drm/i915: add intel_lvds->reg

To ditch at least some of the PCH_SPLIT ? PCH_LVDS : LVDS code ...

v2: Rebase on top of Jani Nikula's panel rework.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 20 insertions, 28 deletions

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 31fdbfd48e44..6b6ed642b29f 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -53,6 +53,7 @@ struct intel_lvds_encoder {
         u32 pfit_pgm_ratios;
         bool pfit_dirty;
         bool is_dual_link;
+        u32 reg;
 
         struct intel_lvds_connector *attached_connector;
 };
@@ -72,15 +73,10 @@ static bool intel_lvds_get_hw_state(struct intel_encoder *encoder,
 {
         struct drm_device *dev = encoder->base.dev;
         struct drm_i915_private *dev_priv = dev->dev_private;
-        u32 lvds_reg, tmp;
-
-        if (HAS_PCH_SPLIT(dev)) {
-                lvds_reg = PCH_LVDS;
-        } else {
-                lvds_reg = LVDS;
-        }
+        struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
+        u32 tmp;
 
-        tmp = I915_READ(lvds_reg);
+        tmp = I915_READ(lvds_encoder->reg);
 
         if (!(tmp & LVDS_PORT_EN))
                 return false;
@@ -102,19 +98,17 @@ static void intel_enable_lvds(struct intel_encoder *encoder)
         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
         struct drm_i915_private *dev_priv = dev->dev_private;
-        u32 ctl_reg, lvds_reg, stat_reg;
+        u32 ctl_reg, stat_reg;
 
         if (HAS_PCH_SPLIT(dev)) {
                 ctl_reg = PCH_PP_CONTROL;
-                lvds_reg = PCH_LVDS;
                 stat_reg = PCH_PP_STATUS;
         } else {
                 ctl_reg = PP_CONTROL;
-                lvds_reg = LVDS;
                 stat_reg = PP_STATUS;
         }
 
-        I915_WRITE(lvds_reg, I915_READ(lvds_reg) | LVDS_PORT_EN);
+        I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) | LVDS_PORT_EN);
 
         if (lvds_encoder->pfit_dirty) {
                 /*
@@ -133,7 +127,7 @@ static void intel_enable_lvds(struct intel_encoder *encoder)
         }
 
         I915_WRITE(ctl_reg, I915_READ(ctl_reg) | POWER_TARGET_ON);
-        POSTING_READ(lvds_reg);
+        POSTING_READ(lvds_encoder->reg);
         if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000))
                 DRM_ERROR("timed out waiting for panel to power on\n");
 
@@ -145,15 +139,13 @@ static void intel_disable_lvds(struct intel_encoder *encoder)
         struct drm_device *dev = encoder->base.dev;
         struct intel_lvds_encoder *lvds_encoder = to_lvds_encoder(&encoder->base);
         struct drm_i915_private *dev_priv = dev->dev_private;
-        u32 ctl_reg, lvds_reg, stat_reg;
+        u32 ctl_reg, stat_reg;
 
         if (HAS_PCH_SPLIT(dev)) {
                 ctl_reg = PCH_PP_CONTROL;
-                lvds_reg = PCH_LVDS;
                 stat_reg = PCH_PP_STATUS;
         } else {
                 ctl_reg = PP_CONTROL;
-                lvds_reg = LVDS;
                 stat_reg = PP_STATUS;
         }
 
@@ -168,8 +160,8 @@ static void intel_disable_lvds(struct intel_encoder *encoder)
                 lvds_encoder->pfit_dirty = true;
         }
 
-        I915_WRITE(lvds_reg, I915_READ(lvds_reg) & ~LVDS_PORT_EN);
-        POSTING_READ(lvds_reg);
+        I915_WRITE(lvds_encoder->reg, I915_READ(lvds_encoder->reg) & ~LVDS_PORT_EN);
+        POSTING_READ(lvds_encoder->reg);
 }
 
 static int intel_lvds_mode_valid(struct drm_connector *connector,
@@ -939,17 +931,11 @@ bool intel_is_dual_link_lvds(struct drm_device *dev)
         return false;
 }
 
-static bool compute_is_dual_link_lvds(struct drm_device *dev)
+static bool compute_is_dual_link_lvds(struct intel_lvds_encoder *lvds_encoder)
 {
+        struct drm_device *dev = lvds_encoder->base.base.dev;
         unsigned int val;
         struct drm_i915_private *dev_priv = dev->dev_private;
-        u32 lvds_reg;
-
-        if (HAS_PCH_SPLIT(dev)) {
-                lvds_reg = PCH_LVDS;
-        } else {
-                lvds_reg = LVDS;
-        }
 
         /* use the module option value if specified */
         if (i915_lvds_channel_mode > 0)
@@ -963,7 +949,7 @@ static bool compute_is_dual_link_lvds(struct drm_device *dev)
          * we need to check "the value to be set" in VBT when LVDS
          * register is uninitialized.
          */
-        val = I915_READ(lvds_reg);
+        val = I915_READ(lvds_encoder->reg);
         if (!(val & ~(LVDS_PIPE_MASK | LVDS_DETECTED)))
                 val = dev_priv->bios_lvds_val;
 
@@ -1076,6 +1062,12 @@ bool intel_lvds_init(struct drm_device *dev)
         connector->interlace_allowed = false;
         connector->doublescan_allowed = false;
 
+        if (HAS_PCH_SPLIT(dev)) {
+                lvds_encoder->reg = PCH_LVDS;
+        } else {
+                lvds_encoder->reg = LVDS;
+        }
+
         /* create the scaling mode property */
         drm_mode_create_scaling_mode_property(dev);
         drm_object_attach_property(&connector->base,
@@ -1176,7 +1168,7 @@ bool intel_lvds_init(struct drm_device *dev)
                 goto failed;
 
 out:
-        lvds_encoder->is_dual_link = compute_is_dual_link_lvds(dev);
+        lvds_encoder->is_dual_link = compute_is_dual_link_lvds(lvds_encoder);
         DRM_DEBUG_KMS("detected %s-link lvds configuration\n",
                       lvds_encoder->is_dual_link ? "dual" : "single");