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

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