intel_dsi.c revision 1.3 
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
9int 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
19int 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
32int intel_dsi_get_modes(struct drm_connector *connector)
33{
34	struct drm_i915_private *i915 = to_i915(connector->dev);
35	struct intel_connector *intel_connector = to_intel_connector(connector);
36	struct drm_display_mode *mode;
37
38	drm_dbg_kms(&i915->drm, "\n");
39
40	if (!intel_connector->panel.fixed_mode) {
41		drm_dbg_kms(&i915->drm, "no fixed mode\n");
42		return 0;
43	}
44
45	mode = drm_mode_duplicate(connector->dev,
46				  intel_connector->panel.fixed_mode);
47	if (!mode) {
48		drm_dbg_kms(&i915->drm, "drm_mode_duplicate failed\n");
49		return 0;
50	}
51
52	drm_mode_probed_add(connector, mode);
53	return 1;
54}
55
56enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
57					  struct drm_display_mode *mode)
58{
59	struct drm_i915_private *dev_priv = to_i915(connector->dev);
60	struct intel_connector *intel_connector = to_intel_connector(connector);
61	const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
62	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
63
64	drm_dbg_kms(&dev_priv->drm, "\n");
65
66	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
67		return MODE_NO_DBLESCAN;
68
69	if (fixed_mode) {
70		if (mode->hdisplay > fixed_mode->hdisplay)
71			return MODE_PANEL;
72		if (mode->vdisplay > fixed_mode->vdisplay)
73			return MODE_PANEL;
74		if (fixed_mode->clock > max_dotclk)
75			return MODE_CLOCK_HIGH;
76	}
77
78	return intel_mode_valid_max_plane_size(dev_priv, mode, false);
79}
80
81struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
82					   const struct mipi_dsi_host_ops *funcs,
83					   enum port port)
84{
85	struct intel_dsi_host *host;
86	struct mipi_dsi_device *device;
87
88	host = kzalloc(sizeof(*host), GFP_KERNEL);
89	if (!host)
90		return NULL;
91
92	host->base.ops = funcs;
93	host->intel_dsi = intel_dsi;
94	host->port = port;
95
96	/*
97	 * We should call mipi_dsi_host_register(&host->base) here, but we don't
98	 * have a host->dev, and we don't have OF stuff either. So just use the
99	 * dsi framework as a library and hope for the best. Create the dsi
100	 * devices by ourselves here too. Need to be careful though, because we
101	 * don't initialize any of the driver model devices here.
102	 */
103	device = kzalloc(sizeof(*device), GFP_KERNEL);
104	if (!device) {
105		kfree(host);
106		return NULL;
107	}
108
109	device->host = &host->base;
110	host->device = device;
111
112	return host;
113}
114
115enum drm_panel_orientation
116intel_dsi_get_panel_orientation(struct intel_connector *connector)
117{
118	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
119	enum drm_panel_orientation orientation;
120
121	orientation = dev_priv->vbt.dsi.orientation;
122	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
123		return orientation;
124
125	orientation = dev_priv->vbt.orientation;
126	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
127		return orientation;
128
129	return DRM_MODE_PANEL_ORIENTATION_NORMAL;
130}
131