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SubjectRe: [PATCH 4/5] drm/i915/dsi: Move Crystal Cove PMIC panel GPIO lookup from mfd to the i915 driver
On Sun, Dec 15, 2019 at 05:38:09PM +0100, Hans de Goede wrote:
> Move the Crystal Cove PMIC panel GPIO lookup-table from
> drivers/mfd/intel_soc_pmic_core.c to the i915 driver.
>
> The moved looked-up table is adding a GPIO lookup to the i915 PCI
> device and the GPIO subsys allows only one lookup table per device,
>
> The intel_soc_pmic_core.c code only adds lookup-table entries for the
> PMIC panel GPIO (as it deals only with the PMIC), but we also need to be
> able to access some GPIOs on the SoC itself, which requires entries for
> these GPIOs in the lookup-table.
>
> Since the lookup-table is attached to the i915 PCI device it really
> should be part of the i915 driver, this will also allow us to extend
> it with GPIOs from other sources when necessary.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
One nit below.

> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
> drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 23 +++++++++++++++++++-
> drivers/mfd/intel_soc_pmic_core.c | 19 ----------------
> 2 files changed, 22 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
> index 027970348b22..847f04eec2a1 100644
> --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
> +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
> @@ -25,6 +25,7 @@
> */
>
> #include <linux/gpio/consumer.h>
> +#include <linux/gpio/machine.h>
> #include <linux/mfd/intel_soc_pmic.h>
> #include <linux/slab.h>
>
> @@ -686,8 +687,18 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
>
> /*
> * On some BYT/CHT devs some sequences are incomplete and we need to manually
> - * control some GPIOs.
> + * control some GPIOs. We need to add a GPIO lookup table before we get these.
> */
> +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),

> + { },

Usually we don't put comma in terminator kind of lines. (Yes I see that it is
in original code, but we may have a chance to fix it without additional churn).
Rationale is to prevent some weird issues (like wrong conflict resolution)
where record may appear after terminator line and will be compiled correctly.

> + },
> +};
> +
> void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
> {
> struct drm_device *dev = intel_dsi->base.base.dev;
> @@ -697,6 +708,8 @@ 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);
> +
> 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");
> @@ -707,8 +720,16 @@ void intel_dsi_vbt_gpio_init(struct intel_dsi *intel_dsi, bool panel_is_on)
>
> 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 ((IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) &&
> + (mipi_config->pwm_blc == PPS_BLC_PMIC))
> + gpiod_remove_lookup_table(&pmic_panel_gpio_table);
> }
> diff --git a/drivers/mfd/intel_soc_pmic_core.c b/drivers/mfd/intel_soc_pmic_core.c
> index 47188df3080d..ddd64f9e3341 100644
> --- a/drivers/mfd/intel_soc_pmic_core.c
> +++ b/drivers/mfd/intel_soc_pmic_core.c
> @@ -9,8 +9,6 @@
> */
>
> #include <linux/acpi.h>
> -#include <linux/gpio/consumer.h>
> -#include <linux/gpio/machine.h>
> #include <linux/i2c.h>
> #include <linux/interrupt.h>
> #include <linux/module.h>
> @@ -25,17 +23,6 @@
> #define BYT_CRC_HRV 2
> #define CHT_CRC_HRV 3
>
> -/* Lookup table for the Panel Enable/Disable line as GPIO signals */
> -static struct gpiod_lookup_table 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),
> - { },
> - },
> -};
> -
> /* PWM consumed by the Intel GFX */
> static struct pwm_lookup crc_pwm_lookup[] = {
> PWM_LOOKUP("crystal_cove_pwm", 0, "0000:00:02.0", "pwm_pmic_backlight", 0, PWM_POLARITY_NORMAL),
> @@ -96,9 +83,6 @@ static int intel_soc_pmic_i2c_probe(struct i2c_client *i2c,
> if (ret)
> dev_warn(dev, "Can't enable IRQ as wake source: %d\n", ret);
>
> - /* Add lookup table binding for Panel Control to the GPIO Chip */
> - gpiod_add_lookup_table(&panel_gpio_table);
> -
> /* Add lookup table for crc-pwm */
> pwm_add_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
>
> @@ -121,9 +105,6 @@ static int intel_soc_pmic_i2c_remove(struct i2c_client *i2c)
>
> regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
>
> - /* Remove lookup table for Panel Control from the GPIO Chip */
> - gpiod_remove_lookup_table(&panel_gpio_table);
> -
> /* remove crc-pwm lookup table */
> pwm_remove_table(crc_pwm_lookup, ARRAY_SIZE(crc_pwm_lookup));
>
> --
> 2.23.0
>

--
With Best Regards,
Andy Shevchenko


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