drivers/gpu/drm/i915/display/intel_dsi.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright © 2018 Intel Corporation
   4  */
   5
   6 #include <drm/drm_mipi_dsi.h>
   7 #include "intel_dsi.h"
   8
   9 int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
  10 {
  11         int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
  12
  13         if (WARN_ON(bpp < 0))
  14                 bpp = 16;
  15
  16         return intel_dsi->pclk * bpp / intel_dsi->lane_count;
  17 }
  18
  19 int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
  20 {
  21         switch (intel_dsi->escape_clk_div) {
  22         default:
  23         case 0:
  24                 return 50;
  25         case 1:
  26                 return 100;
  27         case 2:
  28                 return 200;
  29         }
  30 }
  31
  32 int intel_dsi_get_modes(struct drm_connector *connector)
  33 {
  34         struct drm_i915_private *i915 = to_i915(connector->dev);
  35         struct intel_connector *intel_connector = to_intel_connector(connector);
  36         struct drm_display_mode *mode;
  37
  38         drm_dbg_kms(&i915->drm, "\n");
  39
  40         if (!intel_connector->panel.fixed_mode) {
  41                 drm_dbg_kms(&i915->drm, "no fixed mode\n");
  42                 return 0;
  43         }
  44
  45         mode = drm_mode_duplicate(connector->dev,
  46                                   intel_connector->panel.fixed_mode);
  47         if (!mode) {
  48                 drm_dbg_kms(&i915->drm, "drm_mode_duplicate failed\n");
  49                 return 0;
  50         }
  51
  52         drm_mode_probed_add(connector, mode);
  53         return 1;
  54 }
  55
  56 enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
  57                                           struct drm_display_mode *mode)
  58 {
  59         struct drm_i915_private *dev_priv = to_i915(connector->dev);
  60         struct intel_connector *intel_connector = to_intel_connector(connector);
  61         const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
  62         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
  63
  64         drm_dbg_kms(&dev_priv->drm, "\n");
  65
  66         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
  67                 return MODE_NO_DBLESCAN;
  68
  69         if (fixed_mode) {
  70                 if (mode->hdisplay > fixed_mode->hdisplay)
  71                         return MODE_PANEL;
  72                 if (mode->vdisplay > fixed_mode->vdisplay)
  73                         return MODE_PANEL;
  74                 if (fixed_mode->clock > max_dotclk)
  75                         return MODE_CLOCK_HIGH;
  76         }
  77
  78         return intel_mode_valid_max_plane_size(dev_priv, mode, false);
  79 }
  80
  81 struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
  82                                            const struct mipi_dsi_host_ops *funcs,
  83                                            enum port port)
  84 {
  85         struct intel_dsi_host *host;
  86         struct mipi_dsi_device *device;
  87
  88         host = kzalloc(sizeof(*host), GFP_KERNEL);
  89         if (!host)
  90                 return NULL;
  91
  92         host->base.ops = funcs;
  93         host->intel_dsi = intel_dsi;
  94         host->port = port;
  95
  96         /*
  97          * We should call mipi_dsi_host_register(&host->base) here, but we don't
  98          * have a host->dev, and we don't have OF stuff either. So just use the
  99          * dsi framework as a library and hope for the best. Create the dsi
 100          * devices by ourselves here too. Need to be careful though, because we
 101          * don't initialize any of the driver model devices here.
 102          */
 103         device = kzalloc(sizeof(*device), GFP_KERNEL);
 104         if (!device) {
 105                 kfree(host);
 106                 return NULL;
 107         }
 108
 109         device->host = &host->base;
 110         host->device = device;
 111
 112         return host;
 113 }
 114
 115 enum drm_panel_orientation
 116 intel_dsi_get_panel_orientation(struct intel_connector *connector)
 117 {
 118         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 119         enum drm_panel_orientation orientation;
 120
 121         orientation = dev_priv->vbt.dsi.orientation;
 122         if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
 123                 return orientation;
 124
 125         orientation = dev_priv->vbt.orientation;
 126         if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
 127                 return orientation;
 128
 129         return DRM_MODE_PANEL_ORIENTATION_NORMAL;
 130 }