Merge drm/drm-next into drm-intel-next-queued
[sfrench/cifs-2.6.git] / 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 }