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  1. /*
  2.  * Copyright 2006 Dave Airlie <airlied@linux.ie>
  3.  * Copyright © 2006-2007 Intel Corporation
  4.  *
  5.  * Permission is hereby granted, free of charge, to any person obtaining a
  6.  * copy of this software and associated documentation files (the "Software"),
  7.  * to deal in the Software without restriction, including without limitation
  8.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  9.  * and/or sell copies of the Software, and to permit persons to whom the
  10.  * Software is furnished to do so, subject to the following conditions:
  11.  *
  12.  * The above copyright notice and this permission notice (including the next
  13.  * paragraph) shall be included in all copies or substantial portions of the
  14.  * Software.
  15.  *
  16.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21.  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22.  * DEALINGS IN THE SOFTWARE.
  23.  *
  24.  * Authors:
  25.  *      Eric Anholt <eric@anholt.net>
  26.  */
  27. #include <linux/i2c.h>
  28. #include <linux/slab.h>
  29. #include <drm/drmP.h>
  30. #include <drm/drm_crtc.h>
  31. #include "intel_drv.h"
  32. #include <drm/i915_drm.h>
  33. #include "i915_drv.h"
  34. #include "dvo.h"
  35.  
  36. #define SIL164_ADDR     0x38
  37. #define CH7xxx_ADDR     0x76
  38. #define TFP410_ADDR     0x38
  39. #define NS2501_ADDR     0x38
  40.  
  41. static const struct intel_dvo_device intel_dvo_devices[] = {
  42.         {
  43.                 .type = INTEL_DVO_CHIP_TMDS,
  44.                 .name = "sil164",
  45.                 .dvo_reg = DVOC,
  46.                 .slave_addr = SIL164_ADDR,
  47.                 .dev_ops = &sil164_ops,
  48.         },
  49.         {
  50.                 .type = INTEL_DVO_CHIP_TMDS,
  51.                 .name = "ch7xxx",
  52.                 .dvo_reg = DVOC,
  53.                 .slave_addr = CH7xxx_ADDR,
  54.                 .dev_ops = &ch7xxx_ops,
  55.         },
  56.         {
  57.                 .type = INTEL_DVO_CHIP_TMDS,
  58.                 .name = "ch7xxx",
  59.                 .dvo_reg = DVOC,
  60.                 .slave_addr = 0x75, /* For some ch7010 */
  61.                 .dev_ops = &ch7xxx_ops,
  62.         },
  63.         {
  64.                 .type = INTEL_DVO_CHIP_LVDS,
  65.                 .name = "ivch",
  66.                 .dvo_reg = DVOA,
  67.                 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
  68.                 .dev_ops = &ivch_ops,
  69.         },
  70.         {
  71.                 .type = INTEL_DVO_CHIP_TMDS,
  72.                 .name = "tfp410",
  73.                 .dvo_reg = DVOC,
  74.                 .slave_addr = TFP410_ADDR,
  75.                 .dev_ops = &tfp410_ops,
  76.         },
  77.         {
  78.                 .type = INTEL_DVO_CHIP_LVDS,
  79.                 .name = "ch7017",
  80.                 .dvo_reg = DVOC,
  81.                 .slave_addr = 0x75,
  82.                 .gpio = GMBUS_PORT_DPB,
  83.                 .dev_ops = &ch7017_ops,
  84.         },
  85.         {
  86.                 .type = INTEL_DVO_CHIP_TMDS,
  87.                 .name = "ns2501",
  88.                 .dvo_reg = DVOC,
  89.                 .slave_addr = NS2501_ADDR,
  90.                 .dev_ops = &ns2501_ops,
  91.         }
  92. };
  93.  
  94. struct intel_dvo {
  95.         struct intel_encoder base;
  96.  
  97.         struct intel_dvo_device dev;
  98.  
  99.         struct drm_display_mode *panel_fixed_mode;
  100.         bool panel_wants_dither;
  101. };
  102.  
  103. static struct intel_dvo *enc_to_dvo(struct intel_encoder *encoder)
  104. {
  105.         return container_of(encoder, struct intel_dvo, base);
  106. }
  107.  
  108. static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
  109. {
  110.         return enc_to_dvo(intel_attached_encoder(connector));
  111. }
  112.  
  113. static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
  114. {
  115.         struct drm_device *dev = connector->base.dev;
  116.         struct drm_i915_private *dev_priv = dev->dev_private;
  117.         struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base);
  118.         u32 tmp;
  119.  
  120.         tmp = I915_READ(intel_dvo->dev.dvo_reg);
  121.  
  122.         if (!(tmp & DVO_ENABLE))
  123.                 return false;
  124.  
  125.         return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
  126. }
  127.  
  128. static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
  129.                                    enum pipe *pipe)
  130. {
  131.         struct drm_device *dev = encoder->base.dev;
  132.         struct drm_i915_private *dev_priv = dev->dev_private;
  133.         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
  134.         u32 tmp;
  135.  
  136.         tmp = I915_READ(intel_dvo->dev.dvo_reg);
  137.  
  138.         if (!(tmp & DVO_ENABLE))
  139.                 return false;
  140.  
  141.         *pipe = PORT_TO_PIPE(tmp);
  142.  
  143.         return true;
  144. }
  145.  
  146. static void intel_dvo_get_config(struct intel_encoder *encoder,
  147.                                  struct intel_crtc_config *pipe_config)
  148. {
  149.         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
  150.         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
  151.         u32 tmp, flags = 0;
  152.  
  153.         tmp = I915_READ(intel_dvo->dev.dvo_reg);
  154.         if (tmp & DVO_HSYNC_ACTIVE_HIGH)
  155.                 flags |= DRM_MODE_FLAG_PHSYNC;
  156.         else
  157.                 flags |= DRM_MODE_FLAG_NHSYNC;
  158.         if (tmp & DVO_VSYNC_ACTIVE_HIGH)
  159.                 flags |= DRM_MODE_FLAG_PVSYNC;
  160.         else
  161.                 flags |= DRM_MODE_FLAG_NVSYNC;
  162.  
  163.         pipe_config->adjusted_mode.flags |= flags;
  164.  
  165.         pipe_config->adjusted_mode.crtc_clock = pipe_config->port_clock;
  166. }
  167.  
  168. static void intel_disable_dvo(struct intel_encoder *encoder)
  169. {
  170.         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
  171.         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
  172.         u32 dvo_reg = intel_dvo->dev.dvo_reg;
  173.         u32 temp = I915_READ(dvo_reg);
  174.  
  175.         intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
  176.         I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
  177.         I915_READ(dvo_reg);
  178. }
  179.  
  180. static void intel_enable_dvo(struct intel_encoder *encoder)
  181. {
  182.         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
  183.         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
  184.         struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
  185.         u32 dvo_reg = intel_dvo->dev.dvo_reg;
  186.         u32 temp = I915_READ(dvo_reg);
  187.  
  188.                 I915_WRITE(dvo_reg, temp | DVO_ENABLE);
  189.                 I915_READ(dvo_reg);
  190.         intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev,
  191.                                          &crtc->config.requested_mode,
  192.                                          &crtc->config.adjusted_mode);
  193.  
  194.         intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
  195. }
  196.  
  197. /* Special dpms function to support cloning between dvo/sdvo/crt. */
  198. static void intel_dvo_dpms(struct drm_connector *connector, int mode)
  199. {
  200.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  201.         struct drm_crtc *crtc;
  202.         struct intel_crtc_config *config;
  203.  
  204.         /* dvo supports only 2 dpms states. */
  205.         if (mode != DRM_MODE_DPMS_ON)
  206.                 mode = DRM_MODE_DPMS_OFF;
  207.  
  208.         if (mode == connector->dpms)
  209.                 return;
  210.  
  211.         connector->dpms = mode;
  212.  
  213.         /* Only need to change hw state when actually enabled */
  214.         crtc = intel_dvo->base.base.crtc;
  215.         if (!crtc) {
  216.                 intel_dvo->base.connectors_active = false;
  217.                 return;
  218.         }
  219.  
  220.         /* We call connector dpms manually below in case pipe dpms doesn't
  221.          * change due to cloning. */
  222.         if (mode == DRM_MODE_DPMS_ON) {
  223.                 config = &to_intel_crtc(crtc)->config;
  224.  
  225.                 intel_dvo->base.connectors_active = true;
  226.  
  227.                 intel_crtc_update_dpms(crtc);
  228.  
  229.                 intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev,
  230.                                                  &config->requested_mode,
  231.                                                  &config->adjusted_mode);
  232.  
  233.                 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
  234.         } else {
  235.                 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
  236.  
  237.                 intel_dvo->base.connectors_active = false;
  238.  
  239.                 intel_crtc_update_dpms(crtc);
  240.         }
  241.  
  242.         intel_modeset_check_state(connector->dev);
  243. }
  244.  
  245. static enum drm_mode_status
  246. intel_dvo_mode_valid(struct drm_connector *connector,
  247.                                 struct drm_display_mode *mode)
  248. {
  249.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  250.  
  251.         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
  252.                 return MODE_NO_DBLESCAN;
  253.  
  254.         /* XXX: Validate clock range */
  255.  
  256.         if (intel_dvo->panel_fixed_mode) {
  257.                 if (mode->hdisplay > intel_dvo->panel_fixed_mode->hdisplay)
  258.                         return MODE_PANEL;
  259.                 if (mode->vdisplay > intel_dvo->panel_fixed_mode->vdisplay)
  260.                         return MODE_PANEL;
  261.         }
  262.  
  263.         return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
  264. }
  265.  
  266. static bool intel_dvo_compute_config(struct intel_encoder *encoder,
  267.                                      struct intel_crtc_config *pipe_config)
  268. {
  269.         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
  270.         struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
  271.  
  272.         /* If we have timings from the BIOS for the panel, put them in
  273.          * to the adjusted mode.  The CRTC will be set up for this mode,
  274.          * with the panel scaling set up to source from the H/VDisplay
  275.          * of the original mode.
  276.          */
  277.         if (intel_dvo->panel_fixed_mode != NULL) {
  278. #define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
  279.                 C(hdisplay);
  280.                 C(hsync_start);
  281.                 C(hsync_end);
  282.                 C(htotal);
  283.                 C(vdisplay);
  284.                 C(vsync_start);
  285.                 C(vsync_end);
  286.                 C(vtotal);
  287.                 C(clock);
  288. #undef C
  289.  
  290.                 drm_mode_set_crtcinfo(adjusted_mode, 0);
  291.         }
  292.  
  293.         return true;
  294. }
  295.  
  296. static void intel_dvo_pre_enable(struct intel_encoder *encoder)
  297. {
  298.         struct drm_device *dev = encoder->base.dev;
  299.         struct drm_i915_private *dev_priv = dev->dev_private;
  300.         struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
  301.         struct drm_display_mode *adjusted_mode = &crtc->config.adjusted_mode;
  302.         struct intel_dvo *intel_dvo = enc_to_dvo(encoder);
  303.         int pipe = crtc->pipe;
  304.         u32 dvo_val;
  305.         u32 dvo_reg = intel_dvo->dev.dvo_reg, dvo_srcdim_reg;
  306.  
  307.         switch (dvo_reg) {
  308.         case DVOA:
  309.         default:
  310.                 dvo_srcdim_reg = DVOA_SRCDIM;
  311.                 break;
  312.         case DVOB:
  313.                 dvo_srcdim_reg = DVOB_SRCDIM;
  314.                 break;
  315.         case DVOC:
  316.                 dvo_srcdim_reg = DVOC_SRCDIM;
  317.                 break;
  318.         }
  319.  
  320.         /* Save the data order, since I don't know what it should be set to. */
  321.         dvo_val = I915_READ(dvo_reg) &
  322.                   (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
  323.         dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
  324.                    DVO_BLANK_ACTIVE_HIGH;
  325.  
  326.         if (pipe == 1)
  327.                 dvo_val |= DVO_PIPE_B_SELECT;
  328.         dvo_val |= DVO_PIPE_STALL;
  329.         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
  330.                 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
  331.         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
  332.                 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
  333.  
  334.         /*I915_WRITE(DVOB_SRCDIM,
  335.           (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
  336.           (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
  337.         I915_WRITE(dvo_srcdim_reg,
  338.                    (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
  339.                    (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
  340.         /*I915_WRITE(DVOB, dvo_val);*/
  341.         I915_WRITE(dvo_reg, dvo_val);
  342. }
  343.  
  344. /**
  345.  * Detect the output connection on our DVO device.
  346.  *
  347.  * Unimplemented.
  348.  */
  349. static enum drm_connector_status
  350. intel_dvo_detect(struct drm_connector *connector, bool force)
  351. {
  352.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  353.         DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n",
  354.                       connector->base.id, connector->name);
  355.         return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
  356. }
  357.  
  358. static int intel_dvo_get_modes(struct drm_connector *connector)
  359. {
  360.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  361.         struct drm_i915_private *dev_priv = connector->dev->dev_private;
  362.  
  363.         /* We should probably have an i2c driver get_modes function for those
  364.          * devices which will have a fixed set of modes determined by the chip
  365.          * (TV-out, for example), but for now with just TMDS and LVDS,
  366.          * that's not the case.
  367.          */
  368.         intel_ddc_get_modes(connector,
  369.                             intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPC));
  370.         if (!list_empty(&connector->probed_modes))
  371.                 return 1;
  372.  
  373.         if (intel_dvo->panel_fixed_mode != NULL) {
  374.                 struct drm_display_mode *mode;
  375.                 mode = drm_mode_duplicate(connector->dev, intel_dvo->panel_fixed_mode);
  376.                 if (mode) {
  377.                         drm_mode_probed_add(connector, mode);
  378.                         return 1;
  379.                 }
  380.         }
  381.  
  382.         return 0;
  383. }
  384.  
  385. static void intel_dvo_destroy(struct drm_connector *connector)
  386. {
  387.         drm_connector_cleanup(connector);
  388.         kfree(connector);
  389. }
  390.  
  391. static const struct drm_connector_funcs intel_dvo_connector_funcs = {
  392.         .dpms = intel_dvo_dpms,
  393.         .detect = intel_dvo_detect,
  394.         .destroy = intel_dvo_destroy,
  395.         .fill_modes = drm_helper_probe_single_connector_modes,
  396. };
  397.  
  398. static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
  399.         .mode_valid = intel_dvo_mode_valid,
  400.         .get_modes = intel_dvo_get_modes,
  401.         .best_encoder = intel_best_encoder,
  402. };
  403.  
  404. static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
  405. {
  406.         struct intel_dvo *intel_dvo = enc_to_dvo(to_intel_encoder(encoder));
  407.  
  408.         if (intel_dvo->dev.dev_ops->destroy)
  409.                 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
  410.  
  411.         kfree(intel_dvo->panel_fixed_mode);
  412.  
  413.         intel_encoder_destroy(encoder);
  414. }
  415.  
  416. static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
  417.         .destroy = intel_dvo_enc_destroy,
  418. };
  419.  
  420. /**
  421.  * Attempts to get a fixed panel timing for LVDS (currently only the i830).
  422.  *
  423.  * Other chips with DVO LVDS will need to extend this to deal with the LVDS
  424.  * chip being on DVOB/C and having multiple pipes.
  425.  */
  426. static struct drm_display_mode *
  427. intel_dvo_get_current_mode(struct drm_connector *connector)
  428. {
  429.         struct drm_device *dev = connector->dev;
  430.         struct drm_i915_private *dev_priv = dev->dev_private;
  431.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  432.         uint32_t dvo_val = I915_READ(intel_dvo->dev.dvo_reg);
  433.         struct drm_display_mode *mode = NULL;
  434.  
  435.         /* If the DVO port is active, that'll be the LVDS, so we can pull out
  436.          * its timings to get how the BIOS set up the panel.
  437.          */
  438.         if (dvo_val & DVO_ENABLE) {
  439.                 struct drm_crtc *crtc;
  440.                 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
  441.  
  442.                 crtc = intel_get_crtc_for_pipe(dev, pipe);
  443.                 if (crtc) {
  444.                         mode = intel_crtc_mode_get(dev, crtc);
  445.                         if (mode) {
  446.                                 mode->type |= DRM_MODE_TYPE_PREFERRED;
  447.                                 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
  448.                                         mode->flags |= DRM_MODE_FLAG_PHSYNC;
  449.                                 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
  450.                                         mode->flags |= DRM_MODE_FLAG_PVSYNC;
  451.                         }
  452.                 }
  453.         }
  454.  
  455.         return mode;
  456. }
  457.  
  458. void intel_dvo_init(struct drm_device *dev)
  459. {
  460.         struct drm_i915_private *dev_priv = dev->dev_private;
  461.         struct intel_encoder *intel_encoder;
  462.         struct intel_dvo *intel_dvo;
  463.         struct intel_connector *intel_connector;
  464.         int i;
  465.         int encoder_type = DRM_MODE_ENCODER_NONE;
  466.  
  467.         intel_dvo = kzalloc(sizeof(*intel_dvo), GFP_KERNEL);
  468.         if (!intel_dvo)
  469.                 return;
  470.  
  471.         intel_connector = kzalloc(sizeof(*intel_connector), GFP_KERNEL);
  472.         if (!intel_connector) {
  473.                 kfree(intel_dvo);
  474.                 return;
  475.         }
  476.  
  477.         intel_encoder = &intel_dvo->base;
  478.         drm_encoder_init(dev, &intel_encoder->base,
  479.                          &intel_dvo_enc_funcs, encoder_type);
  480.  
  481.         intel_encoder->disable = intel_disable_dvo;
  482.         intel_encoder->enable = intel_enable_dvo;
  483.         intel_encoder->get_hw_state = intel_dvo_get_hw_state;
  484.         intel_encoder->get_config = intel_dvo_get_config;
  485.         intel_encoder->compute_config = intel_dvo_compute_config;
  486.         intel_encoder->pre_enable = intel_dvo_pre_enable;
  487.         intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
  488.         intel_connector->unregister = intel_connector_unregister;
  489.  
  490.         /* Now, try to find a controller */
  491.         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
  492.                 struct drm_connector *connector = &intel_connector->base;
  493.                 const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
  494.                 struct i2c_adapter *i2c;
  495.                 int gpio;
  496.                 bool dvoinit;
  497.  
  498.                 /* Allow the I2C driver info to specify the GPIO to be used in
  499.                  * special cases, but otherwise default to what's defined
  500.                  * in the spec.
  501.                  */
  502.                 if (intel_gmbus_is_port_valid(dvo->gpio))
  503.                         gpio = dvo->gpio;
  504.                 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
  505.                         gpio = GMBUS_PORT_SSC;
  506.                 else
  507.                         gpio = GMBUS_PORT_DPB;
  508.  
  509.                 /* Set up the I2C bus necessary for the chip we're probing.
  510.                  * It appears that everything is on GPIOE except for panels
  511.                  * on i830 laptops, which are on GPIOB (DVOA).
  512.                  */
  513.                 i2c = intel_gmbus_get_adapter(dev_priv, gpio);
  514.  
  515.                 intel_dvo->dev = *dvo;
  516.  
  517.                 /* GMBUS NAK handling seems to be unstable, hence let the
  518.                  * transmitter detection run in bit banging mode for now.
  519.                  */
  520.                 intel_gmbus_force_bit(i2c, true);
  521.  
  522.                 dvoinit = dvo->dev_ops->init(&intel_dvo->dev, i2c);
  523.  
  524.                 intel_gmbus_force_bit(i2c, false);
  525.  
  526.                 if (!dvoinit)
  527.                         continue;
  528.  
  529.                 intel_encoder->type = INTEL_OUTPUT_DVO;
  530.                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
  531.                 switch (dvo->type) {
  532.                 case INTEL_DVO_CHIP_TMDS:
  533.                         intel_encoder->cloneable = (1 << INTEL_OUTPUT_ANALOG) |
  534.                                 (1 << INTEL_OUTPUT_DVO);
  535.                         drm_connector_init(dev, connector,
  536.                                            &intel_dvo_connector_funcs,
  537.                                            DRM_MODE_CONNECTOR_DVII);
  538.                         encoder_type = DRM_MODE_ENCODER_TMDS;
  539.                         break;
  540.                 case INTEL_DVO_CHIP_LVDS:
  541.                         intel_encoder->cloneable = 0;
  542.                         drm_connector_init(dev, connector,
  543.                                            &intel_dvo_connector_funcs,
  544.                                            DRM_MODE_CONNECTOR_LVDS);
  545.                         encoder_type = DRM_MODE_ENCODER_LVDS;
  546.                         break;
  547.                 }
  548.  
  549.                 drm_connector_helper_add(connector,
  550.                                          &intel_dvo_connector_helper_funcs);
  551.                 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
  552.                 connector->interlace_allowed = false;
  553.                 connector->doublescan_allowed = false;
  554.  
  555.                 intel_connector_attach_encoder(intel_connector, intel_encoder);
  556.                 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
  557.                         /* For our LVDS chipsets, we should hopefully be able
  558.                          * to dig the fixed panel mode out of the BIOS data.
  559.                          * However, it's in a different format from the BIOS
  560.                          * data on chipsets with integrated LVDS (stored in AIM
  561.                          * headers, likely), so for now, just get the current
  562.                          * mode being output through DVO.
  563.                          */
  564.                         intel_dvo->panel_fixed_mode =
  565.                                 intel_dvo_get_current_mode(connector);
  566.                         intel_dvo->panel_wants_dither = true;
  567.                 }
  568.  
  569.                 drm_connector_register(connector);
  570.                 return;
  571.         }
  572.  
  573.         drm_encoder_cleanup(&intel_encoder->base);
  574.         kfree(intel_dvo);
  575.         kfree(intel_connector);
  576. }
  577.