drivers/gpu/drm/i915/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 intel_connector *intel_connector = to_intel_connector(connector);
  35         struct drm_display_mode *mode;
  36
  37         DRM_DEBUG_KMS("\n");
  38
  39         if (!intel_connector->panel.fixed_mode) {
  40                 DRM_DEBUG_KMS("no fixed mode\n");
  41                 return 0;
  42         }
  43
  44         mode = drm_mode_duplicate(connector->dev,
  45                                   intel_connector->panel.fixed_mode);
  46         if (!mode) {
  47                 DRM_DEBUG_KMS("drm_mode_duplicate failed\n");
  48                 return 0;
  49         }
  50
  51         drm_mode_probed_add(connector, mode);
  52         return 1;
  53 }
  54
  55 enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
  56                                           struct drm_display_mode *mode)
  57 {
  58         struct intel_connector *intel_connector = to_intel_connector(connector);
  59         const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
  60         int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
  61
  62         DRM_DEBUG_KMS("\n");
  63
  64         if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
  65                 return MODE_NO_DBLESCAN;
  66
  67         if (fixed_mode) {
  68                 if (mode->hdisplay > fixed_mode->hdisplay)
  69                         return MODE_PANEL;
  70                 if (mode->vdisplay > fixed_mode->vdisplay)
  71                         return MODE_PANEL;
  72                 if (fixed_mode->clock > max_dotclk)
  73                         return MODE_CLOCK_HIGH;
  74         }
  75
  76         return MODE_OK;
  77 }
  78
  79 struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
  80                                            const struct mipi_dsi_host_ops *funcs,
  81                                            enum port port)
  82 {
  83         struct intel_dsi_host *host;
  84         struct mipi_dsi_device *device;
  85
  86         host = kzalloc(sizeof(*host), GFP_KERNEL);
  87         if (!host)
  88                 return NULL;
  89
  90         host->base.ops = funcs;
  91         host->intel_dsi = intel_dsi;
  92         host->port = port;
  93
  94         /*
  95          * We should call mipi_dsi_host_register(&host->base) here, but we don't
  96          * have a host->dev, and we don't have OF stuff either. So just use the
  97          * dsi framework as a library and hope for the best. Create the dsi
  98          * devices by ourselves here too. Need to be careful though, because we
  99          * don't initialize any of the driver model devices here.
 100          */
 101         device = kzalloc(sizeof(*device), GFP_KERNEL);
 102         if (!device) {
 103                 kfree(host);
 104                 return NULL;
 105         }
 106
 107         device->host = &host->base;
 108         host->device = device;
 109
 110         return host;
 111 }
 112
 113 enum drm_panel_orientation
 114 intel_dsi_get_panel_orientation(struct intel_connector *connector)
 115 {
 116         struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
 117         enum drm_panel_orientation orientation;
 118
 119         orientation = dev_priv->vbt.dsi.orientation;
 120         if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
 121                 return orientation;
 122
 123         orientation = dev_priv->vbt.orientation;
 124         if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
 125                 return orientation;
 126
 127         return DRM_MODE_PANEL_ORIENTATION_NORMAL;
 128 }