Re: [PATCH v3 5/5] drm: adv7511: Add support for i2c_new_secondary_device

Kieran Bingham
2018-02-13T14:23:48Z

Hi Laurent,

Thanks for the review,

On 13/02/18 12:23, Laurent Pinchart wrote:
> Hi Kieran,
>
> Thank you for the patch.
>
> On Tuesday, 13 February 2018 00:07:53 EET Kieran Bingham wrote:
>> From: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>>
>> The ADV7511 has four 256-byte maps that can be accessed via the main I²C
>> ports. Each map has it own I²C address and acts as a standard slave
>> device on the I²C bus.
>>
>> Allow a device tree node to override the default addresses so that
>> address conflicts with other devices on the same bus may be resolved at
>> the board description level.
>>
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
>> ---
>> v2:
>> - Update missing edid-i2c address setting
>> - Split out DT bindings
>> - Rename and move the I2C default addresses to their own section
>>
>> drivers/gpu/drm/bridge/adv7511/adv7511.h | 6 ++++
>> drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 42 ++++++++++++++++--------
>> 2 files changed, 33 insertions(+), 15 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h
>> b/drivers/gpu/drm/bridge/adv7511/adv7511.h index d034b2cb5eee..04e6759ee45b
>> 100644
>> --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h
>> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h
>> @@ -93,6 +93,11 @@
>> #define ADV7511_REG_CHIP_ID_HIGH 0xf5
>> #define ADV7511_REG_CHIP_ID_LOW 0xf6
>>
>> +/* Hardware defined default addresses for i2c register maps */
>
> s/i2c/I2C/ ? That's really because I had to find something :-)

The I²C comes from JMH's original patch, but is much harder to grep for, so
normalising to I2C throughout.

>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com
Collected, Thanks,
--
Kieran

>
>> +#define ADV7511_CEC_I2C_ADDR_DEFAULT 0x3c
>> +#define ADV7511_EDID_I2C_ADDR_DEFAULT 0x3f
>> +#define ADV7511_PACKET_I2C_ADDR_DEFAULT 0x38
>> +
>> #define ADV7511_CSC_ENABLE BIT(7)
>> #define ADV7511_CSC_UPDATE_MODE BIT(5)
>>
>> @@ -322,6 +327,7 @@ struct adv7511 {
>> struct i2c_client *i2c_main;
>> struct i2c_client *i2c_edid;
>> struct i2c_client *i2c_cec;
>> + struct i2c_client *i2c_packet;
>>
>> struct regmap *regmap;
>> struct regmap *regmap_cec;
>> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>> b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index
>> efa29db5fc2b..5e61b928c9c0 100644
>> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
>> @@ -586,7 +586,7 @@ static int adv7511_get_modes(struct adv7511 *adv7511,
>> /* Reading the EDID only works if the device is powered */
>> if (!adv7511->powered) {
>> unsigned int edid_i2c_addr =
>> - (adv7511->i2c_main->addr << 1) + 4;
>> + (adv7511->i2c_edid->addr << 1);
>>
>> __adv7511_power_on(adv7511);
>>
>> @@ -969,10 +969,10 @@ static int adv7511_init_cec_regmap(struct adv7511
>> *adv) {
>> int ret;
>>
>> - adv->i2c_cec = i2c_new_dummy(adv->i2c_main->adapter,
>> - adv->i2c_main->addr - 1);
>> + adv->i2c_cec = i2c_new_secondary_device(adv->i2c_main, "cec",
>> + ADV7511_CEC_I2C_ADDR_DEFAULT);
>> if (!adv->i2c_cec)
>> - return -ENOMEM;
>> + return -EINVAL;
>> i2c_set_clientdata(adv->i2c_cec, adv);
>>
>> adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec,
>> @@ -1082,8 +1082,6 @@ 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;
>> - unsigned int main_i2c_addr = i2c->addr << 1;
>> - unsigned int edid_i2c_addr = main_i2c_addr + 4;
>> unsigned int val;
>> int ret;
>>
>> @@ -1153,24 +1151,35 @@ static int adv7511_probe(struct i2c_client *i2c,
>> const struct i2c_device_id *id) if (ret)
>> goto uninit_regulators;
>>
>> - regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr);
>> - regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
>> - main_i2c_addr - 0xa);
>> - regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR,
>> - main_i2c_addr - 2);
>> -
>> adv7511_packet_disable(adv7511, 0xffff);
>>
>> - adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1);
>> + adv7511->i2c_edid = i2c_new_secondary_device(i2c, "edid",
>> + ADV7511_EDID_I2C_ADDR_DEFAULT);
>> if (!adv7511->i2c_edid) {
>> - ret = -ENOMEM;
>> + ret = -EINVAL;
>> goto uninit_regulators;
>> }
>>
>> + regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR,
>> + adv7511->i2c_edid->addr << 1);
>> +
>> ret = adv7511_init_cec_regmap(adv7511);
>> if (ret)
>> goto err_i2c_unregister_edid;
>>
>> + regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR,
>> + adv7511->i2c_cec->addr << 1);
>> +
>> + adv7511->i2c_packet = i2c_new_secondary_device(i2c, "packet",
>> + ADV7511_PACKET_I2C_ADDR_DEFAULT);
>> + if (!adv7511->i2c_packet) {
>> + ret = -EINVAL;
>> + goto err_unregister_cec;
>> + }
>> +
>> + regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
>> + adv7511->i2c_packet->addr << 1);
>> +
>> INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work);
>>
>> if (i2c->irq) {
>> @@ -1181,7 +1190,7 @@ static int adv7511_probe(struct i2c_client *i2c, const
>> struct i2c_device_id *id) IRQF_ONESHOT, dev_name(dev),
>> adv7511);
>> if (ret)
>> - goto err_unregister_cec;
>> + goto err_unregister_packet;
>> }
>>
>> adv7511_power_off(adv7511);
>> @@ -1203,6 +1212,8 @@ static int adv7511_probe(struct i2c_client *i2c, const
>> struct i2c_device_id *id) adv7511_audio_init(dev, adv7511);
>> return 0;
>>
>> +err_unregister_packet:
>> + i2c_unregister_device(adv7511->i2c_packet);
>> err_unregister_cec:
>> i2c_unregister_device(adv7511->i2c_cec);
>> if (adv7511->cec_clk)
>> @@ -1234,6 +1245,7 @@ static int adv7511_remove(struct i2c_client *i2c)
>> cec_unregister_adapter(adv7511->cec_adap);
>>
>> i2c_unregister_device(adv7511->i2c_edid);
>> + i2c_unregister_device(adv7511->i2c_packet);
>>
>> return 0;
>> }
>