drm/i915: Split g4x_crtc_compute_clock()

Split a G4X specific version from i9xx_crtc_compute_clock(). With this
the differences between platforms become more obvious.

Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458576016-30348-15-git-send-email-ander.conselvan.de.oliveira@intel.com

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 611757a..2764ade 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -565,40 +565,16 @@ static bool intel_pipe_will_have_type(const struct intel_crtc_state *crtc_state,
 }
 
 static const intel_limit_t *
-intel_g4x_limit(struct intel_crtc_state *crtc_state)
-{
-       struct drm_device *dev = crtc_state->base.crtc->dev;
-       const intel_limit_t *limit;
-
-       if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_LVDS)) {
-               if (intel_is_dual_link_lvds(dev))
-                       limit = &intel_limits_g4x_dual_channel_lvds;
-               else
-                       limit = &intel_limits_g4x_single_channel_lvds;
-       } else if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_HDMI) ||
-                  intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
-               limit = &intel_limits_g4x_hdmi;
-       } else if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_SDVO)) {
-               limit = &intel_limits_g4x_sdvo;
-       } else /* The option is for other outputs */
-               limit = &intel_limits_i9xx_sdvo;
-
-       return limit;
-}
-
-static const intel_limit_t *
 intel_limit(struct intel_crtc_state *crtc_state, int refclk)
 {
        struct drm_device *dev = crtc_state->base.crtc->dev;
        const intel_limit_t *limit;
 
        if (IS_BROXTON(dev) || IS_CHERRYVIEW(dev) || IS_VALLEYVIEW(dev) ||
-           HAS_PCH_SPLIT(dev) || IS_GEN2(dev))
+           HAS_PCH_SPLIT(dev) || IS_G4X(dev) || IS_GEN2(dev))
                limit = NULL;
 
-       if (IS_G4X(dev)) {
-               limit = intel_g4x_limit(crtc_state);
-       } else if (IS_PINEVIEW(dev)) {
+       if (IS_PINEVIEW(dev)) {
                if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_LVDS))
                        limit = &intel_limits_pineview_lvds;
                else
@@ -7830,6 +7806,49 @@ static int i8xx_crtc_compute_clock(struct intel_crtc *crtc,
        return 0;
 }
 
+static int g4x_crtc_compute_clock(struct intel_crtc *crtc,
+                                 struct intel_crtc_state *crtc_state)
+{
+       struct drm_device *dev = crtc->base.dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       const intel_limit_t *limit;
+       int refclk = 96000;
+
+       memset(&crtc_state->dpll_hw_state, 0,
+              sizeof(crtc_state->dpll_hw_state));
+
+       if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+               if (intel_panel_use_ssc(dev_priv)) {
+                       refclk = dev_priv->vbt.lvds_ssc_freq;
+                       DRM_DEBUG_KMS("using SSC reference clock of %d kHz\n", refclk);
+               }
+
+               if (intel_is_dual_link_lvds(dev))
+                       limit = &intel_limits_g4x_dual_channel_lvds;
+               else
+                       limit = &intel_limits_g4x_single_channel_lvds;
+       } else if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_HDMI) ||
+                  intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
+               limit = &intel_limits_g4x_hdmi;
+       } else if (intel_pipe_will_have_type(crtc_state, INTEL_OUTPUT_SDVO)) {
+               limit = &intel_limits_g4x_sdvo;
+       } else {
+               /* The option is for other outputs */
+               limit = &intel_limits_i9xx_sdvo;
+       }
+
+       if (!crtc_state->clock_set &&
+           !g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+                               refclk, NULL, &crtc_state->dpll)) {
+               DRM_ERROR("Couldn't find PLL settings for mode!\n");
+               return -EINVAL;
+       }
+
+       i9xx_compute_dpll(crtc, crtc_state, NULL);
+
+       return 0;
+}
+
 static int i9xx_crtc_compute_clock(struct intel_crtc *crtc,
                                   struct intel_crtc_state *crtc_state)
 {
@@ -14781,9 +14800,7 @@ static const struct drm_mode_config_funcs intel_mode_funcs = {
  */
 void intel_init_display_hooks(struct drm_i915_private *dev_priv)
 {
-       if (HAS_PCH_SPLIT(dev_priv) || IS_G4X(dev_priv))
-               dev_priv->display.find_dpll = g4x_find_best_dpll;
-       else if (IS_PINEVIEW(dev_priv))
+       if (IS_PINEVIEW(dev_priv))
                dev_priv->display.find_dpll = pnv_find_best_dpll;
        else
                dev_priv->display.find_dpll = i9xx_find_best_dpll;
@@ -14826,6 +14843,13 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
                dev_priv->display.crtc_compute_clock = vlv_crtc_compute_clock;
                dev_priv->display.crtc_enable = valleyview_crtc_enable;
                dev_priv->display.crtc_disable = i9xx_crtc_disable;
+       } else if (IS_G4X(dev_priv)) {
+               dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
+               dev_priv->display.get_initial_plane_config =
+                       i9xx_get_initial_plane_config;
+               dev_priv->display.crtc_compute_clock = g4x_crtc_compute_clock;
+               dev_priv->display.crtc_enable = i9xx_crtc_enable;
+               dev_priv->display.crtc_disable = i9xx_crtc_disable;
        } else if (!IS_GEN2(dev_priv)) {
                dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
                dev_priv->display.get_initial_plane_config =