drm/i915: Use FLISDSI interface for band gap reset

v2: Rebased on latest code

Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Yogesh Mohan Marimuthu <yogesh.mohan.marimuthu@intel.com>
Reviewed-by: Jani Nikula<jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 8 insertions, 39 deletions

diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 42ed28a309f5..1016e7b0337e 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -37,49 +37,18 @@
 static const struct intel_dsi_device intel_dsi_devices[] = {
 };
 
-
-static void vlv_cck_modify(struct drm_i915_private *dev_priv, u32 reg, u32 val,
-			   u32 mask)
-{
-	u32 tmp = vlv_cck_read(dev_priv, reg);
-	tmp &= ~mask;
-	tmp |= val;
-	vlv_cck_write(dev_priv, reg, tmp);
-}
-
-static void band_gap_wa(struct drm_i915_private *dev_priv)
+static void band_gap_reset(struct drm_i915_private *dev_priv)
 {
 	mutex_lock(&dev_priv->dpio_lock);
 
-	/* Enable bandgap fix in GOP driver */
-	vlv_cck_modify(dev_priv, 0x6D, 0x00010000, 0x00030000);
-	msleep(20);
-	vlv_cck_modify(dev_priv, 0x6E, 0x00010000, 0x00030000);
-	msleep(20);
-	vlv_cck_modify(dev_priv, 0x6F, 0x00010000, 0x00030000);
-	msleep(20);
-	vlv_cck_modify(dev_priv, 0x00, 0x00008000, 0x00008000);
-	msleep(20);
-	vlv_cck_modify(dev_priv, 0x00, 0x00000000, 0x00008000);
-	msleep(20);
-
-	/* Turn Display Trunk on */
-	vlv_cck_modify(dev_priv, 0x6B, 0x00020000, 0x00030000);
-	msleep(20);
-
-	vlv_cck_modify(dev_priv, 0x6C, 0x00020000, 0x00030000);
-	msleep(20);
-
-	vlv_cck_modify(dev_priv, 0x6D, 0x00020000, 0x00030000);
-	msleep(20);
-	vlv_cck_modify(dev_priv, 0x6E, 0x00020000, 0x00030000);
-	msleep(20);
-	vlv_cck_modify(dev_priv, 0x6F, 0x00020000, 0x00030000);
+	vlv_flisdsi_write(dev_priv, 0x08, 0x0001);
+	vlv_flisdsi_write(dev_priv, 0x0F, 0x0005);
+	vlv_flisdsi_write(dev_priv, 0x0F, 0x0025);
+	udelay(150);
+	vlv_flisdsi_write(dev_priv, 0x0F, 0x0000);
+	vlv_flisdsi_write(dev_priv, 0x08, 0x0000);
 
 	mutex_unlock(&dev_priv->dpio_lock);
-
-	/* Need huge delay, otherwise clock is not stable */
-	msleep(100);
 }
 
 static struct intel_dsi *intel_attached_dsi(struct drm_connector *connector)
@@ -364,7 +333,7 @@ static void intel_dsi_mode_set(struct intel_encoder *intel_encoder)
 	vlv_enable_dsi_pll(intel_encoder);
 
 	/* XXX: Location of the call */
-	band_gap_wa(dev_priv);
+	band_gap_reset(dev_priv);
 
 	/* escape clock divider, 20MHz, shared for A and C. device ready must be
 	 * off when doing this! txclkesc? */