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 int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
13 {
14 	int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
15 
16 	if (WARN_ON(bpp < 0))
17 		bpp = 16;
18 
19 	return intel_dsi->pclk * bpp / intel_dsi->lane_count;
20 }
21 
22 int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
23 {
24 	switch (intel_dsi->escape_clk_div) {
25 	default:
26 	case 0:
27 		return 50;
28 	case 1:
29 		return 100;
30 	case 2:
31 		return 200;
32 	}
33 }
34 
35 int intel_dsi_get_modes(struct drm_connector *connector)
36 {
37 	return intel_panel_get_modes(to_intel_connector(connector));
38 }
39 
40 enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
41 					  struct drm_display_mode *mode)
42 {
43 	struct drm_i915_private *dev_priv = to_i915(connector->dev);
44 	struct intel_connector *intel_connector = to_intel_connector(connector);
45 	const struct drm_display_mode *fixed_mode =
46 		intel_panel_fixed_mode(intel_connector, mode);
47 	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
48 	enum drm_mode_status status;
49 
50 	drm_dbg_kms(&dev_priv->drm, "\n");
51 
52 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
53 		return MODE_NO_DBLESCAN;
54 
55 	status = intel_panel_mode_valid(intel_connector, mode);
56 	if (status != MODE_OK)
57 		return status;
58 
59 	if (fixed_mode->clock > max_dotclk)
60 		return MODE_CLOCK_HIGH;
61 
62 	return intel_mode_valid_max_plane_size(dev_priv, mode, false);
63 }
64 
65 struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
66 					   const struct mipi_dsi_host_ops *funcs,
67 					   enum port port)
68 {
69 	struct intel_dsi_host *host;
70 	struct mipi_dsi_device *device;
71 
72 	host = kzalloc(sizeof(*host), GFP_KERNEL);
73 	if (!host)
74 		return NULL;
75 
76 	host->base.ops = funcs;
77 	host->intel_dsi = intel_dsi;
78 	host->port = port;
79 
80 	/*
81 	 * We should call mipi_dsi_host_register(&host->base) here, but we don't
82 	 * have a host->dev, and we don't have OF stuff either. So just use the
83 	 * dsi framework as a library and hope for the best. Create the dsi
84 	 * devices by ourselves here too. Need to be careful though, because we
85 	 * don't initialize any of the driver model devices here.
86 	 */
87 	device = kzalloc(sizeof(*device), GFP_KERNEL);
88 	if (!device) {
89 		kfree(host);
90 		return NULL;
91 	}
92 
93 	device->host = &host->base;
94 	host->device = device;
95 
96 	return host;
97 }
98 
99 enum drm_panel_orientation
100 intel_dsi_get_panel_orientation(struct intel_connector *connector)
101 {
102 	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
103 	enum drm_panel_orientation orientation;
104 
105 	orientation = connector->panel.vbt.dsi.orientation;
106 	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
107 		return orientation;
108 
109 	orientation = dev_priv->display.vbt.orientation;
110 	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
111 		return orientation;
112 
113 	return DRM_MODE_PANEL_ORIENTATION_NORMAL;
114 }
115