Re: [Intel-gfx] [v4 2/7] drm/i915/jsl: program DSI panel GPIOs

[Jani Nikula <jani.nikula@intel.com>]

On Thu, 12 Aug 2021, Lee Shawn C <shawn.c.lee@intel.com> wrote:
> DSI driver should have its own implementation to toggle
> gpio pins based on GPIO info coming from VBT sequences.
>
> v2: Remove redundant ICP_PP_CONTROL() define.
>
> Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
> Cc: Cooper Chiou <cooper.chiou@intel.com>
> Cc: William Tseng <william.tseng@intel.com>
> Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 44 +++++++++++++++++++-
>  1 file changed, 43 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
> index cc93e045a425..57676a5e560c 100644
> --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
> +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
> @@ -43,6 +43,7 @@
>  #include "intel_display_types.h"
>  #include "intel_dsi.h"
>  #include "intel_sideband.h"
> +#include "intel_de.h"
>  
>  #define MIPI_TRANSFER_MODE_SHIFT	0
>  #define MIPI_VIRTUAL_CHANNEL_SHIFT	1
> @@ -354,7 +355,48 @@ static void bxt_exec_gpio(struct drm_i915_private *dev_priv,
>  static void icl_exec_gpio(struct drm_i915_private *dev_priv,
>  			  u8 gpio_source, u8 gpio_index, bool value)
>  {
> -	drm_dbg_kms(&dev_priv->drm, "Skipping ICL GPIO element execution\n");
> +	u32 val;
> +
> +	switch (gpio_index) {
> +	case ICL_GPIO_L_VDDEN_1:
> +		val = intel_de_read(dev_priv, PP_CONTROL(0));
> +		if (value)
> +			val |= PANEL_POWER_ON;
> +		else
> +			val &= ~PANEL_POWER_ON;
> +		intel_de_write(dev_priv, PP_CONTROL(0), val);
> +		break;
> +	case ICL_GPIO_L_BKLTEN_1:
> +		val = intel_de_read(dev_priv, PP_CONTROL(0));
> +		if (value)
> +			val |= EDP_BLC_ENABLE;
> +		else
> +			val &= ~EDP_BLC_ENABLE;
> +		intel_de_write(dev_priv, PP_CONTROL(0), val);
> +		break;

Again, this breaks the PPS abstractions we have in intel_pps.[ch].

BR,
Jani.

> +	case ICL_GPIO_DDPA_CTRLCLK_1:
> +		val = intel_de_read(dev_priv, GPIO(1));
> +		if (value)
> +			val |= GPIO_CLOCK_VAL_OUT;
> +		else
> +			val &= ~GPIO_CLOCK_VAL_OUT;
> +		val |= GPIO_CLOCK_DIR_MASK | GPIO_CLOCK_DIR_OUT | GPIO_CLOCK_VAL_MASK;
> +		intel_de_write(dev_priv, GPIO(1), val);
> +		break;
> +	case ICL_GPIO_DDPA_CTRLDATA_1:
> +		val = intel_de_read(dev_priv, GPIO(1));
> +		if (value)
> +			val |= GPIO_DATA_VAL_OUT;
> +		else
> +			val &= ~GPIO_DATA_VAL_OUT;
> +		val |= GPIO_DATA_DIR_MASK | GPIO_DATA_DIR_OUT | GPIO_DATA_VAL_MASK;
> +		intel_de_write(dev_priv, GPIO(1), val);
> +		break;
> +	default:
> +		/* TODO: Add support for remaining GPIOs */
> +		DRM_ERROR("Invalid GPIO number (%d) from VBT\n", gpio_index);
> +		break;
> +	}
>  }
>  
>  static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)

-- 
Jani Nikula, Intel Open Source Graphics Center