diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dsi_vbt.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 243 |
1 files changed, 239 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c index f90946c912ee..04f953ba8f00 100644 --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c @@ -25,7 +25,10 @@ */ #include <linux/gpio/consumer.h> +#include <linux/gpio/machine.h> #include <linux/mfd/intel_soc_pmic.h> +#include <linux/pinctrl/consumer.h> +#include <linux/pinctrl/machine.h> #include <linux/slab.h> #include <asm/intel-mid.h> @@ -83,6 +86,12 @@ static struct gpio_map vlv_gpio_table[] = { { VLV_GPIO_NC_11_PANEL1_BKLTCTL }, }; +struct i2c_adapter_lookup { + u16 slave_addr; + struct intel_dsi *intel_dsi; + acpi_handle dev_handle; +}; + #define CHV_GPIO_IDX_START_N 0 #define CHV_GPIO_IDX_START_E 73 #define CHV_GPIO_IDX_START_SW 100 @@ -375,11 +384,112 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data) return data; } +#ifdef CONFIG_ACPI +static int i2c_adapter_lookup(struct acpi_resource *ares, void *data) +{ + struct i2c_adapter_lookup *lookup = data; + struct intel_dsi *intel_dsi = lookup->intel_dsi; + struct acpi_resource_i2c_serialbus *sb; + struct i2c_adapter *adapter; + acpi_handle adapter_handle; + acpi_status status; + + if (!i2c_acpi_get_i2c_resource(ares, &sb)) + return 1; + + if (lookup->slave_addr != sb->slave_address) + return 1; + + status = acpi_get_handle(lookup->dev_handle, + sb->resource_source.string_ptr, + &adapter_handle); + if (ACPI_FAILURE(status)) + return 1; + + adapter = i2c_acpi_find_adapter_by_handle(adapter_handle); + if (adapter) + intel_dsi->i2c_bus_num = adapter->nr; + + return 1; +} + +static void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi, + const u16 slave_addr) +{ + struct drm_device *drm_dev = intel_dsi->base.base.dev; + struct device *dev = &drm_dev->pdev->dev; + struct acpi_device *acpi_dev; + struct list_head resource_list; + struct i2c_adapter_lookup lookup; + + acpi_dev = ACPI_COMPANION(dev); + if (acpi_dev) { + memset(&lookup, 0, sizeof(lookup)); + lookup.slave_addr = slave_addr; + lookup.intel_dsi = intel_dsi; + lookup.dev_handle = acpi_device_handle(acpi_dev); + + INIT_LIST_HEAD(&resource_list); + acpi_dev_get_resources(acpi_dev, &resource_list, + i2c_adapter_lookup, + &lookup); + acpi_dev_free_resource_list(&resource_list); + } +} +#else +static inline void i2c_acpi_find_adapter(struct intel_dsi *intel_dsi, + const u16 slave_addr) +{ +} +#endif + static const u8 *mipi_exec_i2c(struct intel_dsi *intel_dsi, const u8 *data) { - DRM_DEBUG_KMS("Skipping I2C element execution\n"); + struct drm_device *drm_dev = intel_dsi->base.base.dev; + struct device *dev = &drm_dev->pdev->dev; + struct i2c_adapter *adapter; + struct i2c_msg msg; + int ret; + u8 vbt_i2c_bus_num = *(data + 2); + u16 slave_addr = *(u16 *)(data + 3); + u8 reg_offset = *(data + 5); + u8 payload_size = *(data + 6); + u8 *payload_data; + + if (intel_dsi->i2c_bus_num < 0) { + intel_dsi->i2c_bus_num = vbt_i2c_bus_num; + i2c_acpi_find_adapter(intel_dsi, slave_addr); + } + + adapter = i2c_get_adapter(intel_dsi->i2c_bus_num); + if (!adapter) { + DRM_DEV_ERROR(dev, "Cannot find a valid i2c bus for xfer\n"); + goto err_bus; + } - return data + *(data + 6) + 7; + payload_data = kzalloc(payload_size + 1, GFP_KERNEL); + if (!payload_data) + goto err_alloc; + + payload_data[0] = reg_offset; + memcpy(&payload_data[1], (data + 7), payload_size); + + msg.addr = slave_addr; + msg.flags = 0; + msg.len = payload_size + 1; + msg.buf = payload_data; + + ret = i2c_transfer(adapter, &msg, 1); + if (ret < 0) + DRM_DEV_ERROR(dev, + "Failed to xfer payload of size (%u) to reg (%u)\n", + payload_size, reg_offset); + + kfree(payload_data); +err_alloc: + i2c_put_adapter(adapter); +err_bus: + return data + payload_size + 7; } static const u8 *mipi_exec_spi(struct intel_dsi *intel_dsi, const u8 *data) @@ -453,8 +563,8 @@ static const char *sequence_name(enum mipi_seq seq_id) return "(unknown)"; } -void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi, - enum mipi_seq seq_id) +static void intel_dsi_vbt_exec(struct intel_dsi *intel_dsi, + enum mipi_seq seq_id) { struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); const u8 *data; @@ -519,6 +629,22 @@ void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi, } } +void intel_dsi_vbt_exec_sequence(struct intel_dsi *intel_dsi, + enum mipi_seq seq_id) +{ + if (seq_id == MIPI_SEQ_POWER_ON && intel_dsi->gpio_panel) + gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1); + if (seq_id == MIPI_SEQ_BACKLIGHT_ON && intel_dsi->gpio_backlight) + gpiod_set_value_cansleep(intel_dsi->gpio_backlight, 1); + + intel_dsi_vbt_exec(intel_dsi, seq_id); + + if (seq_id == MIPI_SEQ_POWER_OFF && intel_dsi->gpio_panel) + gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0); + if (seq_id == MIPI_SEQ_BACKLIGHT_OFF && intel_dsi->gpio_backlight) + gpiod_set_value_cansleep(intel_dsi->gpio_backlight, 0); +} + void intel_dsi_msleep(struct intel_dsi *intel_dsi, int msec) { struct drm_i915_private *dev_priv = to_i915(intel_dsi->base.base.dev); @@ -664,6 +790,8 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id) intel_dsi->panel_off_delay = pps->panel_off_delay / 10; intel_dsi->panel_pwr_cycle_delay = pps->panel_power_cycle_delay / 10; + intel_dsi->i2c_bus_num = -1; + /* a regular driver would get the device in probe */ for_each_dsi_port(port, intel_dsi->ports) { mipi_dsi_attach(intel_dsi->dsi_hosts[port]->device); @@ -671,3 +799,110 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id) return true; } + +/* + * On some BYT/CHT devs some sequences are incomplete and we need to manually + * control some GPIOs. We need to add a GPIO lookup table before we get these. + * If the GOP did not initialize the panel (HDMI inserted) we may need to also + * change the pinmux for the SoC's PWM0 pin from GPIO to PWM. + */ +static struct gpiod_lookup_table pmic_panel_gpio_table = { + /* Intel GFX is consumer */ + .dev_id = "0000:00:02.0", + .table = { + /* Panel EN/DISABLE */ + GPIO_LOOKUP("gpio_crystalcove", 94, "panel", GPIO_ACTIVE_HIGH), + { } + }, +}; + +static struct gpiod_lookup_table soc_panel_gpio_table = { + .dev_id = "0000:00:02.0", + .table = { + GPIO_LOOKUP("INT33FC:01", 10, "backlight", GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("INT33FC:01", 11, "panel", GPIO_ACTIVE_HIGH), + { } + }, +}; + +static const struct pinctrl_map soc_pwm_pinctrl_map[] = { + PIN_MAP_MUX_GROUP("0000:00:02.0", "soc_pwm0", "INT33FC:00", + "pwm0_grp", "pwm"), +}; + +void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on) +{ + struct drm_device *dev = intel_dsi->base.base.dev; + struct drm_i915_private *dev_priv = to_i915(dev); + struct mipi_config *mipi_config = dev_priv->vbt.dsi.config; + enum gpiod_flags flags = panel_is_on ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; + bool want_backlight_gpio = false; + bool want_panel_gpio = false; + struct pinctrl *pinctrl; + int ret; + + if ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) && + mipi_config->pwm_blc == PPS_BLC_PMIC) { + gpiod_add_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); + want_panel_gpio = true; + want_backlight_gpio = true; + + /* Ensure PWM0 pin is muxed as PWM instead of GPIO */ + ret = pinctrl_register_mappings(soc_pwm_pinctrl_map, + ARRAY_SIZE(soc_pwm_pinctrl_map)); + if (ret) + DRM_ERROR("Failed to register pwm0 pinmux mapping\n"); + + pinctrl = devm_pinctrl_get_select(dev->dev, "soc_pwm0"); + if (IS_ERR(pinctrl)) + DRM_ERROR("Failed to set pinmux to PWM\n"); + } + + if (want_panel_gpio) { + intel_dsi->gpio_panel = gpiod_get(dev->dev, "panel", flags); + if (IS_ERR(intel_dsi->gpio_panel)) { + DRM_ERROR("Failed to own gpio for panel control\n"); + intel_dsi->gpio_panel = NULL; + } + } + + if (want_backlight_gpio) { + intel_dsi->gpio_backlight = + gpiod_get(dev->dev, "backlight", flags); + if (IS_ERR(intel_dsi->gpio_backlight)) { + DRM_ERROR("Failed to own gpio for backlight control\n"); + intel_dsi->gpio_backlight = NULL; + } + } +} + +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 mipi_config *mipi_config = dev_priv->vbt.dsi.config; + + if (intel_dsi->gpio_panel) { + gpiod_put(intel_dsi->gpio_panel); + intel_dsi->gpio_panel = NULL; + } + + if (intel_dsi->gpio_backlight) { + 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); + } +} |