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
   8 #include "i915_drv.h"
   9 #include "intel_dsi.h"
  10 #include "intel_panel.h"
  11
  12 int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
  13 {
  14         int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
  15
  16         if (WARN_ON(bpp < 0))
  17                 bpp = 16;
  18
  19         return intel_dsi->pclk * bpp / intel_dsi->lane_count;
  20 }
  21
  22 int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
  23 {
  24         switch (intel_dsi->escape_clk_div) {
  25         default:
  26         case 0:
  27                 return 50;
  28         case 1:
  29                 return 100;
  30         case 2:
  31                 return 200;
  32         }
  33 }
  34
  35 int intel_dsi_get_modes(struct drm_connector *connector)
  36 {
  37         return intel_panel_get_modes(to_intel_connector(connector));
  38 }
  39
  40 enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
  41                                           struct drm_display_mode *mode)
  42 {
  43         struct drm_i915_private *dev_priv = to_i915(connector->dev);
  44         struct intel_connector *intel_connector = to_intel_connector(connector);
  45         const struct drm_display_mode *fixed_mode =
  46                 intel_panel_fixed_mode(intel_connector, mode);
  47         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
  48         enum drm_mode_status status;
  49
  50         drm_dbg_kms(&dev_priv->drm, "\n");
  51
  52         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
  53                 return MODE_NO_DBLESCAN;
  54
  55         status = intel_panel_mode_valid(intel_connector, mode);
  56         if (status != MODE_OK)
  57                 return status;
  58
  59         if (fixed_mode->clock > max_dotclk)
  60                 return MODE_CLOCK_HIGH;
  61
  62         return intel_mode_valid_max_plane_size(dev_priv, mode, false);
  63 }
  64
  65 struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
  66                                            const struct mipi_dsi_host_ops *funcs,
  67                                            enum port port)
  68 {
  69         struct intel_dsi_host *host;
  70         struct mipi_dsi_device *device;
  71
  72         host = kzalloc(sizeof(*host), GFP_KERNEL);
  73         if (!host)
  74                 return NULL;
  75
  76         host->base.ops = funcs;
  77         host->intel_dsi = intel_dsi;
  78         host->port = port;
  79
  80         /*
  81          * We should call mipi_dsi_host_register(&host->base) here, but we don't
  82          * have a host->dev, and we don't have OF stuff either. So just use the
  83          * dsi framework as a library and hope for the best. Create the dsi
  84          * devices by ourselves here too. Need to be careful though, because we
  85          * don't initialize any of the driver model devices here.
  86          */
  87         device = kzalloc(sizeof(*device), GFP_KERNEL);
  88         if (!device) {
  89                 kfree(host);
  90                 return NULL;
  91         }
  92
  93         device->host = &host->base;
  94         host->device = device;
  95
  96         return host;
  97 }
  98
  99 enum drm_panel_orientation
 100 intel_dsi_get_panel_orientation(struct intel_connector *connector)
 101 {
 102         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 103         enum drm_panel_orientation orientation;
 104
 105         orientation = connector->panel.vbt.dsi.orientation;
 106         if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
 107                 return orientation;
 108
 109         orientation = dev_priv->display.vbt.orientation;
 110         if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
 111                 return orientation;
 112
 113         return DRM_MODE_PANEL_ORIENTATION_NORMAL;
 114 }