From a44769b407ecd9df2dd86d8b855412e3aff8b41b Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sat, 29 Jun 2019 14:59:31 +0200 Subject: drm/msm/hdmi: Convert to use GPIO descriptors This switches the MSM HDMI code to use GPIO descriptors. Normally we would fetch the GPIOs from the device with the flags GPIOD_IN or GPIOD_OUT_[LOW|HIGH] to set up the lines immediately, but since the code seems eager to actively drive the lines high/low when turning HDMI on and off, we just fetch the GPIOs as-is and keep the code explicitly driving them. The old code would try legacy bindings (GPIOs without any "-gpios" suffix) but this has been moved to the gpiolib as a quirk by the previous patch. Cc: Rob Clark Cc: Sean Paul Cc: linux-arm-msm@vger.kernel.org Cc: freedreno@lists.freedesktop.org Signed-off-by: Linus Walleij Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/hdmi/hdmi.c | 66 +++++++++++++++---------------- drivers/gpu/drm/msm/hdmi/hdmi.h | 4 +- drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 42 ++++++-------------- 3 files changed, 45 insertions(+), 67 deletions(-) diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index 0e4217be3f00..355afb936401 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -425,38 +425,6 @@ static const struct { { "qcom,hdmi-tx-mux-lpm", true, 1, "HDMI_MUX_LPM" }, }; -static int msm_hdmi_get_gpio(struct device_node *of_node, const char *name) -{ - int gpio; - - /* try with the gpio names as in the table (downstream bindings) */ - gpio = of_get_named_gpio(of_node, name, 0); - if (gpio < 0) { - char name2[32]; - - /* try with the gpio names as in the upstream bindings */ - snprintf(name2, sizeof(name2), "%s-gpios", name); - gpio = of_get_named_gpio(of_node, name2, 0); - if (gpio < 0) { - char name3[32]; - - /* - * try again after stripping out the "qcom,hdmi-tx" - * prefix. This is mainly to match "hpd-gpios" used - * in the upstream bindings - */ - if (sscanf(name2, "qcom,hdmi-tx-%s", name3)) - gpio = of_get_named_gpio(of_node, name3, 0); - } - - if (gpio < 0) { - DBG("failed to get gpio: %s (%d)", name, gpio); - gpio = -1; - } - } - return gpio; -} - /* * HDMI audio codec callbacks */ @@ -582,11 +550,39 @@ static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) hdmi_cfg->qfprom_mmio_name = "qfprom_physical"; for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { - hdmi_cfg->gpios[i].num = msm_hdmi_get_gpio(of_node, - msm_hdmi_gpio_pdata[i].name); + const char *name = msm_hdmi_gpio_pdata[i].name; + struct gpio_desc *gpiod; + + /* + * 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. + */ + gpiod = devm_gpiod_get_optional(dev, name, GPIOD_ASIS); + /* This will catch e.g. -PROBE_DEFER */ + if (IS_ERR(gpiod)) + return PTR_ERR(gpiod); + if (!gpiod) { + /* Try a second time, stripping down the name */ + char name3[32]; + + /* + * Try again after stripping out the "qcom,hdmi-tx" + * prefix. This is mainly to match "hpd-gpios" used + * in the upstream bindings. + */ + if (sscanf(name, "qcom,hdmi-tx-%s", name3)) + gpiod = devm_gpiod_get_optional(dev, name3, GPIOD_ASIS); + if (IS_ERR(gpiod)) + return PTR_ERR(gpiod); + if (!gpiod) + DBG("failed to get gpio: %s", name); + } + hdmi_cfg->gpios[i].gpiod = gpiod; + if (gpiod) + gpiod_set_consumer_name(gpiod, msm_hdmi_gpio_pdata[i].label); hdmi_cfg->gpios[i].output = msm_hdmi_gpio_pdata[i].output; hdmi_cfg->gpios[i].value = msm_hdmi_gpio_pdata[i].value; - hdmi_cfg->gpios[i].label = msm_hdmi_gpio_pdata[i].label; } dev->platform_data = hdmi_cfg; diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h index 982865866a29..bdac452b00fb 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.h +++ b/drivers/gpu/drm/msm/hdmi/hdmi.h @@ -11,6 +11,7 @@ #include #include #include +#include #include #include "msm_drv.h" @@ -22,10 +23,9 @@ struct hdmi_phy; struct hdmi_platform_config; struct hdmi_gpio_data { - int num; + struct gpio_desc *gpiod; bool output; int value; - const char *label; }; struct hdmi_audio { diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c index 1976304b675e..839822d894d0 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c @@ -5,7 +5,7 @@ */ #include -#include +#include #include #include "msm_kms.h" @@ -69,30 +69,21 @@ static void msm_hdmi_phy_reset(struct hdmi *hdmi) static int gpio_config(struct hdmi *hdmi, bool on) { - struct device *dev = &hdmi->pdev->dev; const struct hdmi_platform_config *config = hdmi->config; - int ret, i; + int i; if (on) { for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { struct hdmi_gpio_data gpio = config->gpios[i]; - if (gpio.num != -1) { - ret = gpio_request(gpio.num, gpio.label); - if (ret) { - DRM_DEV_ERROR(dev, - "'%s'(%d) gpio_request failed: %d\n", - gpio.label, gpio.num, ret); - goto err; - } - + if (gpio.gpiod) { if (gpio.output) { - gpio_direction_output(gpio.num, - gpio.value); + gpiod_direction_output(gpio.gpiod, + gpio.value); } else { - gpio_direction_input(gpio.num); - gpio_set_value_cansleep(gpio.num, - gpio.value); + gpiod_direction_input(gpio.gpiod); + gpiod_set_value_cansleep(gpio.gpiod, + gpio.value); } } } @@ -102,29 +93,20 @@ 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.num == -1) + if (!gpio.gpiod) continue; if (gpio.output) { int value = gpio.value ? 0 : 1; - gpio_set_value_cansleep(gpio.num, value); + gpiod_set_value_cansleep(gpio.gpiod, value); } - - gpio_free(gpio.num); }; DBG("gpio off"); } return 0; -err: - while (i--) { - if (config->gpios[i].num != -1) - gpio_free(config->gpios[i].num); - } - - return ret; } static void enable_hpd_clocks(struct hdmi *hdmi, bool enable) @@ -312,7 +294,7 @@ static enum drm_connector_status detect_gpio(struct hdmi *hdmi) const struct hdmi_platform_config *config = hdmi->config; struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX]; - return gpio_get_value(hpd_gpio.num) ? + return gpiod_get_value(hpd_gpio.gpiod) ? connector_status_connected : connector_status_disconnected; } @@ -331,7 +313,7 @@ static enum drm_connector_status hdmi_connector_detect( * some platforms may not have hpd gpio. Rely only on the status * provided by REG_HDMI_HPD_INT_STATUS in this case. */ - if (hpd_gpio.num == -1) + if (!hpd_gpio.gpiod) return detect_reg(hdmi); do { -- cgit v1.2.3-58-ga151