1// SPDX-License-Identifier: MIT
2/*
3 * Copyright © 2018 Intel Corporation
4 */
5
6#include <drm/drm_mipi_dsi.h>
7
8#include "i915_drv.h"
9#include "intel_dsi.h"
10#include "intel_panel.h"
11
12void intel_dsi_wait_panel_power_cycle(struct intel_dsi *intel_dsi)
13{
14 ktime_t panel_power_on_time;
15 s64 panel_power_off_duration;
16
17 panel_power_on_time = ktime_get_boottime();
18 panel_power_off_duration = ktime_ms_delta(later: panel_power_on_time,
19 earlier: intel_dsi->panel_power_off_time);
20
21 if (panel_power_off_duration < (s64)intel_dsi->panel_pwr_cycle_delay)
22 msleep(msecs: intel_dsi->panel_pwr_cycle_delay - panel_power_off_duration);
23}
24
25void intel_dsi_shutdown(struct intel_encoder *encoder)
26{
27 struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
28
29 intel_dsi_wait_panel_power_cycle(intel_dsi);
30}
31
32int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
33{
34 int bpp = mipi_dsi_pixel_format_to_bpp(fmt: intel_dsi->pixel_format);
35
36 if (WARN_ON(bpp < 0))
37 bpp = 16;
38
39 return intel_dsi->pclk * bpp / intel_dsi->lane_count;
40}
41
42int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
43{
44 switch (intel_dsi->escape_clk_div) {
45 default:
46 case 0:
47 return 50;
48 case 1:
49 return 100;
50 case 2:
51 return 200;
52 }
53}
54
55int intel_dsi_get_modes(struct drm_connector *connector)
56{
57 return intel_panel_get_modes(to_intel_connector(connector));
58}
59
60enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
61 struct drm_display_mode *mode)
62{
63 struct drm_i915_private *dev_priv = to_i915(dev: connector->dev);
64 struct intel_connector *intel_connector = to_intel_connector(connector);
65 const struct drm_display_mode *fixed_mode =
66 intel_panel_fixed_mode(connector: intel_connector, mode);
67 int max_dotclk = to_i915(dev: connector->dev)->max_dotclk_freq;
68 enum drm_mode_status status;
69
70 drm_dbg_kms(&dev_priv->drm, "\n");
71
72 if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
73 return MODE_NO_DBLESCAN;
74
75 status = intel_panel_mode_valid(connector: intel_connector, mode);
76 if (status != MODE_OK)
77 return status;
78
79 if (fixed_mode->clock > max_dotclk)
80 return MODE_CLOCK_HIGH;
81
82 return intel_mode_valid_max_plane_size(dev_priv, mode, bigjoiner: false);
83}
84
85struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
86 const struct mipi_dsi_host_ops *funcs,
87 enum port port)
88{
89 struct intel_dsi_host *host;
90 struct mipi_dsi_device *device;
91
92 host = kzalloc(size: sizeof(*host), GFP_KERNEL);
93 if (!host)
94 return NULL;
95
96 host->base.ops = funcs;
97 host->intel_dsi = intel_dsi;
98 host->port = port;
99
100 /*
101 * We should call mipi_dsi_host_register(&host->base) here, but we don't
102 * have a host->dev, and we don't have OF stuff either. So just use the
103 * dsi framework as a library and hope for the best. Create the dsi
104 * devices by ourselves here too. Need to be careful though, because we
105 * don't initialize any of the driver model devices here.
106 */
107 device = kzalloc(size: sizeof(*device), GFP_KERNEL);
108 if (!device) {
109 kfree(objp: host);
110 return NULL;
111 }
112
113 device->host = &host->base;
114 host->device = device;
115
116 return host;
117}
118
119enum drm_panel_orientation
120intel_dsi_get_panel_orientation(struct intel_connector *connector)
121{
122 struct drm_i915_private *dev_priv = to_i915(dev: connector->base.dev);
123 enum drm_panel_orientation orientation;
124
125 orientation = connector->panel.vbt.dsi.orientation;
126 if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
127 return orientation;
128
129 orientation = dev_priv->display.vbt.orientation;
130 if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
131 return orientation;
132
133 return DRM_MODE_PANEL_ORIENTATION_NORMAL;
134}
135

source code of linux/drivers/gpu/drm/i915/display/intel_dsi.c