Hi Philippe,
Thank you for the patch.
On Tuesday, 10 April 2018 08:19:27 EEST Philippe Cornu wrote:
> Add the 3 optional power supplies using the exact description
> found in the document named
> "SiI9022A/SiI9024A HDMI Transmitter Data Sheet (August 2016)".
>
> Signed-off-by: Philippe Cornu <philippe.co...@st.com>
> ---
> drivers/gpu/drm/bridge/sii902x.c | 39 +++++++++++++++++++++++++++++++++----
> 1 file changed, 35 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/sii902x.c
> b/drivers/gpu/drm/bridge/sii902x.c index 60373d7eb220..e17ba6db1ec8 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[3];
> };
>
> static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
> @@ -392,23 +394,43 @@ static int sii902x_probe(struct i2c_client *client,
> return PTR_ERR(sii902x->reset_gpio);
> }
>
> + sii902x->supplies[0].supply = "iovcc";
> + sii902x->supplies[1].supply = "avcc12";
> + sii902x->supplies[2].supply = "cvcc12";
> + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(sii902x->supplies),
> + sii902x->supplies);
> + if (ret) {
> + dev_err(dev, "regulator_bulk_get failed\n");
Maybe "failed to get power supplies" to be a bit more explicit ? And while at
it, printing the value of ret too ?
> + return ret;
> + }
> +
> + ret = regulator_bulk_enable(ARRAY_SIZE(sii902x->supplies),
> + sii902x->supplies);
> + if (ret) {
> + dev_err(dev, "regulator_bulk_enable failed\n");
Same here ?
> + 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 +446,7 @@ 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 +456,12 @@ 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 +471,9 @@ static int sii902x_remove(struct i2c_client *client)
>
> drm_bridge_remove(&sii902x->bridge);
>
> + regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies),
> + sii902x->supplies);
> +
While this seems functionally correct, would it be useful to only enable power
supplies when needed to save power ?
> return 0;
> }
--
Regards,
Laurent Pinchart
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