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 drm_i915_private *dev_priv = to_i915(connector->dev);
59 	struct intel_connector *intel_connector = to_intel_connector(connector);
60 	const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
61 	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
62 
63 	DRM_DEBUG_KMS("\n");
64 
65 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
66 		return MODE_NO_DBLESCAN;
67 
68 	if (fixed_mode) {
69 		if (mode->hdisplay > fixed_mode->hdisplay)
70 			return MODE_PANEL;
71 		if (mode->vdisplay > fixed_mode->vdisplay)
72 			return MODE_PANEL;
73 		if (fixed_mode->clock > max_dotclk)
74 			return MODE_CLOCK_HIGH;
75 	}
76 
77 	return intel_mode_valid_max_plane_size(dev_priv, mode);
78 }
79 
80 struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
81 					   const struct mipi_dsi_host_ops *funcs,
82 					   enum port port)
83 {
84 	struct intel_dsi_host *host;
85 	struct mipi_dsi_device *device;
86 
87 	host = kzalloc(sizeof(*host), GFP_KERNEL);
88 	if (!host)
89 		return NULL;
90 
91 	host->base.ops = funcs;
92 	host->intel_dsi = intel_dsi;
93 	host->port = port;
94 
95 	/*
96 	 * We should call mipi_dsi_host_register(&host->base) here, but we don't
97 	 * have a host->dev, and we don't have OF stuff either. So just use the
98 	 * dsi framework as a library and hope for the best. Create the dsi
99 	 * devices by ourselves here too. Need to be careful though, because we
100 	 * don't initialize any of the driver model devices here.
101 	 */
102 	device = kzalloc(sizeof(*device), GFP_KERNEL);
103 	if (!device) {
104 		kfree(host);
105 		return NULL;
106 	}
107 
108 	device->host = &host->base;
109 	host->device = device;
110 
111 	return host;
112 }
113 
114 enum drm_panel_orientation
115 intel_dsi_get_panel_orientation(struct intel_connector *connector)
116 {
117 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
118 	enum drm_panel_orientation orientation;
119 
120 	orientation = dev_priv->vbt.dsi.orientation;
121 	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
122 		return orientation;
123 
124 	orientation = dev_priv->vbt.orientation;
125 	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
126 		return orientation;
127 
128 	return DRM_MODE_PANEL_ORIENTATION_NORMAL;
129 }
130