Re: [PATCH v2 2/9] drm/i915/dsi: add support for DSI sequence block v2 gpio element

From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Jani Nikula <jani.nikula@intel.com>
Cc: Deepak M <m.deepak@intel.com>, intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH v2 2/9] drm/i915/dsi: add support for DSI sequence block v2 gpio element
Date: Mon, 4 Apr 2016 19:19:02 +0300	[thread overview]
Message-ID: <20160404161902.GK4329@intel.com> (raw)
In-Reply-To: <87152feec8f921dc82502af1b29c0956b0d360bb.1458299160.git.jani.nikula@intel.com>

On Fri, Mar 18, 2016 at 01:11:10PM +0200, Jani Nikula wrote:
> In sequence block v2, and only in v2, the gpio source (i.e. IOSF port)
> is specified separately.
> 
> v2: initialize gpio_source to 0 and handle v1 and v2 in the same branch
> 
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

> ---
>  drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 22 ++++++++++++++++++----
>  1 file changed, 18 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> index f687b2e9d8ca..af1a47b5224f 100644
> --- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> +++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> @@ -198,7 +198,7 @@ static const u8 *mipi_exec_delay(struct intel_dsi *intel_dsi, const u8 *data)
>  
>  static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
>  {
> -	u8 gpio_index, action;
> +	u8 gpio_source, gpio_index, action, port;
>  	u16 function, pad;
>  	u32 val;
>  	struct drm_device *dev = intel_dsi->base.base.dev;
> @@ -209,6 +209,12 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
>  
>  	gpio_index = *data++;
>  
> +	/* gpio source in sequence v2 only */
> +	if (dev_priv->vbt.dsi.seq_version == 2)
> +		gpio_source = (*data >> 1) & 3;
> +	else
> +		gpio_source = 0;
> +
>  	/* pull up/down */
>  	action = *data++ & 1;
>  
> @@ -225,6 +231,15 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
>  	if (dev_priv->vbt.dsi.seq_version >= 3) {
>  		DRM_DEBUG_KMS("GPIO element v3 not supported\n");
>  		goto out;
> +	} else {
> +		if (gpio_source == 0) {
> +			port = IOSF_PORT_GPIO_NC;
> +		} else if (gpio_source == 1) {
> +			port = IOSF_PORT_GPIO_SC;
> +		} else {
> +			DRM_DEBUG_KMS("unknown gpio source %u\n", gpio_source);
> +			goto out;
> +		}
>  	}
>  
>  	function = gtable[gpio_index].function_reg;
> @@ -234,15 +249,14 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
>  	if (!gtable[gpio_index].init) {
>  		/* program the function */
>  		/* FIXME: remove constant below */
> -		vlv_iosf_sb_write(dev_priv, IOSF_PORT_GPIO_NC, function,
> -				  0x2000CC00);
> +		vlv_iosf_sb_write(dev_priv, port, function, 0x2000CC00);
>  		gtable[gpio_index].init = 1;
>  	}
>  
>  	val = 0x4 | action;
>  
>  	/* pull up/down */
> -	vlv_iosf_sb_write(dev_priv, IOSF_PORT_GPIO_NC, pad, val);
> +	vlv_iosf_sb_write(dev_priv, port, pad, val);
>  	mutex_unlock(&dev_priv->sb_lock);
>  
>  out:
> -- 
> 2.1.4

-- 
Ville Syrjälä
Intel OTC
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