drm/i915: split LVDS update code out of i9xx_crtc_mode_set

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / i915 / intel_display.c

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index a7c2ddc96f0e61d8d5696cdbff4fdd3072f680f0..d6a394fdeb264f28f76cb908ac465d66babd3c13 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -5134,6 +5134,62 @@ static void i9xx_update_pll_dividers(struct drm_crtc *crtc,
        }
 }
 
+static void intel_update_lvds(struct drm_crtc *crtc, intel_clock_t *clock,
+                             struct drm_display_mode *adjusted_mode)
+{
+       struct drm_device *dev = crtc->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+       int pipe = intel_crtc->pipe;
+       u32 temp, lvds_sync = 0;
+
+       temp = I915_READ(LVDS);
+       temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
+       if (pipe == 1) {
+               temp |= LVDS_PIPEB_SELECT;
+       } else {
+               temp &= ~LVDS_PIPEB_SELECT;
+       }
+       /* set the corresponsding LVDS_BORDER bit */
+       temp |= dev_priv->lvds_border_bits;
+       /* Set the B0-B3 data pairs corresponding to whether we're going to
+        * set the DPLLs for dual-channel mode or not.
+        */
+       if (clock->p2 == 7)
+               temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
+       else
+               temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
+
+       /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
+        * appropriately here, but we need to look more thoroughly into how
+        * panels behave in the two modes.
+        */
+       /* set the dithering flag on LVDS as needed */
+       if (INTEL_INFO(dev)->gen >= 4) {
+               if (dev_priv->lvds_dither)
+                       temp |= LVDS_ENABLE_DITHER;
+               else
+                       temp &= ~LVDS_ENABLE_DITHER;
+       }
+       if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
+               lvds_sync |= LVDS_HSYNC_POLARITY;
+       if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
+               lvds_sync |= LVDS_VSYNC_POLARITY;
+       if ((temp & (LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY))
+           != lvds_sync) {
+               char flags[2] = "-+";
+               DRM_INFO("Changing LVDS panel from "
+                        "(%chsync, %cvsync) to (%chsync, %cvsync)\n",
+                        flags[!(temp & LVDS_HSYNC_POLARITY)],
+                        flags[!(temp & LVDS_VSYNC_POLARITY)],
+                        flags[!(lvds_sync & LVDS_HSYNC_POLARITY)],
+                        flags[!(lvds_sync & LVDS_VSYNC_POLARITY)]);
+               temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
+               temp |= lvds_sync;
+       }
+       I915_WRITE(LVDS, temp);
+}
+
 static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
                              struct drm_display_mode *mode,
                              struct drm_display_mode *adjusted_mode,
@@ -5155,7 +5211,6 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
        const intel_limit_t *limit;
        int ret;
        u32 temp;
-       u32 lvds_sync = 0;
 
        list_for_each_entry(encoder, &mode_config->encoder_list, base.head) {
                if (encoder->base.crtc != crtc)
@@ -5341,53 +5396,8 @@ static int i9xx_crtc_mode_set(struct drm_crtc *crtc,
         * This is an exception to the general rule that mode_set doesn't turn
         * things on.
         */
-       if (is_lvds) {
-               temp = I915_READ(LVDS);
-               temp |= LVDS_PORT_EN | LVDS_A0A2_CLKA_POWER_UP;
-               if (pipe == 1) {
-                       temp |= LVDS_PIPEB_SELECT;
-               } else {
-                       temp &= ~LVDS_PIPEB_SELECT;
-               }
-               /* set the corresponsding LVDS_BORDER bit */
-               temp |= dev_priv->lvds_border_bits;
-               /* Set the B0-B3 data pairs corresponding to whether we're going to
-                * set the DPLLs for dual-channel mode or not.
-                */
-               if (clock.p2 == 7)
-                       temp |= LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP;
-               else
-                       temp &= ~(LVDS_B0B3_POWER_UP | LVDS_CLKB_POWER_UP);
-
-               /* It would be nice to set 24 vs 18-bit mode (LVDS_A3_POWER_UP)
-                * appropriately here, but we need to look more thoroughly into how
-                * panels behave in the two modes.
-                */
-               /* set the dithering flag on LVDS as needed */
-               if (INTEL_INFO(dev)->gen >= 4) {
-                       if (dev_priv->lvds_dither)
-                               temp |= LVDS_ENABLE_DITHER;
-                       else
-                               temp &= ~LVDS_ENABLE_DITHER;
-               }
-               if (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC)
-                       lvds_sync |= LVDS_HSYNC_POLARITY;
-               if (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC)
-                       lvds_sync |= LVDS_VSYNC_POLARITY;
-               if ((temp & (LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY))
-                   != lvds_sync) {
-                       char flags[2] = "-+";
-                       DRM_INFO("Changing LVDS panel from "
-                                "(%chsync, %cvsync) to (%chsync, %cvsync)\n",
-                                flags[!(temp & LVDS_HSYNC_POLARITY)],
-                                flags[!(temp & LVDS_VSYNC_POLARITY)],
-                                flags[!(lvds_sync & LVDS_HSYNC_POLARITY)],
-                                flags[!(lvds_sync & LVDS_VSYNC_POLARITY)]);
-                       temp &= ~(LVDS_HSYNC_POLARITY | LVDS_VSYNC_POLARITY);
-                       temp |= lvds_sync;
-               }
-               I915_WRITE(LVDS, temp);
-       }
+       if (intel_pipe_has_type(crtc, INTEL_OUTPUT_LVDS))
+               intel_update_lvds(crtc, &clock, adjusted_mode);
 
        if (is_dp) {
                intel_dp_set_m_n(crtc, mode, adjusted_mode);