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
intel_dsi_bitrate(const struct intel_dsi * intel_dsi)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
intel_dsi_tlpx_ns(const struct intel_dsi * intel_dsi)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
intel_dsi_get_modes(struct drm_connector * connector)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
intel_dsi_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)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);
79 }
80
intel_dsi_host_init(struct intel_dsi * intel_dsi,const struct mipi_dsi_host_ops * funcs,enum port port)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
intel_dsi_get_panel_orientation(struct intel_connector * connector)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 }
131