drm/i915: Make downclock deduction common for all panels

If one mode of a internal panel has more than one refresh rate, then a reduced
clock is found for the LFP (LVDS/eDP). This enables switching between low
and high frequency dynamically. Moving downclock calculation to intel_panel
so that it is common for LVDS and eDP.

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
Signed-off-by: Pradeep Bhat <pradeep.bhat@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 5dea389..9f8b465 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -155,6 +155,7 @@ struct intel_encoder {
 
 struct intel_panel {
        struct drm_display_mode *fixed_mode;
+       struct drm_display_mode *downclock_mode;
        int fitting_mode;
 
        /* backlight */
@@ -823,7 +824,10 @@ void intel_panel_disable_backlight(struct intel_connector *connector);
 void intel_panel_destroy_backlight(struct drm_connector *connector);
 void intel_panel_init_backlight_funcs(struct drm_device *dev);
 enum drm_connector_status intel_panel_detect(struct drm_device *dev);
-
+extern struct drm_display_mode *intel_find_panel_downclock(
+                               struct drm_device *dev,
+                               struct drm_display_mode *fixed_mode,
+                               struct drm_connector *connector);
 
 /* intel_pm.c */
 void intel_init_clock_gating(struct drm_device *dev);

diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index 4c8553e..8bcb93a 100644 (file)
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -755,57 +755,6 @@ static const struct dmi_system_id intel_no_lvds[] = {
        { }     /* terminating entry */
 };
 
-/**
- * intel_find_lvds_downclock - find the reduced downclock for LVDS in EDID
- * @dev: drm device
- * @connector: LVDS connector
- *
- * Find the reduced downclock for LVDS in EDID.
- */
-static void intel_find_lvds_downclock(struct drm_device *dev,
-                                     struct drm_display_mode *fixed_mode,
-                                     struct drm_connector *connector)
-{
-       struct drm_i915_private *dev_priv = dev->dev_private;
-       struct drm_display_mode *scan;
-       int temp_downclock;
-
-       temp_downclock = fixed_mode->clock;
-       list_for_each_entry(scan, &connector->probed_modes, head) {
-               /*
-                * If one mode has the same resolution with the fixed_panel
-                * mode while they have the different refresh rate, it means
-                * that the reduced downclock is found for the LVDS. In such
-                * case we can set the different FPx0/1 to dynamically select
-                * between low and high frequency.
-                */
-               if (scan->hdisplay == fixed_mode->hdisplay &&
-                   scan->hsync_start == fixed_mode->hsync_start &&
-                   scan->hsync_end == fixed_mode->hsync_end &&
-                   scan->htotal == fixed_mode->htotal &&
-                   scan->vdisplay == fixed_mode->vdisplay &&
-                   scan->vsync_start == fixed_mode->vsync_start &&
-                   scan->vsync_end == fixed_mode->vsync_end &&
-                   scan->vtotal == fixed_mode->vtotal) {
-                       if (scan->clock < temp_downclock) {
-                               /*
-                                * The downclock is already found. But we
-                                * expect to find the lower downclock.
-                                */
-                               temp_downclock = scan->clock;
-                       }
-               }
-       }
-       if (temp_downclock < fixed_mode->clock && i915_lvds_downclock) {
-               /* We found the downclock for LVDS. */
-               dev_priv->lvds_downclock_avail = 1;
-               dev_priv->lvds_downclock = temp_downclock;
-               DRM_DEBUG_KMS("LVDS downclock is found in EDID. "
-                             "Normal clock %dKhz, downclock %dKhz\n",
-                             fixed_mode->clock, temp_downclock);
-       }
-}
-
 /*
  * Enumerate the child dev array parsed from VBT to check whether
  * the LVDS is present.
@@ -1083,8 +1032,22 @@ void intel_lvds_init(struct drm_device *dev)
 
                        fixed_mode = drm_mode_duplicate(dev, scan);
                        if (fixed_mode) {
-                               intel_find_lvds_downclock(dev, fixed_mode,
-                                                         connector);
+                               intel_connector->panel.downclock_mode =
+                                       intel_find_panel_downclock(dev,
+                                       fixed_mode, connector);
+                               if (intel_connector->panel.downclock_mode !=
+                                       NULL && i915_lvds_downclock) {
+                                       /* We found the downclock for LVDS. */
+                                       dev_priv->lvds_downclock_avail = true;
+                                       dev_priv->lvds_downclock =
+                                               intel_connector->panel.
+                                               downclock_mode->clock;
+                                       DRM_DEBUG_KMS("LVDS downclock is found"
+                                       " in EDID. Normal clock %dKhz, "
+                                       "downclock %dKhz\n",
+                                       fixed_mode->clock,
+                                       dev_priv->lvds_downclock);
+                               }
                                goto out;
                        }
                }

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index e480cf4..b0f6e6c 100644 (file)
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1104,6 +1104,59 @@ void intel_panel_destroy_backlight(struct drm_connector *connector)
        intel_backlight_device_unregister(intel_connector);
 }
 
+/**
+ * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
+ * @dev: drm device
+ * @fixed_mode : panel native mode
+ * @connector: LVDS/eDP connector
+ *
+ * Return downclock_avail
+ * Find the reduced downclock for LVDS/eDP in EDID.
+ */
+struct drm_display_mode *
+intel_find_panel_downclock(struct drm_device *dev,
+                       struct drm_display_mode *fixed_mode,
+                       struct drm_connector *connector)
+{
+       struct drm_display_mode *scan, *tmp_mode;
+       int temp_downclock;
+
+       temp_downclock = fixed_mode->clock;
+       tmp_mode = NULL;
+
+       list_for_each_entry(scan, &connector->probed_modes, head) {
+               /*
+                * If one mode has the same resolution with the fixed_panel
+                * mode while they have the different refresh rate, it means
+                * that the reduced downclock is found. In such
+                * case we can set the different FPx0/1 to dynamically select
+                * between low and high frequency.
+                */
+               if (scan->hdisplay == fixed_mode->hdisplay &&
+                   scan->hsync_start == fixed_mode->hsync_start &&
+                   scan->hsync_end == fixed_mode->hsync_end &&
+                   scan->htotal == fixed_mode->htotal &&
+                   scan->vdisplay == fixed_mode->vdisplay &&
+                   scan->vsync_start == fixed_mode->vsync_start &&
+                   scan->vsync_end == fixed_mode->vsync_end &&
+                   scan->vtotal == fixed_mode->vtotal) {
+                       if (scan->clock < temp_downclock) {
+                               /*
+                                * The downclock is already found. But we
+                                * expect to find the lower downclock.
+                                */
+                               temp_downclock = scan->clock;
+                               tmp_mode = scan;
+                       }
+               }
+       }
+
+       if (temp_downclock < fixed_mode->clock)
+               return drm_mode_duplicate(dev, tmp_mode);
+       else
+               return NULL;
+}
+
 /* Set up chip specific backlight functions */
 void intel_panel_init_backlight_funcs(struct drm_device *dev)
 {
@@ -1157,4 +1210,8 @@ void intel_panel_fini(struct intel_panel *panel)
 
        if (panel->fixed_mode)
                drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);
+
+       if (panel->downclock_mode)
+               drm_mode_destroy(intel_connector->base.dev,
+                               panel->downclock_mode);
 }