There is elaborate code in the HDMI connector handling to leave the connector in the state it was at power-on and only touch the GPIOs when the connector .enable() and .disable() callbacks are called.
I don't think this is what we normally want, initialize the connector as OFF (possibly saving power?) using the appropriate GPIO descriptor flags. It will still be switched on/off in the enable()/disable() connector callback as before, but we can drop some strange surplus code.
Cc: Rob Clark robdclark@gmail.com Cc: Sean Paul sean@poorly.run Cc: linux-arm-msm@vger.kernel.org Cc: freedreno@lists.freedesktop.org Signed-off-by: Linus Walleij linus.walleij@linaro.org --- drivers/gpu/drm/msm/hdmi/hdmi.c | 19 ++++++++++++----- drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 25 ++++++----------------- 2 files changed, 20 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index c8e8268c76e2..7d87f8821d2f 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -563,13 +563,22 @@ static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { const char *name = msm_hdmi_gpio_pdata[i].name; struct gpio_desc *gpiod; + enum gpiod_flags flags;
/* - * We are fetching the GPIO lines "as is" since the connector - * code is enabling and disabling the lines. Until that point - * the power-on default value will be kept. + * Notice the inverse set up here: we initialize the connector + * to OFF state. */ - gpiod = devm_gpiod_get_optional(dev, name, GPIOD_ASIS); + if (msm_hdmi_gpio_pdata[i].output) { + if (msm_hdmi_gpio_pdata[i].value) + flags = GPIOD_OUT_LOW; + else + flags = GPIOD_OUT_HIGH; + } else { + flags = GPIOD_IN; + } + + gpiod = devm_gpiod_get_optional(dev, name, flags); /* This will catch e.g. -PROBE_DEFER */ if (IS_ERR(gpiod)) return PTR_ERR(gpiod); @@ -583,7 +592,7 @@ static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) * in the upstream bindings. */ if (sscanf(name, "qcom,hdmi-tx-%s", name3)) - gpiod = devm_gpiod_get_optional(dev, name3, GPIOD_ASIS); + gpiod = devm_gpiod_get_optional(dev, name3, flags); if (IS_ERR(gpiod)) return PTR_ERR(gpiod); if (!gpiod) diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c index c4e9f6d7960f..89c64cc85027 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c @@ -86,16 +86,9 @@ static int gpio_config(struct hdmi *hdmi, bool on) for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { struct hdmi_gpio_data gpio = config->gpios[i];
- if (gpio.gpiod) { - if (gpio.output) { - gpiod_direction_output(gpio.gpiod, - gpio.value); - } else { - gpiod_direction_input(gpio.gpiod); - gpiod_set_value_cansleep(gpio.gpiod, - gpio.value); - } - } + /* The value indicates the value for turning things on */ + if (gpio.gpiod) + gpiod_set_value_cansleep(gpio.gpiod, gpio.value); }
DBG("gpio on"); @@ -103,16 +96,10 @@ static int gpio_config(struct hdmi *hdmi, bool on) for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { struct hdmi_gpio_data gpio = config->gpios[i];
- if (!gpio.gpiod) - continue; - - if (gpio.output) { - int value = gpio.value ? 0 : 1; - - gpiod_set_value_cansleep(gpio.gpiod, value); - } + /* The inverse value turns stuff off */ + if (gpio.gpiod && gpio.output) + gpiod_set_value_cansleep(gpio.gpiod, !gpio.value); }; - DBG("gpio off"); }