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 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
intel_dsi_mode_valid(struct drm_connector * connector,struct drm_display_mode * mode)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
intel_dsi_host_init(struct intel_dsi * intel_dsi,const struct mipi_dsi_host_ops * funcs,enum port port)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
intel_dsi_get_panel_orientation(struct intel_connector * connector)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 }
129
