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 <robdclark@xxxxxxxxx>
Cc: Sean Paul <sean@xxxxxxxxxx>
Cc: linux-arm-msm@xxxxxxxxxxxxxxx
Cc: freedreno@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
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 e247d6942a49..c8e8268c76e2 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -436,38 +436,6 @@ 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
*/
@@ -593,11 +561,39 @@ 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 5c5df6ab2a57..3ef956e8de71 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.h
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.h
@@ -22,6 +22,7 @@
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
+#include <linux/gpio/consumer.h>
#include <linux/hdmi.h>
#include "msm_drv.h"
@@ -33,10 +34,9 @@ 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 a6eeab2c4dc3..c4e9f6d7960f 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
@@ -15,7 +15,7 @@
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/pinctrl/consumer.h>
#include "msm_kms.h"
@@ -79,30 +79,21 @@ 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);
}
}
}
@@ -112,29 +103,20 @@ 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)
@@ -322,7 +304,7 @@ 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;
}
@@ -341,7 +323,7 @@ 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 {
--
2.20.1
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