intel_dsi.c revision 1.1 
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 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
55enum 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
80struct 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
114enum drm_panel_orientation
115intel_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