From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
Commit 98ce1eb1fd87e ("gpiolib: introduce gpio_chip setters that return
values") added new line setter callbacks to struct gpio_chip. They allow
to indicate failures to callers. We're in the process of converting all
GPIO controllers to using them before removing the old ones.
---
 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 60224f476e1d048c693ab36a0a79b6897c6101a8..3814253f36755ca749426993fcc964fa253cb5f2 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -1707,24 +1707,20 @@ static int ti_sn_bridge_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	return !!(val & BIT(SN_GPIO_INPUT_SHIFT + offset));
 }
 
-static void ti_sn_bridge_gpio_set(struct gpio_chip *chip, unsigned int offset,
-				  int val)
+static int ti_sn_bridge_gpio_set(struct gpio_chip *chip, unsigned int offset,
+				 int val)
 {
 	struct ti_sn65dsi86 *pdata = gpiochip_get_data(chip);
-	int ret;
 
 	if (!test_bit(offset, pdata->gchip_output)) {
 		dev_err(pdata->dev, "Ignoring GPIO set while input\n");
-		return;
+		return -EPERM;
 	}
 
 	val &= 1;
-	ret = regmap_update_bits(pdata->regmap, SN_GPIO_IO_REG,
-				 BIT(SN_GPIO_OUTPUT_SHIFT + offset),
-				 val << (SN_GPIO_OUTPUT_SHIFT + offset));
-	if (ret)
-		dev_warn(pdata->dev,
-			 "Failed to set bridge GPIO %u: %d\n", offset, ret);
+	return regmap_update_bits(pdata->regmap, SN_GPIO_IO_REG,
+				  BIT(SN_GPIO_OUTPUT_SHIFT + offset),
+				  val << (SN_GPIO_OUTPUT_SHIFT + offset));
 }
 
 static int ti_sn_bridge_gpio_direction_input(struct gpio_chip *chip,
@@ -1828,7 +1824,7 @@ static int ti_sn_gpio_probe(struct auxiliary_device *adev,
 	pdata->gchip.direction_input = ti_sn_bridge_gpio_direction_input;
 	pdata->gchip.direction_output = ti_sn_bridge_gpio_direction_output;
 	pdata->gchip.get = ti_sn_bridge_gpio_get;
-	pdata->gchip.set = ti_sn_bridge_gpio_set;
+	pdata->gchip.set_rv = ti_sn_bridge_gpio_set;
 	pdata->gchip.can_sleep = true;
 	pdata->gchip.names = ti_sn_bridge_gpio_names;
 	pdata->gchip.ngpio = SN_NUM_GPIOS;

---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
change-id: 20250522-gpiochip-set-rv-gpu-a52d543ca722

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Hi,

On Tue, Jun 10, 2025 at 5:34 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
>
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> ---
> Commit 98ce1eb1fd87e ("gpiolib: introduce gpio_chip setters that return
> values") added new line setter callbacks to struct gpio_chip. They allow
> to indicate failures to callers. We're in the process of converting all
> GPIO controllers to using them before removing the old ones.
> ---
>  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 18 +++++++-----------
>  1 file changed, 7 insertions(+), 11 deletions(-)

Reviewed-by: Douglas Anderson <dianders@chromium.org>

Looks like this should be fine to go through drm-misc. I'll plan to
apply it next week unless I get overly distracted.

-Doug

Hi,

On Tue, Jun 10, 2025 at 9:27 AM Doug Anderson <dianders@chromium.org> wrote:
>
> Hi,
>
> On Tue, Jun 10, 2025 at 5:34 AM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> >
> > From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> >
> > struct gpio_chip now has callbacks for setting line values that return
> > an integer, allowing to indicate failures. Convert the driver to using
> > them.
> >
> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
> > ---
> > Commit 98ce1eb1fd87e ("gpiolib: introduce gpio_chip setters that return
> > values") added new line setter callbacks to struct gpio_chip. They allow
> > to indicate failures to callers. We're in the process of converting all
> > GPIO controllers to using them before removing the old ones.
> > ---
> >  drivers/gpu/drm/bridge/ti-sn65dsi86.c | 18 +++++++-----------
> >  1 file changed, 7 insertions(+), 11 deletions(-)
>
> Reviewed-by: Douglas Anderson <dianders@chromium.org>
>
> Looks like this should be fine to go through drm-misc. I'll plan to
> apply it next week unless I get overly distracted.

Pushed to drm-misc-next:

[1/1] drm/bridge: ti-sn65dsi86: use new GPIO line value setter callbacks
      commit: 98df1626ae036c1ba8c844c9fd995ab8f23bbe37