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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_LVDS,
  58.                 .name = "ivch",
  59.                 .dvo_reg = DVOA,
  60.                 .slave_addr = 0x02, /* Might also be 0x44, 0x84, 0xc4 */
  61.                 .dev_ops = &ivch_ops,
  62.         },
  63.         {
  64.                 .type = INTEL_DVO_CHIP_TMDS,
  65.                 .name = "tfp410",
  66.                 .dvo_reg = DVOC,
  67.                 .slave_addr = TFP410_ADDR,
  68.                 .dev_ops = &tfp410_ops,
  69.         },
  70.         {
  71.                 .type = INTEL_DVO_CHIP_LVDS,
  72.                 .name = "ch7017",
  73.                 .dvo_reg = DVOC,
  74.                 .slave_addr = 0x75,
  75.                 .gpio = GMBUS_PORT_DPB,
  76.                 .dev_ops = &ch7017_ops,
  77.         },
  78.         {
  79.                 .type = INTEL_DVO_CHIP_TMDS,
  80.                 .name = "ns2501",
  81.                 .dvo_reg = DVOC,
  82.                 .slave_addr = NS2501_ADDR,
  83.                 .dev_ops = &ns2501_ops,
  84.         }
  85. };
  86.  
  87. struct intel_dvo {
  88.         struct intel_encoder base;
  89.  
  90.         struct intel_dvo_device dev;
  91.  
  92.         struct drm_display_mode *panel_fixed_mode;
  93.         bool panel_wants_dither;
  94. };
  95.  
  96. static struct intel_dvo *enc_to_intel_dvo(struct drm_encoder *encoder)
  97. {
  98.         return container_of(encoder, struct intel_dvo, base.base);
  99. }
  100.  
  101. static struct intel_dvo *intel_attached_dvo(struct drm_connector *connector)
  102. {
  103.         return container_of(intel_attached_encoder(connector),
  104.                             struct intel_dvo, base);
  105. }
  106.  
  107. static bool intel_dvo_connector_get_hw_state(struct intel_connector *connector)
  108. {
  109.         struct intel_dvo *intel_dvo = intel_attached_dvo(&connector->base);
  110.  
  111.         return intel_dvo->dev.dev_ops->get_hw_state(&intel_dvo->dev);
  112. }
  113.  
  114. static bool intel_dvo_get_hw_state(struct intel_encoder *encoder,
  115.                                    enum pipe *pipe)
  116. {
  117.         struct drm_device *dev = encoder->base.dev;
  118.         struct drm_i915_private *dev_priv = dev->dev_private;
  119.         struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
  120.         u32 tmp;
  121.  
  122.         tmp = I915_READ(intel_dvo->dev.dvo_reg);
  123.  
  124.         if (!(tmp & DVO_ENABLE))
  125.                 return false;
  126.  
  127.         *pipe = PORT_TO_PIPE(tmp);
  128.  
  129.         return true;
  130. }
  131.  
  132. static void intel_disable_dvo(struct intel_encoder *encoder)
  133. {
  134.         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
  135.         struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
  136.         u32 dvo_reg = intel_dvo->dev.dvo_reg;
  137.         u32 temp = I915_READ(dvo_reg);
  138.  
  139.         intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
  140.         I915_WRITE(dvo_reg, temp & ~DVO_ENABLE);
  141.         I915_READ(dvo_reg);
  142. }
  143.  
  144. static void intel_enable_dvo(struct intel_encoder *encoder)
  145. {
  146.         struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
  147.         struct intel_dvo *intel_dvo = enc_to_intel_dvo(&encoder->base);
  148.         u32 dvo_reg = intel_dvo->dev.dvo_reg;
  149.         u32 temp = I915_READ(dvo_reg);
  150.  
  151.                 I915_WRITE(dvo_reg, temp | DVO_ENABLE);
  152.                 I915_READ(dvo_reg);
  153.         intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
  154. }
  155.  
  156. static void intel_dvo_dpms(struct drm_connector *connector, int mode)
  157. {
  158.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  159.         struct drm_crtc *crtc;
  160.  
  161.         /* dvo supports only 2 dpms states. */
  162.         if (mode != DRM_MODE_DPMS_ON)
  163.                 mode = DRM_MODE_DPMS_OFF;
  164.  
  165.         if (mode == connector->dpms)
  166.                 return;
  167.  
  168.         connector->dpms = mode;
  169.  
  170.         /* Only need to change hw state when actually enabled */
  171.         crtc = intel_dvo->base.base.crtc;
  172.         if (!crtc) {
  173.                 intel_dvo->base.connectors_active = false;
  174.                 return;
  175.         }
  176.  
  177.         if (mode == DRM_MODE_DPMS_ON) {
  178.                 intel_dvo->base.connectors_active = true;
  179.  
  180.                 intel_crtc_update_dpms(crtc);
  181.  
  182.                 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, true);
  183.         } else {
  184.                 intel_dvo->dev.dev_ops->dpms(&intel_dvo->dev, false);
  185.  
  186.                 intel_dvo->base.connectors_active = false;
  187.  
  188.                 intel_crtc_update_dpms(crtc);
  189.         }
  190.  
  191.         intel_modeset_check_state(connector->dev);
  192. }
  193.  
  194. static int intel_dvo_mode_valid(struct drm_connector *connector,
  195.                                 struct drm_display_mode *mode)
  196. {
  197.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  198.  
  199.         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
  200.                 return MODE_NO_DBLESCAN;
  201.  
  202.         /* XXX: Validate clock range */
  203.  
  204.         if (intel_dvo->panel_fixed_mode) {
  205.                 if (mode->hdisplay > intel_dvo->panel_fixed_mode->hdisplay)
  206.                         return MODE_PANEL;
  207.                 if (mode->vdisplay > intel_dvo->panel_fixed_mode->vdisplay)
  208.                         return MODE_PANEL;
  209.         }
  210.  
  211.         return intel_dvo->dev.dev_ops->mode_valid(&intel_dvo->dev, mode);
  212. }
  213.  
  214. static bool intel_dvo_mode_fixup(struct drm_encoder *encoder,
  215.                                  const struct drm_display_mode *mode,
  216.                                  struct drm_display_mode *adjusted_mode)
  217. {
  218.         struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
  219.  
  220.         /* If we have timings from the BIOS for the panel, put them in
  221.          * to the adjusted mode.  The CRTC will be set up for this mode,
  222.          * with the panel scaling set up to source from the H/VDisplay
  223.          * of the original mode.
  224.          */
  225.         if (intel_dvo->panel_fixed_mode != NULL) {
  226. #define C(x) adjusted_mode->x = intel_dvo->panel_fixed_mode->x
  227.                 C(hdisplay);
  228.                 C(hsync_start);
  229.                 C(hsync_end);
  230.                 C(htotal);
  231.                 C(vdisplay);
  232.                 C(vsync_start);
  233.                 C(vsync_end);
  234.                 C(vtotal);
  235.                 C(clock);
  236. #undef C
  237.         }
  238.  
  239.         if (intel_dvo->dev.dev_ops->mode_fixup)
  240.                 return intel_dvo->dev.dev_ops->mode_fixup(&intel_dvo->dev, mode, adjusted_mode);
  241.  
  242.         return true;
  243. }
  244.  
  245. static void intel_dvo_mode_set(struct drm_encoder *encoder,
  246.                                struct drm_display_mode *mode,
  247.                                struct drm_display_mode *adjusted_mode)
  248. {
  249.         struct drm_device *dev = encoder->dev;
  250.         struct drm_i915_private *dev_priv = dev->dev_private;
  251.         struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc);
  252.         struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
  253.         int pipe = intel_crtc->pipe;
  254.         u32 dvo_val;
  255.         u32 dvo_reg = intel_dvo->dev.dvo_reg, dvo_srcdim_reg;
  256.         int dpll_reg = DPLL(pipe);
  257.  
  258.         switch (dvo_reg) {
  259.         case DVOA:
  260.         default:
  261.                 dvo_srcdim_reg = DVOA_SRCDIM;
  262.                 break;
  263.         case DVOB:
  264.                 dvo_srcdim_reg = DVOB_SRCDIM;
  265.                 break;
  266.         case DVOC:
  267.                 dvo_srcdim_reg = DVOC_SRCDIM;
  268.                 break;
  269.         }
  270.  
  271.         intel_dvo->dev.dev_ops->mode_set(&intel_dvo->dev, mode, adjusted_mode);
  272.  
  273.         /* Save the data order, since I don't know what it should be set to. */
  274.         dvo_val = I915_READ(dvo_reg) &
  275.                   (DVO_PRESERVE_MASK | DVO_DATA_ORDER_GBRG);
  276.         dvo_val |= DVO_DATA_ORDER_FP | DVO_BORDER_ENABLE |
  277.                    DVO_BLANK_ACTIVE_HIGH;
  278.  
  279.         if (pipe == 1)
  280.                 dvo_val |= DVO_PIPE_B_SELECT;
  281.         dvo_val |= DVO_PIPE_STALL;
  282.         if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
  283.                 dvo_val |= DVO_HSYNC_ACTIVE_HIGH;
  284.         if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
  285.                 dvo_val |= DVO_VSYNC_ACTIVE_HIGH;
  286.  
  287.         I915_WRITE(dpll_reg, I915_READ(dpll_reg) | DPLL_DVO_HIGH_SPEED);
  288.  
  289.         /*I915_WRITE(DVOB_SRCDIM,
  290.           (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
  291.           (adjusted_mode->VDisplay << DVO_SRCDIM_VERTICAL_SHIFT));*/
  292.         I915_WRITE(dvo_srcdim_reg,
  293.                    (adjusted_mode->hdisplay << DVO_SRCDIM_HORIZONTAL_SHIFT) |
  294.                    (adjusted_mode->vdisplay << DVO_SRCDIM_VERTICAL_SHIFT));
  295.         /*I915_WRITE(DVOB, dvo_val);*/
  296.         I915_WRITE(dvo_reg, dvo_val);
  297. }
  298.  
  299. /**
  300.  * Detect the output connection on our DVO device.
  301.  *
  302.  * Unimplemented.
  303.  */
  304. static enum drm_connector_status
  305. intel_dvo_detect(struct drm_connector *connector, bool force)
  306. {
  307.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  308.         return intel_dvo->dev.dev_ops->detect(&intel_dvo->dev);
  309. }
  310.  
  311. static int intel_dvo_get_modes(struct drm_connector *connector)
  312. {
  313.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  314.         struct drm_i915_private *dev_priv = connector->dev->dev_private;
  315.  
  316.         /* We should probably have an i2c driver get_modes function for those
  317.          * devices which will have a fixed set of modes determined by the chip
  318.          * (TV-out, for example), but for now with just TMDS and LVDS,
  319.          * that's not the case.
  320.          */
  321.         intel_ddc_get_modes(connector,
  322.                             intel_gmbus_get_adapter(dev_priv, GMBUS_PORT_DPC));
  323.         if (!list_empty(&connector->probed_modes))
  324.                 return 1;
  325.  
  326.         if (intel_dvo->panel_fixed_mode != NULL) {
  327.                 struct drm_display_mode *mode;
  328.                 mode = drm_mode_duplicate(connector->dev, intel_dvo->panel_fixed_mode);
  329.                 if (mode) {
  330.                         drm_mode_probed_add(connector, mode);
  331.                         return 1;
  332.                 }
  333.         }
  334.  
  335.         return 0;
  336. }
  337.  
  338. static void intel_dvo_destroy(struct drm_connector *connector)
  339. {
  340.         drm_sysfs_connector_remove(connector);
  341.         drm_connector_cleanup(connector);
  342.         kfree(connector);
  343. }
  344.  
  345. static const struct drm_encoder_helper_funcs intel_dvo_helper_funcs = {
  346.         .mode_fixup = intel_dvo_mode_fixup,
  347.         .mode_set = intel_dvo_mode_set,
  348. };
  349.  
  350. static const struct drm_connector_funcs intel_dvo_connector_funcs = {
  351.         .dpms = intel_dvo_dpms,
  352.         .detect = intel_dvo_detect,
  353.         .destroy = intel_dvo_destroy,
  354.         .fill_modes = drm_helper_probe_single_connector_modes,
  355. };
  356.  
  357. static const struct drm_connector_helper_funcs intel_dvo_connector_helper_funcs = {
  358.         .mode_valid = intel_dvo_mode_valid,
  359.         .get_modes = intel_dvo_get_modes,
  360.         .best_encoder = intel_best_encoder,
  361. };
  362.  
  363. static void intel_dvo_enc_destroy(struct drm_encoder *encoder)
  364. {
  365.         struct intel_dvo *intel_dvo = enc_to_intel_dvo(encoder);
  366.  
  367.         if (intel_dvo->dev.dev_ops->destroy)
  368.                 intel_dvo->dev.dev_ops->destroy(&intel_dvo->dev);
  369.  
  370.         kfree(intel_dvo->panel_fixed_mode);
  371.  
  372.         intel_encoder_destroy(encoder);
  373. }
  374.  
  375. static const struct drm_encoder_funcs intel_dvo_enc_funcs = {
  376.         .destroy = intel_dvo_enc_destroy,
  377. };
  378.  
  379. /**
  380.  * Attempts to get a fixed panel timing for LVDS (currently only the i830).
  381.  *
  382.  * Other chips with DVO LVDS will need to extend this to deal with the LVDS
  383.  * chip being on DVOB/C and having multiple pipes.
  384.  */
  385. static struct drm_display_mode *
  386. intel_dvo_get_current_mode(struct drm_connector *connector)
  387. {
  388.         struct drm_device *dev = connector->dev;
  389.         struct drm_i915_private *dev_priv = dev->dev_private;
  390.         struct intel_dvo *intel_dvo = intel_attached_dvo(connector);
  391.         uint32_t dvo_val = I915_READ(intel_dvo->dev.dvo_reg);
  392.         struct drm_display_mode *mode = NULL;
  393.  
  394.         /* If the DVO port is active, that'll be the LVDS, so we can pull out
  395.          * its timings to get how the BIOS set up the panel.
  396.          */
  397.         if (dvo_val & DVO_ENABLE) {
  398.                 struct drm_crtc *crtc;
  399.                 int pipe = (dvo_val & DVO_PIPE_B_SELECT) ? 1 : 0;
  400.  
  401.                 crtc = intel_get_crtc_for_pipe(dev, pipe);
  402.                 if (crtc) {
  403.                         mode = intel_crtc_mode_get(dev, crtc);
  404.                         if (mode) {
  405.                                 mode->type |= DRM_MODE_TYPE_PREFERRED;
  406.                                 if (dvo_val & DVO_HSYNC_ACTIVE_HIGH)
  407.                                         mode->flags |= DRM_MODE_FLAG_PHSYNC;
  408.                                 if (dvo_val & DVO_VSYNC_ACTIVE_HIGH)
  409.                                         mode->flags |= DRM_MODE_FLAG_PVSYNC;
  410.                         }
  411.                 }
  412.         }
  413.  
  414.         return mode;
  415. }
  416.  
  417. void intel_dvo_init(struct drm_device *dev)
  418. {
  419.         struct drm_i915_private *dev_priv = dev->dev_private;
  420.         struct intel_encoder *intel_encoder;
  421.         struct intel_dvo *intel_dvo;
  422.         struct intel_connector *intel_connector;
  423.         int i;
  424.         int encoder_type = DRM_MODE_ENCODER_NONE;
  425.  
  426.         intel_dvo = kzalloc(sizeof(struct intel_dvo), GFP_KERNEL);
  427.         if (!intel_dvo)
  428.                 return;
  429.  
  430.         intel_connector = kzalloc(sizeof(struct intel_connector), GFP_KERNEL);
  431.         if (!intel_connector) {
  432.                 kfree(intel_dvo);
  433.                 return;
  434.         }
  435.  
  436.         intel_encoder = &intel_dvo->base;
  437.         drm_encoder_init(dev, &intel_encoder->base,
  438.                          &intel_dvo_enc_funcs, encoder_type);
  439.  
  440.         intel_encoder->disable = intel_disable_dvo;
  441.         intel_encoder->enable = intel_enable_dvo;
  442.         intel_encoder->get_hw_state = intel_dvo_get_hw_state;
  443.         intel_connector->get_hw_state = intel_dvo_connector_get_hw_state;
  444.  
  445.         /* Now, try to find a controller */
  446.         for (i = 0; i < ARRAY_SIZE(intel_dvo_devices); i++) {
  447.                 struct drm_connector *connector = &intel_connector->base;
  448.                 const struct intel_dvo_device *dvo = &intel_dvo_devices[i];
  449.                 struct i2c_adapter *i2c;
  450.                 int gpio;
  451.  
  452.                 /* Allow the I2C driver info to specify the GPIO to be used in
  453.                  * special cases, but otherwise default to what's defined
  454.                  * in the spec.
  455.                  */
  456.                 if (intel_gmbus_is_port_valid(dvo->gpio))
  457.                         gpio = dvo->gpio;
  458.                 else if (dvo->type == INTEL_DVO_CHIP_LVDS)
  459.                         gpio = GMBUS_PORT_SSC;
  460.                 else
  461.                         gpio = GMBUS_PORT_DPB;
  462.  
  463.                 /* Set up the I2C bus necessary for the chip we're probing.
  464.                  * It appears that everything is on GPIOE except for panels
  465.                  * on i830 laptops, which are on GPIOB (DVOA).
  466.                  */
  467.                 i2c = intel_gmbus_get_adapter(dev_priv, gpio);
  468.  
  469.                 intel_dvo->dev = *dvo;
  470.                 if (!dvo->dev_ops->init(&intel_dvo->dev, i2c))
  471.                         continue;
  472.  
  473.                 intel_encoder->type = INTEL_OUTPUT_DVO;
  474.                 intel_encoder->crtc_mask = (1 << 0) | (1 << 1);
  475.                 switch (dvo->type) {
  476.                 case INTEL_DVO_CHIP_TMDS:
  477.                         intel_encoder->cloneable = true;
  478.                         drm_connector_init(dev, connector,
  479.                                            &intel_dvo_connector_funcs,
  480.                                            DRM_MODE_CONNECTOR_DVII);
  481.                         encoder_type = DRM_MODE_ENCODER_TMDS;
  482.                         break;
  483.                 case INTEL_DVO_CHIP_LVDS:
  484.                         intel_encoder->cloneable = false;
  485.                         drm_connector_init(dev, connector,
  486.                                            &intel_dvo_connector_funcs,
  487.                                            DRM_MODE_CONNECTOR_LVDS);
  488.                         encoder_type = DRM_MODE_ENCODER_LVDS;
  489.                         break;
  490.                 }
  491.  
  492.                 drm_connector_helper_add(connector,
  493.                                          &intel_dvo_connector_helper_funcs);
  494.                 connector->display_info.subpixel_order = SubPixelHorizontalRGB;
  495.                 connector->interlace_allowed = false;
  496.                 connector->doublescan_allowed = false;
  497.  
  498.                 drm_encoder_helper_add(&intel_encoder->base,
  499.                                        &intel_dvo_helper_funcs);
  500.  
  501.                 intel_connector_attach_encoder(intel_connector, intel_encoder);
  502.                 if (dvo->type == INTEL_DVO_CHIP_LVDS) {
  503.                         /* For our LVDS chipsets, we should hopefully be able
  504.                          * to dig the fixed panel mode out of the BIOS data.
  505.                          * However, it's in a different format from the BIOS
  506.                          * data on chipsets with integrated LVDS (stored in AIM
  507.                          * headers, likely), so for now, just get the current
  508.                          * mode being output through DVO.
  509.                          */
  510.                         intel_dvo->panel_fixed_mode =
  511.                                 intel_dvo_get_current_mode(connector);
  512.                         intel_dvo->panel_wants_dither = true;
  513.                 }
  514.  
  515.                 drm_sysfs_connector_add(connector);
  516.                 return;
  517.         }
  518.  
  519.         drm_encoder_cleanup(&intel_encoder->base);
  520.         kfree(intel_dvo);
  521.         kfree(intel_connector);
  522. }
  523.