drm/i915/dsi: skip gpio element execution when not supported

Skip v3 gpio element because the support is not there, and skip gpio
element on non-vlv because the sideband code is vlv specific.

v2: the gpio stuff is currently only supported on vlv (Ville)

Cc: drm-intel-fixes@lists.freedesktop.org
Fixes: 2a33d93486f2 ("drm/i915/bios: add support for MIPI sequence block v3")
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1454604767-2440-1-git-send-email-jani.nikula@intel.com
(cherry picked from commit 96afef1d5adee8722549c8c2b788d656ea2ecf21)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
index a8912ae..e8113ad 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
+++ b/drivers/gpu/drm/i915/intel_dsi_panel_vbt.c
@@ -204,6 +204,9 @@ 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 */
@@ -214,6 +217,16 @@ static const u8 *mipi_exec_gpio(struct intel_dsi *intel_dsi, const u8 *data)
                goto out;
        }
 
+       if (!IS_VALLEYVIEW(dev_priv)) {
+               DRM_DEBUG_KMS("GPIO element not supported on this platform\n");
+               goto out;
+       }
+
+       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;