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 }
129