drm/i915: panel power sequencing for VLV eDP v2

PPS register offsets have changed in Valleyview.

v2: don't clobber port select bits on VLV when fixing up PPS timings
    don't bother with G4x PPS regs (Jani)

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Gajanan Bhat <gajanan.bhat@intel.com>
Signed-off-by: Vijay Purushothaman <vijay.a.purushothaman@intel.com>
Signed-off-by: Ben Widawsky <benjamin.widawsky@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 122 insertions, 51 deletions

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index eb783925b28c..64c8d3ed8d0f 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -274,16 +274,20 @@ static bool ironlake_edp_have_panel_power(struct intel_dp *intel_dp)
 {
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
+        u32 pp_stat_reg;
 
-        return (I915_READ(PCH_PP_STATUS) & PP_ON) != 0;
+        pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
+        return (I915_READ(pp_stat_reg) & PP_ON) != 0;
 }
 
 static bool ironlake_edp_have_panel_vdd(struct intel_dp *intel_dp)
 {
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
+        u32 pp_ctrl_reg;
 
-        return (I915_READ(PCH_PP_CONTROL) & EDP_FORCE_VDD) != 0;
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+        return (I915_READ(pp_ctrl_reg) & EDP_FORCE_VDD) != 0;
 }
 
 static void
@@ -291,14 +295,19 @@ intel_dp_check_edp(struct intel_dp *intel_dp)
 {
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
+        u32 pp_stat_reg, pp_ctrl_reg;
 
         if (!is_edp(intel_dp))
                 return;
+
+        pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+
         if (!ironlake_edp_have_panel_power(intel_dp) && !ironlake_edp_have_panel_vdd(intel_dp)) {
                 WARN(1, "eDP powered off while attempting aux channel communication.\n");
                 DRM_DEBUG_KMS("Status 0x%08x Control 0x%08x\n",
-                              I915_READ(PCH_PP_STATUS),
-                              I915_READ(PCH_PP_CONTROL));
+                                I915_READ(pp_stat_reg),
+                                I915_READ(pp_ctrl_reg));
         }
 }
 
@@ -981,16 +990,20 @@ static void ironlake_wait_panel_status(struct intel_dp *intel_dp,
 {
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
+        u32 pp_stat_reg, pp_ctrl_reg;
+
+        pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
 
         DRM_DEBUG_KMS("mask %08x value %08x status %08x control %08x\n",
-                      mask, value,
-                      I915_READ(PCH_PP_STATUS),
-                      I915_READ(PCH_PP_CONTROL));
+                        mask, value,
+                        I915_READ(pp_stat_reg),
+                        I915_READ(pp_ctrl_reg));
 
-        if (_wait_for((I915_READ(PCH_PP_STATUS) & mask) == value, 5000, 10)) {
+        if (_wait_for((I915_READ(pp_stat_reg) & mask) == value, 5000, 10)) {
                 DRM_ERROR("Panel status timeout: status %08x control %08x\n",
-                          I915_READ(PCH_PP_STATUS),
-                          I915_READ(PCH_PP_CONTROL));
+                                I915_READ(pp_stat_reg),
+                                I915_READ(pp_ctrl_reg));
         }
 }
 
@@ -1017,9 +1030,15 @@ static void ironlake_wait_panel_power_cycle(struct intel_dp *intel_dp)
  * is locked
  */
 
-static  u32 ironlake_get_pp_control(struct drm_i915_private *dev_priv)
+static  u32 ironlake_get_pp_control(struct intel_dp *intel_dp)
 {
-        u32     control = I915_READ(PCH_PP_CONTROL);
+        struct drm_device *dev = intel_dp_to_dev(intel_dp);
+        struct drm_i915_private *dev_priv = dev->dev_private;
+        u32 control;
+        u32 pp_ctrl_reg;
+
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+        control = I915_READ(pp_ctrl_reg);
 
         control &= ~PANEL_UNLOCK_MASK;
         control |= PANEL_UNLOCK_REGS;
@@ -1031,6 +1050,7 @@ void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp)
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
         u32 pp;
+        u32 pp_stat_reg, pp_ctrl_reg;
 
         if (!is_edp(intel_dp))
                 return;
@@ -1049,13 +1069,16 @@ void ironlake_edp_panel_vdd_on(struct intel_dp *intel_dp)
         if (!ironlake_edp_have_panel_power(intel_dp))
                 ironlake_wait_panel_power_cycle(intel_dp);
 
-        pp = ironlake_get_pp_control(dev_priv);
+        pp = ironlake_get_pp_control(intel_dp);
         pp |= EDP_FORCE_VDD;
-        I915_WRITE(PCH_PP_CONTROL, pp);
-        POSTING_READ(PCH_PP_CONTROL);
-        DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n",
-                      I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL));
 
+        pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+
+        I915_WRITE(pp_ctrl_reg, pp);
+        POSTING_READ(pp_ctrl_reg);
+        DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
+                        I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
         /*
          * If the panel wasn't on, delay before accessing aux channel
          */
@@ -1070,19 +1093,23 @@ static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp)
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
         u32 pp;
+        u32 pp_stat_reg, pp_ctrl_reg;
 
         WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
 
         if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) {
-                pp = ironlake_get_pp_control(dev_priv);
+                pp = ironlake_get_pp_control(intel_dp);
                 pp &= ~EDP_FORCE_VDD;
-                I915_WRITE(PCH_PP_CONTROL, pp);
-                POSTING_READ(PCH_PP_CONTROL);
 
-                /* Make sure sequencer is idle before allowing subsequent activity */
-                DRM_DEBUG_KMS("PCH_PP_STATUS: 0x%08x PCH_PP_CONTROL: 0x%08x\n",
-                              I915_READ(PCH_PP_STATUS), I915_READ(PCH_PP_CONTROL));
+                pp_stat_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_STATUS : PCH_PP_STATUS;
+                pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+
+                I915_WRITE(pp_ctrl_reg, pp);
+                POSTING_READ(pp_ctrl_reg);
 
+                /* Make sure sequencer is idle before allowing subsequent activity */
+                DRM_DEBUG_KMS("PP_STATUS: 0x%08x PP_CONTROL: 0x%08x\n",
+                I915_READ(pp_stat_reg), I915_READ(pp_ctrl_reg));
                 msleep(intel_dp->panel_power_down_delay);
         }
 }
@@ -1126,6 +1153,7 @@ void ironlake_edp_panel_on(struct intel_dp *intel_dp)
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
         u32 pp;
+        u32 pp_ctrl_reg;
 
         if (!is_edp(intel_dp))
                 return;
@@ -1139,7 +1167,7 @@ void ironlake_edp_panel_on(struct intel_dp *intel_dp)
 
         ironlake_wait_panel_power_cycle(intel_dp);
 
-        pp = ironlake_get_pp_control(dev_priv);
+        pp = ironlake_get_pp_control(intel_dp);
         if (IS_GEN5(dev)) {
                 /* ILK workaround: disable reset around power sequence */
                 pp &= ~PANEL_POWER_RESET;
@@ -1151,8 +1179,10 @@ void ironlake_edp_panel_on(struct intel_dp *intel_dp)
         if (!IS_GEN5(dev))
                 pp |= PANEL_POWER_RESET;
 
-        I915_WRITE(PCH_PP_CONTROL, pp);
-        POSTING_READ(PCH_PP_CONTROL);
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+
+        I915_WRITE(pp_ctrl_reg, pp);
+        POSTING_READ(pp_ctrl_reg);
 
         ironlake_wait_panel_on(intel_dp);
 
@@ -1168,6 +1198,7 @@ void ironlake_edp_panel_off(struct intel_dp *intel_dp)
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
         u32 pp;
+        u32 pp_ctrl_reg;
 
         if (!is_edp(intel_dp))
                 return;
@@ -1176,12 +1207,15 @@ void ironlake_edp_panel_off(struct intel_dp *intel_dp)
 
         WARN(!intel_dp->want_panel_vdd, "Need VDD to turn off panel\n");
 
-        pp = ironlake_get_pp_control(dev_priv);
+        pp = ironlake_get_pp_control(intel_dp);
         /* We need to switch off panel power _and_ force vdd, for otherwise some
          * panels get very unhappy and cease to work. */
         pp &= ~(POWER_TARGET_ON | EDP_FORCE_VDD | PANEL_POWER_RESET | EDP_BLC_ENABLE);
-        I915_WRITE(PCH_PP_CONTROL, pp);
-        POSTING_READ(PCH_PP_CONTROL);
+
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+
+        I915_WRITE(pp_ctrl_reg, pp);
+        POSTING_READ(pp_ctrl_reg);
 
         intel_dp->want_panel_vdd = false;
 
@@ -1195,6 +1229,7 @@ void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
         struct drm_i915_private *dev_priv = dev->dev_private;
         int pipe = to_intel_crtc(intel_dig_port->base.base.crtc)->pipe;
         u32 pp;
+        u32 pp_ctrl_reg;
 
         if (!is_edp(intel_dp))
                 return;
@@ -1207,10 +1242,13 @@ void ironlake_edp_backlight_on(struct intel_dp *intel_dp)
          * allowing it to appear.
          */
         msleep(intel_dp->backlight_on_delay);
-        pp = ironlake_get_pp_control(dev_priv);
+        pp = ironlake_get_pp_control(intel_dp);
         pp |= EDP_BLC_ENABLE;
-        I915_WRITE(PCH_PP_CONTROL, pp);
-        POSTING_READ(PCH_PP_CONTROL);
+
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+
+        I915_WRITE(pp_ctrl_reg, pp);
+        POSTING_READ(pp_ctrl_reg);
 
         intel_panel_enable_backlight(dev, pipe);
 }
@@ -1220,6 +1258,7 @@ void ironlake_edp_backlight_off(struct intel_dp *intel_dp)
         struct drm_device *dev = intel_dp_to_dev(intel_dp);
         struct drm_i915_private *dev_priv = dev->dev_private;
         u32 pp;
+        u32 pp_ctrl_reg;
 
         if (!is_edp(intel_dp))
                 return;
@@ -1227,10 +1266,13 @@ void ironlake_edp_backlight_off(struct intel_dp *intel_dp)
         intel_panel_disable_backlight(dev);
 
         DRM_DEBUG_KMS("\n");
-        pp = ironlake_get_pp_control(dev_priv);
+        pp = ironlake_get_pp_control(intel_dp);
         pp &= ~EDP_BLC_ENABLE;
-        I915_WRITE(PCH_PP_CONTROL, pp);
-        POSTING_READ(PCH_PP_CONTROL);
+
+        pp_ctrl_reg = IS_VALLEYVIEW(dev) ? PIPEA_PP_CONTROL : PCH_PP_CONTROL;
+
+        I915_WRITE(pp_ctrl_reg, pp);
+        POSTING_READ(pp_ctrl_reg);
         msleep(intel_dp->backlight_off_delay);
 }
 
@@ -2620,15 +2662,28 @@ intel_dp_init_panel_power_sequencer(struct drm_device *dev,
         struct drm_i915_private *dev_priv = dev->dev_private;
         struct edp_power_seq cur, vbt, spec, final;
         u32 pp_on, pp_off, pp_div, pp;
+        int pp_control_reg, pp_on_reg, pp_off_reg, pp_div_reg;
+
+        if (HAS_PCH_SPLIT(dev)) {
+                pp_control_reg = PCH_PP_CONTROL;
+                pp_on_reg = PCH_PP_ON_DELAYS;
+                pp_off_reg = PCH_PP_OFF_DELAYS;
+                pp_div_reg = PCH_PP_DIVISOR;
+        } else {
+                pp_control_reg = PIPEA_PP_CONTROL;
+                pp_on_reg = PIPEA_PP_ON_DELAYS;
+                pp_off_reg = PIPEA_PP_OFF_DELAYS;
+                pp_div_reg = PIPEA_PP_DIVISOR;
+        }
 
         /* Workaround: Need to write PP_CONTROL with the unlock key as
          * the very first thing. */
-        pp = ironlake_get_pp_control(dev_priv);
-        I915_WRITE(PCH_PP_CONTROL, pp);
+        pp = ironlake_get_pp_control(intel_dp);
+        I915_WRITE(pp_control_reg, pp);
 
-        pp_on = I915_READ(PCH_PP_ON_DELAYS);
-        pp_off = I915_READ(PCH_PP_OFF_DELAYS);
-        pp_div = I915_READ(PCH_PP_DIVISOR);
+        pp_on = I915_READ(pp_on_reg);
+        pp_off = I915_READ(pp_off_reg);
+        pp_div = I915_READ(pp_div_reg);
 
         /* Pull timing values out of registers */
         cur.t1_t3 = (pp_on & PANEL_POWER_UP_DELAY_MASK) >>
@@ -2703,7 +2758,22 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
                                               struct edp_power_seq *seq)
 {
         struct drm_i915_private *dev_priv = dev->dev_private;
-        u32 pp_on, pp_off, pp_div;
+        u32 pp_on, pp_off, pp_div, port_sel = 0;
+        int div = HAS_PCH_SPLIT(dev) ? intel_pch_rawclk(dev) : intel_hrawclk(dev);
+        int pp_on_reg, pp_off_reg, pp_div_reg;
+
+        if (HAS_PCH_SPLIT(dev)) {
+                pp_on_reg = PCH_PP_ON_DELAYS;
+                pp_off_reg = PCH_PP_OFF_DELAYS;
+                pp_div_reg = PCH_PP_DIVISOR;
+        } else {
+                pp_on_reg = PIPEA_PP_ON_DELAYS;
+                pp_off_reg = PIPEA_PP_OFF_DELAYS;
+                pp_div_reg = PIPEA_PP_DIVISOR;
+        }
+
+        if (IS_VALLEYVIEW(dev))
+                port_sel = I915_READ(pp_on_reg) & 0xc0000000;
 
         /* And finally store the new values in the power sequencer. */
         pp_on = (seq->t1_t3 << PANEL_POWER_UP_DELAY_SHIFT) |
@@ -2712,8 +2782,7 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
                  (seq->t10 << PANEL_POWER_DOWN_DELAY_SHIFT);
         /* Compute the divisor for the pp clock, simply match the Bspec
          * formula. */
-        pp_div = ((100 * intel_pch_rawclk(dev))/2 - 1)
-                        << PP_REFERENCE_DIVIDER_SHIFT;
+        pp_div = ((100 * div)/2 - 1) << PP_REFERENCE_DIVIDER_SHIFT;
         pp_div |= (DIV_ROUND_UP(seq->t11_t12, 1000)
                         << PANEL_POWER_CYCLE_DELAY_SHIFT);
 
@@ -2721,19 +2790,21 @@ intel_dp_init_panel_power_sequencer_registers(struct drm_device *dev,
          * power sequencer any more. */
         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) {
                 if (is_cpu_edp(intel_dp))
-                        pp_on |= PANEL_POWER_PORT_DP_A;
+                        port_sel = PANEL_POWER_PORT_DP_A;
                 else
-                        pp_on |= PANEL_POWER_PORT_DP_D;
+                        port_sel = PANEL_POWER_PORT_DP_D;
         }
 
-        I915_WRITE(PCH_PP_ON_DELAYS, pp_on);
-        I915_WRITE(PCH_PP_OFF_DELAYS, pp_off);
-        I915_WRITE(PCH_PP_DIVISOR, pp_div);
+        pp_on |= port_sel;
+
+        I915_WRITE(pp_on_reg, pp_on);
+        I915_WRITE(pp_off_reg, pp_off);
+        I915_WRITE(pp_div_reg, pp_div);
 
         DRM_DEBUG_KMS("panel power sequencer register settings: PP_ON %#x, PP_OFF %#x, PP_DIV %#x\n",
-                      I915_READ(PCH_PP_ON_DELAYS),
-                      I915_READ(PCH_PP_OFF_DELAYS),
-                      I915_READ(PCH_PP_DIVISOR));
+                      I915_READ(pp_on_reg),
+                      I915_READ(pp_off_reg),
+                      I915_READ(pp_div_reg));
 }
 
 void