Merge branch 'linux-4.7' of git://github.com/skeggsb/linux into drm-fixes
[cascardo/linux.git] / drivers / gpu / drm / i915 / intel_dsi.c
index 01b8e9f..4756ef6 100644 (file)
@@ -46,6 +46,40 @@ static const struct {
        },
 };
 
+/* return pixels in terms of txbyteclkhs */
+static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
+                      u16 burst_mode_ratio)
+{
+       return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
+                                        8 * 100), lane_count);
+}
+
+/* return pixels equvalent to txbyteclkhs */
+static u16 pixels_from_txbyteclkhs(u16 clk_hs, int bpp, int lane_count,
+                       u16 burst_mode_ratio)
+{
+       return DIV_ROUND_UP((clk_hs * lane_count * 8 * 100),
+                                               (bpp * burst_mode_ratio));
+}
+
+enum mipi_dsi_pixel_format pixel_format_from_register_bits(u32 fmt)
+{
+       /* It just so happens the VBT matches register contents. */
+       switch (fmt) {
+       case VID_MODE_FORMAT_RGB888:
+               return MIPI_DSI_FMT_RGB888;
+       case VID_MODE_FORMAT_RGB666:
+               return MIPI_DSI_FMT_RGB666;
+       case VID_MODE_FORMAT_RGB666_PACKED:
+               return MIPI_DSI_FMT_RGB666_PACKED;
+       case VID_MODE_FORMAT_RGB565:
+               return MIPI_DSI_FMT_RGB565;
+       default:
+               MISSING_CASE(fmt);
+               return MIPI_DSI_FMT_RGB666;
+       }
+}
+
 static void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi, enum port port)
 {
        struct drm_encoder *encoder = &intel_dsi->base.base;
@@ -268,22 +302,47 @@ static inline bool is_cmd_mode(struct intel_dsi *intel_dsi)
 static bool intel_dsi_compute_config(struct intel_encoder *encoder,
                                     struct intel_crtc_state *pipe_config)
 {
+       struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
        struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi,
                                                   base);
        struct intel_connector *intel_connector = intel_dsi->attached_connector;
-       struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
+       struct intel_crtc *crtc = to_intel_crtc(pipe_config->base.crtc);
+       const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
        struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
+       int ret;
 
        DRM_DEBUG_KMS("\n");
 
        pipe_config->has_dsi_encoder = true;
 
-       if (fixed_mode)
+       if (fixed_mode) {
                intel_fixed_panel_mode(fixed_mode, adjusted_mode);
 
+               if (HAS_GMCH_DISPLAY(dev_priv))
+                       intel_gmch_panel_fitting(crtc, pipe_config,
+                                                intel_connector->panel.fitting_mode);
+               else
+                       intel_pch_panel_fitting(crtc, pipe_config,
+                                               intel_connector->panel.fitting_mode);
+       }
+
        /* DSI uses short packets for sync events, so clear mode flags for DSI */
        adjusted_mode->flags = 0;
 
+       if (IS_BROXTON(dev_priv)) {
+               /* Dual link goes to DSI transcoder A. */
+               if (intel_dsi->ports == BIT(PORT_C))
+                       pipe_config->cpu_transcoder = TRANSCODER_DSI_C;
+               else
+                       pipe_config->cpu_transcoder = TRANSCODER_DSI_A;
+       }
+
+       ret = intel_compute_dsi_pll(encoder, pipe_config);
+       if (ret)
+               return false;
+
+       pipe_config->clock_set = true;
+
        return true;
 }
 
@@ -403,7 +462,7 @@ static void intel_dsi_port_enable(struct intel_encoder *encoder)
                temp &= ~LANE_CONFIGURATION_MASK;
                temp &= ~DUAL_LINK_MODE_MASK;
 
-               if (intel_dsi->ports == ((1 << PORT_A) | (1 << PORT_C))) {
+               if (intel_dsi->ports == (BIT(PORT_A) | BIT(PORT_C))) {
                        temp |= (intel_dsi->dual_link - 1)
                                                << DUAL_LINK_MODE_SHIFT;
                        temp |= intel_crtc->pipe ?
@@ -471,14 +530,19 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
        struct drm_device *dev = encoder->base.dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
-       struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc);
-       enum pipe pipe = intel_crtc->pipe;
+       struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
        enum port port;
        u32 tmp;
 
        DRM_DEBUG_KMS("\n");
 
-       intel_enable_dsi_pll(encoder);
+       /*
+        * The BIOS may leave the PLL in a wonky state where it doesn't
+        * lock. It needs to be fully powered down to fix it.
+        */
+       intel_disable_dsi_pll(encoder);
+       intel_enable_dsi_pll(encoder, crtc->config);
+
        intel_dsi_prepare(encoder);
 
        /* Panel Enable over CRC PMIC */
@@ -488,19 +552,7 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
        msleep(intel_dsi->panel_on_delay);
 
        if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
-               /*
-                * Disable DPOunit clock gating, can stall pipe
-                * and we need DPLL REFA always enabled
-                */
-               tmp = I915_READ(DPLL(pipe));
-               tmp |= DPLL_REF_CLK_ENABLE_VLV;
-               I915_WRITE(DPLL(pipe), tmp);
-
-               /* update the hw state for DPLL */
-               intel_crtc->config->dpll_hw_state.dpll =
-                               DPLL_INTEGRATED_REF_CLK_VLV |
-                                       DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
-
+               /* Disable DPOunit clock gating, can stall pipe */
                tmp = I915_READ(DSPCLK_GATE_D);
                tmp |= DPOUNIT_CLOCK_GATE_DISABLE;
                I915_WRITE(DSPCLK_GATE_D, tmp);
@@ -652,11 +704,16 @@ static void intel_dsi_post_disable(struct intel_encoder *encoder)
        drm_panel_unprepare(intel_dsi->panel);
 
        msleep(intel_dsi->panel_off_delay);
-       msleep(intel_dsi->panel_pwr_cycle_delay);
 
        /* Panel Disable over CRC PMIC */
        if (intel_dsi->gpio_panel)
                gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0);
+
+       /*
+        * FIXME As we do with eDP, just make a note of the time here
+        * and perform the wait before the next panel power on.
+        */
+       msleep(intel_dsi->panel_pwr_cycle_delay);
 }
 
 static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
@@ -667,7 +724,7 @@ static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
        struct drm_device *dev = encoder->base.dev;
        enum intel_display_power_domain power_domain;
        enum port port;
-       bool ret;
+       bool active = false;
 
        DRM_DEBUG_KMS("\n");
 
@@ -675,55 +732,234 @@ static bool intel_dsi_get_hw_state(struct intel_encoder *encoder,
        if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
                return false;
 
-       ret = false;
+       /*
+        * On Broxton the PLL needs to be enabled with a valid divider
+        * configuration, otherwise accessing DSI registers will hang the
+        * machine. See BSpec North Display Engine registers/MIPI[BXT].
+        */
+       if (IS_BROXTON(dev_priv) && !intel_dsi_pll_is_enabled(dev_priv))
+               goto out_put_power;
 
        /* XXX: this only works for one DSI output */
        for_each_dsi_port(port, intel_dsi->ports) {
                i915_reg_t ctrl_reg = IS_BROXTON(dev) ?
                        BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port);
-               u32 dpi_enabled, func;
+               bool enabled = I915_READ(ctrl_reg) & DPI_ENABLE;
 
-               func = I915_READ(MIPI_DSI_FUNC_PRG(port));
-               dpi_enabled = I915_READ(ctrl_reg) & DPI_ENABLE;
-
-               /* Due to some hardware limitations on BYT, MIPI Port C DPI
-                * Enable bit does not get set. To check whether DSI Port C
-                * was enabled in BIOS, check the Pipe B enable bit
+               /*
+                * Due to some hardware limitations on VLV/CHV, the DPI enable
+                * bit in port C control register does not get set. As a
+                * workaround, check pipe B conf instead.
                 */
-               if (IS_VALLEYVIEW(dev) && port == PORT_C)
-                       dpi_enabled = I915_READ(PIPECONF(PIPE_B)) &
-                                                       PIPECONF_ENABLE;
+               if ((IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) && port == PORT_C)
+                       enabled = I915_READ(PIPECONF(PIPE_B)) & PIPECONF_ENABLE;
+
+               /* Try command mode if video mode not enabled */
+               if (!enabled) {
+                       u32 tmp = I915_READ(MIPI_DSI_FUNC_PRG(port));
+                       enabled = tmp & CMD_MODE_DATA_WIDTH_MASK;
+               }
+
+               if (!enabled)
+                       continue;
+
+               if (!(I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY))
+                       continue;
+
+               if (IS_BROXTON(dev_priv)) {
+                       u32 tmp = I915_READ(MIPI_CTRL(port));
+                       tmp &= BXT_PIPE_SELECT_MASK;
+                       tmp >>= BXT_PIPE_SELECT_SHIFT;
 
-               if (dpi_enabled || (func & CMD_MODE_DATA_WIDTH_MASK)) {
-                       if (I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY) {
-                               *pipe = port == PORT_A ? PIPE_A : PIPE_B;
-                               ret = true;
+                       if (WARN_ON(tmp > PIPE_C))
+                               continue;
 
-                               goto out;
-                       }
+                       *pipe = tmp;
+               } else {
+                       *pipe = port == PORT_A ? PIPE_A : PIPE_B;
                }
+
+               active = true;
+               break;
        }
-out:
+
+out_put_power:
        intel_display_power_put(dev_priv, power_domain);
 
-       return ret;
+       return active;
+}
+
+static void bxt_dsi_get_pipe_config(struct intel_encoder *encoder,
+                                struct intel_crtc_state *pipe_config)
+{
+       struct drm_device *dev = encoder->base.dev;
+       struct drm_i915_private *dev_priv = dev->dev_private;
+       struct drm_display_mode *adjusted_mode =
+                                       &pipe_config->base.adjusted_mode;
+       struct drm_display_mode *adjusted_mode_sw;
+       struct intel_crtc *intel_crtc;
+       struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+       unsigned int lane_count = intel_dsi->lane_count;
+       unsigned int bpp, fmt;
+       enum port port;
+       u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
+       u16 hfp_sw, hsync_sw, hbp_sw;
+       u16 crtc_htotal_sw, crtc_hsync_start_sw, crtc_hsync_end_sw,
+                               crtc_hblank_start_sw, crtc_hblank_end_sw;
+
+       intel_crtc = to_intel_crtc(encoder->base.crtc);
+       adjusted_mode_sw = &intel_crtc->config->base.adjusted_mode;
+
+       /*
+        * Atleast one port is active as encoder->get_config called only if
+        * encoder->get_hw_state() returns true.
+        */
+       for_each_dsi_port(port, intel_dsi->ports) {
+               if (I915_READ(BXT_MIPI_PORT_CTRL(port)) & DPI_ENABLE)
+                       break;
+       }
+
+       fmt = I915_READ(MIPI_DSI_FUNC_PRG(port)) & VID_MODE_FORMAT_MASK;
+       pipe_config->pipe_bpp =
+                       mipi_dsi_pixel_format_to_bpp(
+                               pixel_format_from_register_bits(fmt));
+       bpp = pipe_config->pipe_bpp;
+
+       /* In terms of pixels */
+       adjusted_mode->crtc_hdisplay =
+                               I915_READ(BXT_MIPI_TRANS_HACTIVE(port));
+       adjusted_mode->crtc_vdisplay =
+                               I915_READ(BXT_MIPI_TRANS_VACTIVE(port));
+       adjusted_mode->crtc_vtotal =
+                               I915_READ(BXT_MIPI_TRANS_VTOTAL(port));
+
+       hactive = adjusted_mode->crtc_hdisplay;
+       hfp = I915_READ(MIPI_HFP_COUNT(port));
+
+       /*
+        * Meaningful for video mode non-burst sync pulse mode only,
+        * can be zero for non-burst sync events and burst modes
+        */
+       hsync = I915_READ(MIPI_HSYNC_PADDING_COUNT(port));
+       hbp = I915_READ(MIPI_HBP_COUNT(port));
+
+       /* harizontal values are in terms of high speed byte clock */
+       hfp = pixels_from_txbyteclkhs(hfp, bpp, lane_count,
+                                               intel_dsi->burst_mode_ratio);
+       hsync = pixels_from_txbyteclkhs(hsync, bpp, lane_count,
+                                               intel_dsi->burst_mode_ratio);
+       hbp = pixels_from_txbyteclkhs(hbp, bpp, lane_count,
+                                               intel_dsi->burst_mode_ratio);
+
+       if (intel_dsi->dual_link) {
+               hfp *= 2;
+               hsync *= 2;
+               hbp *= 2;
+       }
+
+       /* vertical values are in terms of lines */
+       vfp = I915_READ(MIPI_VFP_COUNT(port));
+       vsync = I915_READ(MIPI_VSYNC_PADDING_COUNT(port));
+       vbp = I915_READ(MIPI_VBP_COUNT(port));
+
+       adjusted_mode->crtc_htotal = hactive + hfp + hsync + hbp;
+       adjusted_mode->crtc_hsync_start = hfp + adjusted_mode->crtc_hdisplay;
+       adjusted_mode->crtc_hsync_end = hsync + adjusted_mode->crtc_hsync_start;
+       adjusted_mode->crtc_hblank_start = adjusted_mode->crtc_hdisplay;
+       adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_htotal;
+
+       adjusted_mode->crtc_vsync_start = vfp + adjusted_mode->crtc_vdisplay;
+       adjusted_mode->crtc_vsync_end = vsync + adjusted_mode->crtc_vsync_start;
+       adjusted_mode->crtc_vblank_start = adjusted_mode->crtc_vdisplay;
+       adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vtotal;
+
+       /*
+        * In BXT DSI there is no regs programmed with few horizontal timings
+        * in Pixels but txbyteclkhs.. So retrieval process adds some
+        * ROUND_UP ERRORS in the process of PIXELS<==>txbyteclkhs.
+        * Actually here for the given adjusted_mode, we are calculating the
+        * value programmed to the port and then back to the horizontal timing
+        * param in pixels. This is the expected value, including roundup errors
+        * And if that is same as retrieved value from port, then
+        * (HW state) adjusted_mode's horizontal timings are corrected to
+        * match with SW state to nullify the errors.
+        */
+       /* Calculating the value programmed to the Port register */
+       hfp_sw = adjusted_mode_sw->crtc_hsync_start -
+                                       adjusted_mode_sw->crtc_hdisplay;
+       hsync_sw = adjusted_mode_sw->crtc_hsync_end -
+                                       adjusted_mode_sw->crtc_hsync_start;
+       hbp_sw = adjusted_mode_sw->crtc_htotal -
+                                       adjusted_mode_sw->crtc_hsync_end;
+
+       if (intel_dsi->dual_link) {
+               hfp_sw /= 2;
+               hsync_sw /= 2;
+               hbp_sw /= 2;
+       }
+
+       hfp_sw = txbyteclkhs(hfp_sw, bpp, lane_count,
+                                               intel_dsi->burst_mode_ratio);
+       hsync_sw = txbyteclkhs(hsync_sw, bpp, lane_count,
+                           intel_dsi->burst_mode_ratio);
+       hbp_sw = txbyteclkhs(hbp_sw, bpp, lane_count,
+                                               intel_dsi->burst_mode_ratio);
+
+       /* Reverse calculating the adjusted mode parameters from port reg vals*/
+       hfp_sw = pixels_from_txbyteclkhs(hfp_sw, bpp, lane_count,
+                                               intel_dsi->burst_mode_ratio);
+       hsync_sw = pixels_from_txbyteclkhs(hsync_sw, bpp, lane_count,
+                                               intel_dsi->burst_mode_ratio);
+       hbp_sw = pixels_from_txbyteclkhs(hbp_sw, bpp, lane_count,
+                                               intel_dsi->burst_mode_ratio);
+
+       if (intel_dsi->dual_link) {
+               hfp_sw *= 2;
+               hsync_sw *= 2;
+               hbp_sw *= 2;
+       }
+
+       crtc_htotal_sw = adjusted_mode_sw->crtc_hdisplay + hfp_sw +
+                                                       hsync_sw + hbp_sw;
+       crtc_hsync_start_sw = hfp_sw + adjusted_mode_sw->crtc_hdisplay;
+       crtc_hsync_end_sw = hsync_sw + crtc_hsync_start_sw;
+       crtc_hblank_start_sw = adjusted_mode_sw->crtc_hdisplay;
+       crtc_hblank_end_sw = crtc_htotal_sw;
+
+       if (adjusted_mode->crtc_htotal == crtc_htotal_sw)
+               adjusted_mode->crtc_htotal = adjusted_mode_sw->crtc_htotal;
+
+       if (adjusted_mode->crtc_hsync_start == crtc_hsync_start_sw)
+               adjusted_mode->crtc_hsync_start =
+                                       adjusted_mode_sw->crtc_hsync_start;
+
+       if (adjusted_mode->crtc_hsync_end == crtc_hsync_end_sw)
+               adjusted_mode->crtc_hsync_end =
+                                       adjusted_mode_sw->crtc_hsync_end;
+
+       if (adjusted_mode->crtc_hblank_start == crtc_hblank_start_sw)
+               adjusted_mode->crtc_hblank_start =
+                                       adjusted_mode_sw->crtc_hblank_start;
+
+       if (adjusted_mode->crtc_hblank_end == crtc_hblank_end_sw)
+               adjusted_mode->crtc_hblank_end =
+                                       adjusted_mode_sw->crtc_hblank_end;
 }
 
 static void intel_dsi_get_config(struct intel_encoder *encoder,
                                 struct intel_crtc_state *pipe_config)
 {
+       struct drm_device *dev = encoder->base.dev;
        u32 pclk;
        DRM_DEBUG_KMS("\n");
 
        pipe_config->has_dsi_encoder = true;
 
-       /*
-        * DPLL_MD is not used in case of DSI, reading will get some default value
-        * set dpll_md = 0
-        */
-       pipe_config->dpll_hw_state.dpll_md = 0;
+       if (IS_BROXTON(dev))
+               bxt_dsi_get_pipe_config(encoder, pipe_config);
 
-       pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp);
+       pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp,
+                                 pipe_config);
        if (!pclk)
                return;
 
@@ -736,7 +972,7 @@ intel_dsi_mode_valid(struct drm_connector *connector,
                     struct drm_display_mode *mode)
 {
        struct intel_connector *intel_connector = to_intel_connector(connector);
-       struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
+       const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
        int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 
        DRM_DEBUG_KMS("\n");
@@ -772,14 +1008,6 @@ static u16 txclkesc(u32 divider, unsigned int us)
        }
 }
 
-/* return pixels in terms of txbyteclkhs */
-static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count,
-                      u16 burst_mode_ratio)
-{
-       return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio,
-                                        8 * 100), lane_count);
-}
-
 static void set_dsi_timings(struct drm_encoder *encoder,
                            const struct drm_display_mode *adjusted_mode)
 {
@@ -787,7 +1015,7 @@ static void set_dsi_timings(struct drm_encoder *encoder,
        struct drm_i915_private *dev_priv = dev->dev_private;
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
        enum port port;
-       unsigned int bpp = dsi_pixel_format_bpp(intel_dsi->pixel_format);
+       unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
        unsigned int lane_count = intel_dsi->lane_count;
 
        u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp;
@@ -849,6 +1077,23 @@ static void set_dsi_timings(struct drm_encoder *encoder,
        }
 }
 
+static u32 pixel_format_to_reg(enum mipi_dsi_pixel_format fmt)
+{
+       switch (fmt) {
+       case MIPI_DSI_FMT_RGB888:
+               return VID_MODE_FORMAT_RGB888;
+       case MIPI_DSI_FMT_RGB666:
+               return VID_MODE_FORMAT_RGB666;
+       case MIPI_DSI_FMT_RGB666_PACKED:
+               return VID_MODE_FORMAT_RGB666_PACKED;
+       case MIPI_DSI_FMT_RGB565:
+               return VID_MODE_FORMAT_RGB565;
+       default:
+               MISSING_CASE(fmt);
+               return VID_MODE_FORMAT_RGB666;
+       }
+}
+
 static void intel_dsi_prepare(struct intel_encoder *intel_encoder)
 {
        struct drm_encoder *encoder = &intel_encoder->base;
@@ -858,7 +1103,7 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder)
        struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
        const struct drm_display_mode *adjusted_mode = &intel_crtc->config->base.adjusted_mode;
        enum port port;
-       unsigned int bpp = dsi_pixel_format_bpp(intel_dsi->pixel_format);
+       unsigned int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
        u32 val, tmp;
        u16 mode_hdisplay;
 
@@ -917,9 +1162,7 @@ static void intel_dsi_prepare(struct intel_encoder *intel_encoder)
                val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */
        } else {
                val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT;
-
-               /* XXX: cross-check bpp vs. pixel format? */
-               val |= intel_dsi->pixel_format;
+               val |= pixel_format_to_reg(intel_dsi->pixel_format);
        }
 
        tmp = 0;
@@ -1059,6 +1302,48 @@ static int intel_dsi_get_modes(struct drm_connector *connector)
        return 1;
 }
 
+static int intel_dsi_set_property(struct drm_connector *connector,
+                                 struct drm_property *property,
+                                 uint64_t val)
+{
+       struct drm_device *dev = connector->dev;
+       struct intel_connector *intel_connector = to_intel_connector(connector);
+       struct drm_crtc *crtc;
+       int ret;
+
+       ret = drm_object_property_set_value(&connector->base, property, val);
+       if (ret)
+               return ret;
+
+       if (property == dev->mode_config.scaling_mode_property) {
+               if (val == DRM_MODE_SCALE_NONE) {
+                       DRM_DEBUG_KMS("no scaling not supported\n");
+                       return -EINVAL;
+               }
+               if (HAS_GMCH_DISPLAY(dev) &&
+                   val == DRM_MODE_SCALE_CENTER) {
+                       DRM_DEBUG_KMS("centering not supported\n");
+                       return -EINVAL;
+               }
+
+               if (intel_connector->panel.fitting_mode == val)
+                       return 0;
+
+               intel_connector->panel.fitting_mode = val;
+       }
+
+       crtc = intel_attached_encoder(connector)->base.crtc;
+       if (crtc && crtc->state->enable) {
+               /*
+                * If the CRTC is enabled, the display will be changed
+                * according to the new panel fitting mode.
+                */
+               intel_crtc_restore_mode(crtc);
+       }
+
+       return 0;
+}
+
 static void intel_dsi_connector_destroy(struct drm_connector *connector)
 {
        struct intel_connector *intel_connector = to_intel_connector(connector);
@@ -1101,11 +1386,25 @@ static const struct drm_connector_funcs intel_dsi_connector_funcs = {
        .detect = intel_dsi_detect,
        .destroy = intel_dsi_connector_destroy,
        .fill_modes = drm_helper_probe_single_connector_modes,
+       .set_property = intel_dsi_set_property,
        .atomic_get_property = intel_connector_atomic_get_property,
        .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
        .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
 };
 
+static void intel_dsi_add_properties(struct intel_connector *connector)
+{
+       struct drm_device *dev = connector->base.dev;
+
+       if (connector->panel.fixed_mode) {
+               drm_mode_create_scaling_mode_property(dev);
+               drm_object_attach_property(&connector->base.base,
+                                          dev->mode_config.scaling_mode_property,
+                                          DRM_MODE_SCALE_ASPECT);
+               connector->panel.fitting_mode = DRM_MODE_SCALE_ASPECT;
+       }
+}
+
 void intel_dsi_init(struct drm_device *dev)
 {
        struct intel_dsi *intel_dsi;
@@ -1121,11 +1420,13 @@ void intel_dsi_init(struct drm_device *dev)
        DRM_DEBUG_KMS("\n");
 
        /* There is no detection method for MIPI so rely on VBT */
-       if (!dev_priv->vbt.has_mipi)
+       if (!intel_bios_is_dsi_present(dev_priv, &port))
                return;
 
        if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
                dev_priv->mipi_mmio_base = VLV_MIPI_BASE;
+       } else if (IS_BROXTON(dev)) {
+               dev_priv->mipi_mmio_base = BXT_MIPI_BASE;
        } else {
                DRM_ERROR("Unsupported Mipi device to reg base");
                return;
@@ -1161,17 +1462,21 @@ void intel_dsi_init(struct drm_device *dev)
        intel_connector->get_hw_state = intel_connector_get_hw_state;
        intel_connector->unregister = intel_connector_unregister;
 
-       /* Pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI port C */
-       if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIA) {
-               intel_encoder->crtc_mask = (1 << PIPE_A);
-               intel_dsi->ports = (1 << PORT_A);
-       } else if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIC) {
-               intel_encoder->crtc_mask = (1 << PIPE_B);
-               intel_dsi->ports = (1 << PORT_C);
-       }
+       /*
+        * On BYT/CHV, pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI
+        * port C. BXT isn't limited like this.
+        */
+       if (IS_BROXTON(dev_priv))
+               intel_encoder->crtc_mask = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C);
+       else if (port == PORT_A)
+               intel_encoder->crtc_mask = BIT(PIPE_A);
+       else
+               intel_encoder->crtc_mask = BIT(PIPE_B);
 
        if (dev_priv->vbt.dsi.config->dual_link)
-               intel_dsi->ports = ((1 << PORT_A) | (1 << PORT_C));
+               intel_dsi->ports = BIT(PORT_A) | BIT(PORT_C);
+       else
+               intel_dsi->ports = BIT(port);
 
        /* Create a DSI host (and a device) for each port. */
        for_each_dsi_port(port, intel_dsi->ports) {
@@ -1223,8 +1528,6 @@ void intel_dsi_init(struct drm_device *dev)
 
        intel_connector_attach_encoder(intel_connector, intel_encoder);
 
-       drm_connector_register(connector);
-
        drm_panel_attach(intel_dsi->panel, connector);
 
        mutex_lock(&dev->mode_config.mutex);
@@ -1242,7 +1545,15 @@ void intel_dsi_init(struct drm_device *dev)
                goto err;
        }
 
+       connector->display_info.width_mm = fixed_mode->width_mm;
+       connector->display_info.height_mm = fixed_mode->height_mm;
+
        intel_panel_init(&intel_connector->panel, fixed_mode, NULL);
+
+       intel_dsi_add_properties(intel_connector);
+
+       drm_connector_register(connector);
+
        intel_panel_setup_backlight(connector, INVALID_PIPE);
 
        return;