet_disable(adv7511, 0xffff);
> >  
> >  	adv7511->i2c_edid = i2c_new_secondary_device(i2c, "edid",
> > @@ -1242,7 +1254,7 @@ static int adv7511_remove(struct i2c_client
> > *i2c)
> >  {
> >  	struct adv7511 *adv7511 = i2c_get_clientdata(i2c);
> >  
> > -	if (adv7511->type == ADV7533)
> > +	if (adv7511->type == ADV7533 || adv7511->type == ADV7535)
> >  		adv7533_detach_dsi(adv7511);
> >  	i2c_unregister_device(adv7511->i2c_cec);
> >  	if (adv7511->cec_clk)
> > @@ -1266,8 +1278,9 @@ static const struct i2c_device_id
> > adv7511_i2c_ids[] = {
> >  	{ "adv7511", ADV7511 },
> >  	{ "adv7511w", ADV7511 },
> >  	{ "adv7513", ADV7511 },
> > -#ifdef CONFIG_DRM_I2C_ADV7533
> > +#ifdef CONFIG_DRM_I2C_ADV753x
> >  	{ "adv7533", ADV7533 },
> > +	{ "adv7535", ADV7535 },
> >  #endif
> 
> This ifdef may not be needed??
> If we did not get this type we will not look it up.
But if we have defined in DT adv7533/5 device but
CONFIG_DRM_I2C_ADV753x not selected probe will fail with ENODEV. That
would be ok?
> 
> >  	{ }
> >  };
> > @@ -1277,8 +1290,9 @@ static const struct of_device_id
> > adv7511_of_ids[] = {
> >  	{ .compatible = "adi,adv7511", .data = (void *)ADV7511 },
> >  	{ .compatible = "adi,adv7511w", .data = (void *)ADV7511 },
> >  	{ .compatible = "adi,adv7513", .data = (void *)ADV7511 },
> > -#ifdef CONFIG_DRM_I2C_ADV7533
> > +#ifdef CONFIG_DRM_I2C_ADV753x
> >  	{ .compatible = "adi,adv7533", .data = (void *)ADV7533 },
> > +	{ .compatible = "adi,adv7535", .data = (void *)ADV7535 },
> >  #endif
> >  	{ }
> >  };
> 
> 	Sam