[Intel-gfx] [PATCH 4/8] drm/i915/dsi: skip gpio element execution when not supported

[Ville Syrjälä]

On Thu, Feb 04, 2016 at 12:50:52PM +0200, Jani Nikula wrote:
> Skip v3 gpio element because the support is not there, and skip gpio
> element on non-vlv/chv because the sideband code is vlv/chv specific.
> 
> Cc: drm-intel-fixes at lists.freedesktop.org
> Fixes: 2a33d93486f2 ("drm/i915/bios: add support for MIPI sequence block v3")
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> ---
>  drivers/gpu/drm/i915/intel_dsi_panel_vbt.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> index f4d303ee538b..3e1e70f81506 100644
> --- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> +++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
> @@ -205,6 +205,9 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
>  	struct drm_device *dev = intel_dsi->base.base.dev;
>  	struct drm_i915_private *dev_priv = dev->dev_private;
>  
> +	if (dev_priv->vbt.dsi.seq_version >= 3)
> +		data++;
> +
>  	gpio = *data++;
>  
>  	/* pull up/down */
> @@ -215,6 +218,16 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
>  		goto out;
>  	}
>  
> +	if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv)) {
> +		DRM_DEBUG_KMS("GPIO element not supported on this platform\n");
> +		goto out;
> +	}

The gpio register table is VLV specific. So CHV shall not pass.

> +
> +	if (dev_priv->vbt.dsi.seq_version >= 3) {
> +		DRM_DEBUG_KMS("GPIO element v3 not supported\n");
> +		goto out;
> +	}
> +
>  	function = gtable[gpio].function_reg;
>  	pad = gtable[gpio].pad_reg;
>  
> -- 
> 2.1.4
> 
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-- 
Ville Syrjälä
Intel OTC