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 #include "intel_panel.h"
9
intel_dsi_bitrate(const struct intel_dsi * intel_dsi)10 int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
11 {
12 int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
13
14 if (WARN_ON(bpp < 0))
15 bpp = 16;
16
17 return intel_dsi->pclk * bpp / intel_dsi->lane_count;
18 }
19
intel_dsi_tlpx_ns(const struct intel_dsi * intel_dsi)20 int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
21 {
22 switch (intel_dsi->escape_clk_div) {
23 default:
24 case 0:
25 return 50;
26 case 1:
27 return 100;
28 case 2:
29 return 200;
30 }
31 }
32
intel_dsi_get_modes(struct drm_connector * connector)33 int intel_dsi_get_modes(struct drm_connector *connector)
34 {
35 struct drm_i915_private *i915 = to_i915(connector->dev);
36 struct intel_connector *intel_connector = to_intel_connector(connector);
37 struct drm_display_mode *mode;
38
39 drm_dbg_kms(&i915->drm, "\n");
40
41 if (!intel_connector->panel.fixed_mode) {
42 drm_dbg_kms(&i915->drm, "no fixed mode\n");
43 return 0;
44 }
45
46 mode = drm_mode_duplicate(connector->dev,
47 intel_connector->panel.fixed_mode);
48 if (!mode) {
49 drm_dbg_kms(&i915->drm, "drm_mode_duplicate failed\n");
50 return 0;
51 }
52
53 drm_mode_probed_add(connector, mode);
54 return 1;
55 }
56
intel_dsi_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)57 enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
58 struct drm_display_mode *mode)
59 {
60 struct drm_i915_private *dev_priv = to_i915(connector->dev);
61 struct intel_connector *intel_connector = to_intel_connector(connector);
62 const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
63 int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
64 enum drm_mode_status status;
65
66 drm_dbg_kms(&dev_priv->drm, "\n");
67
68 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
69 return MODE_NO_DBLESCAN;
70
71 status = intel_panel_mode_valid(intel_connector, mode);
72 if (status != MODE_OK)
73 return status;
74
75 if (fixed_mode->clock > max_dotclk)
76 return MODE_CLOCK_HIGH;
77
78 return intel_mode_valid_max_plane_size(dev_priv, mode, false);
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