[PATCH v3 09/15] drm/i915/dsi: Remove GPIO lookup table at the end of intel_dsi_vbt_gpio_init()

Andy Shevchenko
2023-11-02T15:13:39Z

From: Hans de Goede <hdegoede@redhat.com>

To properly deal with GPIOs used in MIPI panel sequences a temporary
GPIO lookup will be used. Since there can only be 1 GPIO lookup table
for the "0000:00:02.0" device this will not work if the GPIO lookup
table used by intel_dsi_vbt_gpio_init() is still registered.

After getting the "backlight" and "panel" GPIOs the lookup table
registered by intel_dsi_vbt_gpio_init() is no longer necessary,
remove it so that another temporary lookup-table for the "0000:00:02.0"
device can be added.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 25 +++++++-------------
1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
index d270437217b3..8e6beef90e5e 100644
--- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
+++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
@@ -955,6 +955,7 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
struct intel_connector *connector = intel_dsi->attached_connector;
struct mipi_config *mipi_config = connector->panel.vbt.dsi.config;
enum gpiod_flags flags = panel_is_on ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW;
+ struct gpiod_lookup_table *gpiod_lookup_table = NULL;
bool want_backlight_gpio = false;
bool want_panel_gpio = false;
struct pinctrl *pinctrl;
@@ -962,12 +963,12 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)

if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
mipi_config->pwm_blc == PPS_BLC_PMIC) {
- gpiod_add_lookup_table(&pmic_panel_gpio_table);
+ gpiod_lookup_table = &pmic_panel_gpio_table;
want_panel_gpio = true;
}

if (IS_VALLEYVIEW(dev_priv) && mipi_config->pwm_blc == PPS_BLC_SOC) {
- gpiod_add_lookup_table(&soc_panel_gpio_table);
+ gpiod_lookup_table = &soc_panel_gpio_table;
want_panel_gpio = true;
want_backlight_gpio = true;

@@ -984,6 +985,9 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
"Failed to set pinmux to PWM\n");
}

+ if (gpiod_lookup_table)
+ gpiod_add_lookup_table(gpiod_lookup_table);
+
if (want_panel_gpio) {
intel_dsi->gpio_panel = gpiod_get(dev->dev, "panel", flags);
if (IS_ERR(intel_dsi->gpio_panel)) {
@@ -1002,15 +1006,13 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
intel_dsi->gpio_backlight = NULL;
}
}
+
+ if (gpiod_lookup_table)
+ gpiod_remove_lookup_table(gpiod_lookup_table);
}

void intel_dsi_vbt_gpio_cleanup(struct intel_dsi *intel_dsi)
{
- struct drm_device *dev = intel_dsi->base.base.dev;
- struct drm_i915_private *dev_priv = to_i915(dev);
- struct intel_connector *connector = intel_dsi->attached_connector;
- struct mipi_config *mipi_config = connector->panel.vbt.dsi.config;
-
if (intel_dsi->gpio_panel) {
gpiod_put(intel_dsi->gpio_panel);
intel_dsi->gpio_panel = NULL;
@@ -1020,13 +1022,4 @@ void intel_dsi_vbt_gpio_cleanup(struct intel_dsi *intel_dsi)
gpiod_put(intel_dsi->gpio_backlight);
intel_dsi->gpio_backlight = NULL;
}
-
- if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
- mipi_config->pwm_blc == PPS_BLC_PMIC)
- gpiod_remove_lookup_table(&pmic_panel_gpio_table);
-
- if (IS_VALLEYVIEW(dev_priv) && mipi_config->pwm_blc == PPS_BLC_SOC) {
- pinctrl_unregister_mappings(soc_pwm_pinctrl_map);
- gpiod_remove_lookup_table(&soc_panel_gpio_table);
- }
}
--
2.40.0.1.gaa8946217a0b