Hi Laurent, Archit, Andrzej & Yannick, Do you have any comments on this v2 driver part? (more details regarding v1/v2 differences in the cover letter https://www.spinics.net/lists/dri-devel/msg174137.html) Thank you, Philippe :-) On 04/25/2018 09:53 AM, Philippe Cornu wrote: > Add the optional power supplies using the description found in > "SiI9022A/SiI9024A HDMI Transmitter Data Sheet (August 2016)". > > The sii902x input IOs are not "io safe" so it is important to > enable/disable voltage regulators during probe/remove phases to > avoid damages. > > Signed-off-by: Philippe Cornu <philippe.cornu@xxxxxx> > --- > drivers/gpu/drm/bridge/sii902x.c | 38 ++++++++++++++++++++++++++++++++++---- > 1 file changed, 34 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c > index 60373d7eb220..c367d7b91ade 100644 > --- a/drivers/gpu/drm/bridge/sii902x.c > +++ b/drivers/gpu/drm/bridge/sii902x.c > @@ -24,6 +24,7 @@ > #include <linux/i2c.h> > #include <linux/module.h> > #include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > > #include <drm/drmP.h> > #include <drm/drm_atomic_helper.h> > @@ -86,6 +87,7 @@ struct sii902x { > struct drm_bridge bridge; > struct drm_connector connector; > struct gpio_desc *reset_gpio; > + struct regulator_bulk_data supplies[2]; > }; > > static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge) > @@ -392,23 +394,42 @@ static int sii902x_probe(struct i2c_client *client, > return PTR_ERR(sii902x->reset_gpio); > } > > + sii902x->supplies[0].supply = "iovcc"; > + sii902x->supplies[1].supply = "vcc12"; > + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(sii902x->supplies), > + sii902x->supplies); > + if (ret) { > + dev_err(dev, "Failed to get power supplies: %d\n", ret); > + return ret; > + } > + > + ret = regulator_bulk_enable(ARRAY_SIZE(sii902x->supplies), > + sii902x->supplies); > + if (ret) { > + dev_err(dev, "Failed to enable power supplies: %d\n", ret); > + return ret; > + } > + > + usleep_range(10000, 20000); > + > sii902x_reset(sii902x); > > ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0); > if (ret) > - return ret; > + goto err_disable_regulator; > > ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0), > &chipid, 4); > if (ret) { > dev_err(dev, "regmap_read failed %d\n", ret); > - return ret; > + goto err_disable_regulator; > } > > if (chipid[0] != 0xb0) { > dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n", > chipid[0]); > - return -EINVAL; > + ret = -EINVAL; > + goto err_disable_regulator; > } > > /* Clear all pending interrupts */ > @@ -424,7 +445,7 @@ static int sii902x_probe(struct i2c_client *client, > IRQF_ONESHOT, dev_name(dev), > sii902x); > if (ret) > - return ret; > + goto err_disable_regulator; > } > > sii902x->bridge.funcs = &sii902x_bridge_funcs; > @@ -434,6 +455,12 @@ static int sii902x_probe(struct i2c_client *client, > i2c_set_clientdata(client, sii902x); > > return 0; > + > +err_disable_regulator: > + regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies), > + sii902x->supplies); > + > + return ret; > } > > static int sii902x_remove(struct i2c_client *client) > @@ -443,6 +470,9 @@ static int sii902x_remove(struct i2c_client *client) > > drm_bridge_remove(&sii902x->bridge); > > + regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies), > + sii902x->supplies); > + > return 0; > } > > ��.n��������+%������w��{.n����z�{��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
