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 
12 void 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(panel_power_on_time,
19 						  intel_dsi->panel_power_off_time);
20 
21 	if (panel_power_off_duration < (s64)intel_dsi->panel_pwr_cycle_delay)
22 		msleep(intel_dsi->panel_pwr_cycle_delay - panel_power_off_duration);
23 }
24 
25 void 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 
32 int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
33 {
34 	int bpp = mipi_dsi_pixel_format_to_bpp(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 
42 int 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 
55 int intel_dsi_get_modes(struct drm_connector *connector)
56 {
57 	return intel_panel_get_modes(to_intel_connector(connector));
58 }
59 
60 enum 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(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(intel_connector, mode);
67 	int max_dotclk = to_i915(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(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, false);
83 }
84 
85 struct 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(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(sizeof(*device), GFP_KERNEL);
108 	if (!device) {
109 		kfree(host);
110 		return NULL;
111 	}
112 
113 	device->host = &host->base;
114 	host->device = device;
115 
116 	return host;
117 }
118 
119 enum drm_panel_orientation
120 intel_dsi_get_panel_orientation(struct intel_connector *connector)
121 {
122 	struct drm_i915_private *dev_priv = to_i915(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