]> git.kernelconcepts.de Git - karo-tx-linux.git/blobdiff - drivers/gpu/drm/i915/intel_display.c
drm/i915: flush cursors harder
[karo-tx-linux.git] / drivers / gpu / drm / i915 / intel_display.c
index 42b1c755d676fbb489ca79f1bf7466d265d6b8da..c9882e816af8084c824f8f426ba5f8ce8b8c1e83 100644 (file)
@@ -2156,7 +2156,7 @@ static int ironlake_update_plane(struct drm_crtc *crtc,
        else
                dspcntr &= ~DISPPLANE_TILED;
 
-       if (IS_HASWELL(dev))
+       if (IS_HASWELL(dev) || IS_BROADWELL(dev))
                dspcntr &= ~DISPPLANE_TRICKLE_FEED_DISABLE;
        else
                dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
@@ -2176,7 +2176,7 @@ static int ironlake_update_plane(struct drm_crtc *crtc,
        I915_WRITE(DSPSTRIDE(plane), fb->pitches[0]);
        I915_MODIFY_DISPBASE(DSPSURF(plane),
                             i915_gem_obj_ggtt_offset(obj) + intel_crtc->dspaddr_offset);
-       if (IS_HASWELL(dev)) {
+       if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
                I915_WRITE(DSPOFFSET(plane), (y << 16) | x);
        } else {
                I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
@@ -2421,9 +2421,10 @@ static void intel_fdi_normal_train(struct drm_crtc *crtc)
                           FDI_FE_ERRC_ENABLE);
 }
 
-static bool pipe_has_enabled_pch(struct intel_crtc *intel_crtc)
+static bool pipe_has_enabled_pch(struct intel_crtc *crtc)
 {
-       return intel_crtc->base.enabled && intel_crtc->config.has_pch_encoder;
+       return crtc->base.enabled && crtc->active &&
+               crtc->config.has_pch_encoder;
 }
 
 static void ivb_modeset_global_resources(struct drm_device *dev)
@@ -3074,6 +3075,48 @@ static void ironlake_pch_transcoder_set_timings(struct intel_crtc *crtc,
                   I915_READ(VSYNCSHIFT(cpu_transcoder)));
 }
 
+static void cpt_enable_fdi_bc_bifurcation(struct drm_device *dev)
+{
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       uint32_t temp;
+
+       temp = I915_READ(SOUTH_CHICKEN1);
+       if (temp & FDI_BC_BIFURCATION_SELECT)
+               return;
+
+       WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
+       WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
+
+       temp |= FDI_BC_BIFURCATION_SELECT;
+       DRM_DEBUG_KMS("enabling fdi C rx\n");
+       I915_WRITE(SOUTH_CHICKEN1, temp);
+       POSTING_READ(SOUTH_CHICKEN1);
+}
+
+static void ivybridge_update_fdi_bc_bifurcation(struct intel_crtc *intel_crtc)
+{
+       struct drm_device *dev = intel_crtc->base.dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+
+       switch (intel_crtc->pipe) {
+       case PIPE_A:
+               break;
+       case PIPE_B:
+               if (intel_crtc->config.fdi_lanes > 2)
+                       WARN_ON(I915_READ(SOUTH_CHICKEN1) & FDI_BC_BIFURCATION_SELECT);
+               else
+                       cpt_enable_fdi_bc_bifurcation(dev);
+
+               break;
+       case PIPE_C:
+               cpt_enable_fdi_bc_bifurcation(dev);
+
+               break;
+       default:
+               BUG();
+       }
+}
+
 /*
  * Enable PCH resources required for PCH ports:
  *   - PCH PLLs
@@ -3092,6 +3135,9 @@ static void ironlake_pch_enable(struct drm_crtc *crtc)
 
        assert_pch_transcoder_disabled(dev_priv, pipe);
 
+       if (IS_IVYBRIDGE(dev))
+               ivybridge_update_fdi_bc_bifurcation(intel_crtc);
+
        /* Write the TU size bits before fdi link training, so that error
         * detection works. */
        I915_WRITE(FDI_RX_TUSIZE1(pipe),
@@ -3347,15 +3393,26 @@ void hsw_enable_ips(struct intel_crtc *crtc)
         * only after intel_enable_plane. And intel_enable_plane already waits
         * for a vblank, so all we need to do here is to enable the IPS bit. */
        assert_plane_enabled(dev_priv, crtc->plane);
-       I915_WRITE(IPS_CTL, IPS_ENABLE);
-
-       /* The bit only becomes 1 in the next vblank, so this wait here is
-        * essentially intel_wait_for_vblank. If we don't have this and don't
-        * wait for vblanks until the end of crtc_enable, then the HW state
-        * readout code will complain that the expected IPS_CTL value is not the
-        * one we read. */
-       if (wait_for(I915_READ_NOTRACE(IPS_CTL) & IPS_ENABLE, 50))
-               DRM_ERROR("Timed out waiting for IPS enable\n");
+       if (IS_BROADWELL(crtc->base.dev)) {
+               mutex_lock(&dev_priv->rps.hw_lock);
+               WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0xc0000000));
+               mutex_unlock(&dev_priv->rps.hw_lock);
+               /* Quoting Art Runyan: "its not safe to expect any particular
+                * value in IPS_CTL bit 31 after enabling IPS through the
+                * mailbox." Therefore we need to defer waiting on the state
+                * change.
+                * TODO: need to fix this for state checker
+                */
+       } else {
+               I915_WRITE(IPS_CTL, IPS_ENABLE);
+               /* The bit only becomes 1 in the next vblank, so this wait here
+                * is essentially intel_wait_for_vblank. If we don't have this
+                * and don't wait for vblanks until the end of crtc_enable, then
+                * the HW state readout code will complain that the expected
+                * IPS_CTL value is not the one we read. */
+               if (wait_for(I915_READ_NOTRACE(IPS_CTL) & IPS_ENABLE, 50))
+                       DRM_ERROR("Timed out waiting for IPS enable\n");
+       }
 }
 
 void hsw_disable_ips(struct intel_crtc *crtc)
@@ -3367,7 +3424,12 @@ void hsw_disable_ips(struct intel_crtc *crtc)
                return;
 
        assert_plane_enabled(dev_priv, crtc->plane);
-       I915_WRITE(IPS_CTL, 0);
+       if (IS_BROADWELL(crtc->base.dev)) {
+               mutex_lock(&dev_priv->rps.hw_lock);
+               WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0));
+               mutex_unlock(&dev_priv->rps.hw_lock);
+       } else
+               I915_WRITE(IPS_CTL, 0);
        POSTING_READ(IPS_CTL);
 
        /* We need to wait for a vblank before we can disable the plane. */
@@ -4156,8 +4218,6 @@ static void intel_connector_check_state(struct intel_connector *connector)
  * consider. */
 void intel_connector_dpms(struct drm_connector *connector, int mode)
 {
-       struct intel_encoder *encoder = intel_attached_encoder(connector);
-
        /* All the simple cases only support two dpms states. */
        if (mode != DRM_MODE_DPMS_ON)
                mode = DRM_MODE_DPMS_OFF;
@@ -4168,10 +4228,8 @@ void intel_connector_dpms(struct drm_connector *connector, int mode)
        connector->dpms = mode;
 
        /* Only need to change hw state when actually enabled */
-       if (encoder->base.crtc)
-               intel_encoder_dpms(encoder, mode);
-       else
-               WARN_ON(encoder->connectors_active != false);
+       if (connector->encoder)
+               intel_encoder_dpms(to_intel_encoder(connector->encoder), mode);
 
        intel_modeset_check_state(connector->dev);
 }
@@ -4202,7 +4260,7 @@ static bool ironlake_check_fdi_lanes(struct drm_device *dev, enum pipe pipe,
                return false;
        }
 
-       if (IS_HASWELL(dev)) {
+       if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
                if (pipe_config->fdi_lanes > 2) {
                        DRM_DEBUG_KMS("only 2 lanes on haswell, required: %i lanes\n",
                                      pipe_config->fdi_lanes);
@@ -5776,14 +5834,16 @@ static void intel_set_pipe_csc(struct drm_crtc *crtc)
 
 static void haswell_set_pipeconf(struct drm_crtc *crtc)
 {
-       struct drm_i915_private *dev_priv = crtc->dev->dev_private;
+       struct drm_device *dev = crtc->dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+       enum pipe pipe = intel_crtc->pipe;
        enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
        uint32_t val;
 
        val = 0;
 
-       if (intel_crtc->config.dither)
+       if (IS_HASWELL(dev) && intel_crtc->config.dither)
                val |= (PIPECONF_DITHER_EN | PIPECONF_DITHER_TYPE_SP);
 
        if (intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
@@ -5796,6 +5856,33 @@ static void haswell_set_pipeconf(struct drm_crtc *crtc)
 
        I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT);
        POSTING_READ(GAMMA_MODE(intel_crtc->pipe));
+
+       if (IS_BROADWELL(dev)) {
+               val = 0;
+
+               switch (intel_crtc->config.pipe_bpp) {
+               case 18:
+                       val |= PIPEMISC_DITHER_6_BPC;
+                       break;
+               case 24:
+                       val |= PIPEMISC_DITHER_8_BPC;
+                       break;
+               case 30:
+                       val |= PIPEMISC_DITHER_10_BPC;
+                       break;
+               case 36:
+                       val |= PIPEMISC_DITHER_12_BPC;
+                       break;
+               default:
+                       /* Case prevented by pipe_config_set_bpp. */
+                       BUG();
+               }
+
+               if (intel_crtc->config.dither)
+                       val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP;
+
+               I915_WRITE(PIPEMISC(pipe), val);
+       }
 }
 
 static bool ironlake_compute_clocks(struct drm_crtc *crtc,
@@ -5849,48 +5936,6 @@ static bool ironlake_compute_clocks(struct drm_crtc *crtc,
        return true;
 }
 
-static void cpt_enable_fdi_bc_bifurcation(struct drm_device *dev)
-{
-       struct drm_i915_private *dev_priv = dev->dev_private;
-       uint32_t temp;
-
-       temp = I915_READ(SOUTH_CHICKEN1);
-       if (temp & FDI_BC_BIFURCATION_SELECT)
-               return;
-
-       WARN_ON(I915_READ(FDI_RX_CTL(PIPE_B)) & FDI_RX_ENABLE);
-       WARN_ON(I915_READ(FDI_RX_CTL(PIPE_C)) & FDI_RX_ENABLE);
-
-       temp |= FDI_BC_BIFURCATION_SELECT;
-       DRM_DEBUG_KMS("enabling fdi C rx\n");
-       I915_WRITE(SOUTH_CHICKEN1, temp);
-       POSTING_READ(SOUTH_CHICKEN1);
-}
-
-static void ivybridge_update_fdi_bc_bifurcation(struct intel_crtc *intel_crtc)
-{
-       struct drm_device *dev = intel_crtc->base.dev;
-       struct drm_i915_private *dev_priv = dev->dev_private;
-
-       switch (intel_crtc->pipe) {
-       case PIPE_A:
-               break;
-       case PIPE_B:
-               if (intel_crtc->config.fdi_lanes > 2)
-                       WARN_ON(I915_READ(SOUTH_CHICKEN1) & FDI_BC_BIFURCATION_SELECT);
-               else
-                       cpt_enable_fdi_bc_bifurcation(dev);
-
-               break;
-       case PIPE_C:
-               cpt_enable_fdi_bc_bifurcation(dev);
-
-               break;
-       default:
-               BUG();
-       }
-}
-
 int ironlake_get_lanes_required(int target_clock, int link_bw, int bpp)
 {
        /*
@@ -6072,11 +6117,6 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
        else
                intel_crtc->lowfreq_avail = false;
 
-       if (intel_crtc->config.has_pch_encoder) {
-               pll = intel_crtc_to_shared_dpll(intel_crtc);
-
-       }
-
        intel_set_pipe_timings(intel_crtc);
 
        if (intel_crtc->config.has_pch_encoder) {
@@ -6084,9 +6124,6 @@ static int ironlake_crtc_mode_set(struct drm_crtc *crtc,
                                             &intel_crtc->config.fdi_m_n);
        }
 
-       if (IS_IVYBRIDGE(dev))
-               ivybridge_update_fdi_bc_bifurcation(intel_crtc);
-
        ironlake_set_pipeconf(crtc);
 
        /* Set up the display plane register */
@@ -6562,22 +6599,79 @@ static void hsw_package_c8_gpu_busy(struct drm_i915_private *dev_priv)
        }
 }
 
-static void haswell_modeset_global_resources(struct drm_device *dev)
+#define for_each_power_domain(domain, mask)                            \
+       for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++)     \
+               if ((1 << (domain)) & (mask))
+
+static unsigned long get_pipe_power_domains(struct drm_device *dev,
+                                           enum pipe pipe, bool pfit_enabled)
 {
-       bool enable = false;
+       unsigned long mask;
+       enum transcoder transcoder;
+
+       transcoder = intel_pipe_to_cpu_transcoder(dev->dev_private, pipe);
+
+       mask = BIT(POWER_DOMAIN_PIPE(pipe));
+       mask |= BIT(POWER_DOMAIN_TRANSCODER(transcoder));
+       if (pfit_enabled)
+               mask |= BIT(POWER_DOMAIN_PIPE_PANEL_FITTER(pipe));
+
+       return mask;
+}
+
+void intel_display_set_init_power(struct drm_device *dev, bool enable)
+{
+       struct drm_i915_private *dev_priv = dev->dev_private;
+
+       if (dev_priv->power_domains.init_power_on == enable)
+               return;
+
+       if (enable)
+               intel_display_power_get(dev, POWER_DOMAIN_INIT);
+       else
+               intel_display_power_put(dev, POWER_DOMAIN_INIT);
+
+       dev_priv->power_domains.init_power_on = enable;
+}
+
+static void modeset_update_power_wells(struct drm_device *dev)
+{
+       unsigned long pipe_domains[I915_MAX_PIPES] = { 0, };
        struct intel_crtc *crtc;
 
+       /*
+        * First get all needed power domains, then put all unneeded, to avoid
+        * any unnecessary toggling of the power wells.
+        */
        list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) {
+               enum intel_display_power_domain domain;
+
                if (!crtc->base.enabled)
                        continue;
 
-               if (crtc->pipe != PIPE_A || crtc->config.pch_pfit.enabled ||
-                   crtc->config.cpu_transcoder != TRANSCODER_EDP)
-                       enable = true;
+               pipe_domains[crtc->pipe] = get_pipe_power_domains(dev,
+                                               crtc->pipe,
+                                               crtc->config.pch_pfit.enabled);
+
+               for_each_power_domain(domain, pipe_domains[crtc->pipe])
+                       intel_display_power_get(dev, domain);
        }
 
-       intel_set_power_well(dev, enable);
+       list_for_each_entry(crtc, &dev->mode_config.crtc_list, base.head) {
+               enum intel_display_power_domain domain;
+
+               for_each_power_domain(domain, crtc->enabled_power_domains)
+                       intel_display_power_put(dev, domain);
 
+               crtc->enabled_power_domains = pipe_domains[crtc->pipe];
+       }
+
+       intel_display_set_init_power(dev, false);
+}
+
+static void haswell_modeset_global_resources(struct drm_device *dev)
+{
+       modeset_update_power_wells(dev);
        hsw_update_package_c8(dev);
 }
 
@@ -6940,6 +7034,11 @@ static void ironlake_write_eld(struct drm_connector *connector,
                aud_config = IBX_AUD_CFG(pipe);
                aud_cntl_st = IBX_AUD_CNTL_ST(pipe);
                aud_cntrl_st2 = IBX_AUD_CNTL_ST2;
+       } else if (IS_VALLEYVIEW(connector->dev)) {
+               hdmiw_hdmiedid = VLV_HDMIW_HDMIEDID(pipe);
+               aud_config = VLV_AUD_CFG(pipe);
+               aud_cntl_st = VLV_AUD_CNTL_ST(pipe);
+               aud_cntrl_st2 = VLV_AUD_CNTL_ST2;
        } else {
                hdmiw_hdmiedid = CPT_HDMIW_HDMIEDID(pipe);
                aud_config = CPT_AUD_CFG(pipe);
@@ -6949,8 +7048,19 @@ static void ironlake_write_eld(struct drm_connector *connector,
 
        DRM_DEBUG_DRIVER("ELD on pipe %c\n", pipe_name(pipe));
 
-       i = I915_READ(aud_cntl_st);
-       i = (i >> 29) & DIP_PORT_SEL_MASK;              /* DIP_Port_Select, 0x1 = PortB */
+       if (IS_VALLEYVIEW(connector->dev))  {
+               struct intel_encoder *intel_encoder;
+               struct intel_digital_port *intel_dig_port;
+
+               intel_encoder = intel_attached_encoder(connector);
+               intel_dig_port = enc_to_dig_port(&intel_encoder->base);
+               i = intel_dig_port->port;
+       } else {
+               i = I915_READ(aud_cntl_st);
+               i = (i >> 29) & DIP_PORT_SEL_MASK;
+               /* DIP_Port_Select, 0x1 = PortB */
+       }
+
        if (!i) {
                DRM_DEBUG_DRIVER("Audio directed to unknown port\n");
                /* operate blindly on all ports */
@@ -7074,7 +7184,9 @@ static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
                intel_crtc->cursor_visible = visible;
        }
        /* and commit changes on next vblank */
+       POSTING_READ(CURCNTR(pipe));
        I915_WRITE(CURBASE(pipe), base);
+       POSTING_READ(CURBASE(pipe));
 }
 
 static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
@@ -7094,7 +7206,7 @@ static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
                        cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
                        cntl |= CURSOR_MODE_DISABLE;
                }
-               if (IS_HASWELL(dev)) {
+               if (IS_HASWELL(dev) || IS_BROADWELL(dev)) {
                        cntl |= CURSOR_PIPE_CSC_ENABLE;
                        cntl &= ~CURSOR_TRICKLE_FEED_DISABLE;
                }
@@ -7103,7 +7215,9 @@ static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
                intel_crtc->cursor_visible = visible;
        }
        /* and commit changes on next vblank */
+       POSTING_READ(CURCNTR_IVB(pipe));
        I915_WRITE(CURBASE_IVB(pipe), base);
+       POSTING_READ(CURBASE_IVB(pipe));
 }
 
 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
@@ -7150,7 +7264,7 @@ static void intel_crtc_update_cursor(struct drm_crtc *crtc,
        if (!visible && !intel_crtc->cursor_visible)
                return;
 
-       if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
+       if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev) || IS_BROADWELL(dev)) {
                I915_WRITE(CURPOS_IVB(pipe), pos);
                ivb_update_cursor(crtc, base);
        } else {
@@ -7281,8 +7395,8 @@ static int intel_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 {
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 
-       intel_crtc->cursor_x = x;
-       intel_crtc->cursor_y = y;
+       intel_crtc->cursor_x = clamp_t(int, x, SHRT_MIN, SHRT_MAX);
+       intel_crtc->cursor_y = clamp_t(int, y, SHRT_MIN, SHRT_MAX);
 
        if (intel_crtc->active)
                intel_crtc_update_cursor(crtc, intel_crtc->cursor_bo != NULL);
@@ -9809,6 +9923,18 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
        drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
 }
 
+enum pipe intel_get_pipe_from_connector(struct intel_connector *connector)
+{
+       struct drm_encoder *encoder = connector->base.encoder;
+
+       WARN_ON(!mutex_is_locked(&connector->base.dev->mode_config.mutex));
+
+       if (!encoder)
+               return INVALID_PIPE;
+
+       return to_intel_crtc(encoder->crtc)->pipe;
+}
+
 int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
                                struct drm_file *file)
 {
@@ -9824,7 +9950,7 @@ int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
 
        if (!drmmode_obj) {
                DRM_ERROR("no such CRTC id\n");
-               return -EINVAL;
+               return -ENOENT;
        }
 
        crtc = to_intel_crtc(obj_to_crtc(drmmode_obj));
@@ -10260,7 +10386,7 @@ static void intel_init_display(struct drm_device *dev)
                        dev_priv->display.write_eld = ironlake_write_eld;
                        dev_priv->display.modeset_global_resources =
                                ivb_modeset_global_resources;
-               } else if (IS_HASWELL(dev)) {
+               } else if (IS_HASWELL(dev) || IS_GEN8(dev)) {
                        dev_priv->display.fdi_link_train = hsw_fdi_link_train;
                        dev_priv->display.write_eld = haswell_write_eld;
                        dev_priv->display.modeset_global_resources =
@@ -10268,7 +10394,8 @@ static void intel_init_display(struct drm_device *dev)
                }
        } else if (IS_G4X(dev)) {
                dev_priv->display.write_eld = g4x_write_eld;
-       }
+       } else if (IS_VALLEYVIEW(dev))
+               dev_priv->display.write_eld = ironlake_write_eld;
 
        /* Default just returns -ENODEV to indicate unsupported */
        dev_priv->display.queue_flip = intel_default_queue_flip;
@@ -10291,6 +10418,7 @@ static void intel_init_display(struct drm_device *dev)
                dev_priv->display.queue_flip = intel_gen6_queue_flip;
                break;
        case 7:
+       case 8: /* FIXME(BDW): Check that the gen8 RCS flip works. */
                dev_priv->display.queue_flip = intel_gen7_queue_flip;
                break;
        }
@@ -10446,33 +10574,6 @@ static void i915_disable_vga(struct drm_device *dev)
        POSTING_READ(vga_reg);
 }
 
-static void i915_enable_vga_mem(struct drm_device *dev)
-{
-       /* Enable VGA memory on Intel HD */
-       if (HAS_PCH_SPLIT(dev)) {
-               vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
-               outb(inb(VGA_MSR_READ) | VGA_MSR_MEM_EN, VGA_MSR_WRITE);
-               vga_set_legacy_decoding(dev->pdev, VGA_RSRC_LEGACY_IO |
-                                                  VGA_RSRC_LEGACY_MEM |
-                                                  VGA_RSRC_NORMAL_IO |
-                                                  VGA_RSRC_NORMAL_MEM);
-               vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
-       }
-}
-
-void i915_disable_vga_mem(struct drm_device *dev)
-{
-       /* Disable VGA memory on Intel HD */
-       if (HAS_PCH_SPLIT(dev)) {
-               vga_get_uninterruptible(dev->pdev, VGA_RSRC_LEGACY_IO);
-               outb(inb(VGA_MSR_READ) & ~VGA_MSR_MEM_EN, VGA_MSR_WRITE);
-               vga_set_legacy_decoding(dev->pdev, VGA_RSRC_LEGACY_IO |
-                                                  VGA_RSRC_NORMAL_IO |
-                                                  VGA_RSRC_NORMAL_MEM);
-               vga_put(dev->pdev, VGA_RSRC_LEGACY_IO);
-       }
-}
-
 void intel_modeset_init_hw(struct drm_device *dev)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -10758,7 +10859,6 @@ void i915_redisable_vga(struct drm_device *dev)
        if (!(I915_READ(vga_reg) & VGA_DISP_DISABLE)) {
                DRM_DEBUG_KMS("Something enabled VGA plane, disabling it\n");
                i915_disable_vga(dev);
-               i915_disable_vga_mem(dev);
        }
 }
 
@@ -10965,8 +11065,6 @@ void intel_modeset_cleanup(struct drm_device *dev)
 
        intel_disable_fbc(dev);
 
-       i915_enable_vga_mem(dev);
-
        intel_disable_gt_powersave(dev);
 
        ironlake_teardown_rc6(dev);
@@ -11078,7 +11176,7 @@ intel_display_capture_error_state(struct drm_device *dev)
        if (INTEL_INFO(dev)->num_pipes == 0)
                return NULL;
 
-       error = kmalloc(sizeof(*error), GFP_ATOMIC);
+       error = kzalloc(sizeof(*error), GFP_ATOMIC);
        if (error == NULL)
                return NULL;
 
@@ -11086,6 +11184,9 @@ intel_display_capture_error_state(struct drm_device *dev)
                error->power_well_driver = I915_READ(HSW_PWR_WELL_DRIVER);
 
        for_each_pipe(i) {
+               if (!intel_display_power_enabled(dev, POWER_DOMAIN_PIPE(i)))
+                       continue;
+
                if (INTEL_INFO(dev)->gen <= 6 || IS_VALLEYVIEW(dev)) {
                        error->cursor[i].control = I915_READ(CURCNTR(i));
                        error->cursor[i].position = I915_READ(CURPOS(i));
@@ -11119,6 +11220,10 @@ intel_display_capture_error_state(struct drm_device *dev)
        for (i = 0; i < error->num_transcoders; i++) {
                enum transcoder cpu_transcoder = transcoders[i];
 
+               if (!intel_display_power_enabled(dev,
+                               POWER_DOMAIN_TRANSCODER(cpu_transcoder)))
+                       continue;
+
                error->transcoder[i].cpu_transcoder = cpu_transcoder;
 
                error->transcoder[i].conf = I915_READ(PIPECONF(cpu_transcoder));
@@ -11130,12 +11235,6 @@ intel_display_capture_error_state(struct drm_device *dev)
                error->transcoder[i].vsync = I915_READ(VSYNC(cpu_transcoder));
        }
 
-       /* In the code above we read the registers without checking if the power
-        * well was on, so here we have to clear the FPGA_DBG_RM_NOCLAIM bit to
-        * prevent the next I915_WRITE from detecting it and printing an error
-        * message. */
-       intel_uncore_clear_errors(dev);
-
        return error;
 }
 
@@ -11180,7 +11279,7 @@ intel_display_print_error_state(struct drm_i915_error_state_buf *m,
        }
 
        for (i = 0; i < error->num_transcoders; i++) {
-               err_printf(m, "  CPU transcoder: %c\n",
+               err_printf(m, "CPU transcoder: %c\n",
                           transcoder_name(error->transcoder[i].cpu_transcoder));
                err_printf(m, "  CONF: %08x\n", error->transcoder[i].conf);
                err_printf(m, "  HTOTAL: %08x\n", error->transcoder[i].htotal);