intel_dsi.c revision 1.5 
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
12void intel_dsi_wait_panel_power_cycle(struct intel_dsi *intel_dsi)
13{
14	ktime_t panel_power_on_time;
15	s64 panel_power_off_duration;
16
17	panel_power_on_time = ktime_get_boottime();
18	panel_power_off_duration = ktime_ms_delta(panel_power_on_time,
19						  intel_dsi->panel_power_off_time);
20
21	if (panel_power_off_duration < (s64)intel_dsi->panel_pwr_cycle_delay)
22		drm_msleep(intel_dsi->panel_pwr_cycle_delay - panel_power_off_duration);
23}
24
25void intel_dsi_shutdown(struct intel_encoder *encoder)
26{
27	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
28
29	intel_dsi_wait_panel_power_cycle(intel_dsi);
30}
31
32int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
33{
34	int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
35
36	if (WARN_ON(bpp < 0))
37		bpp = 16;
38
39	return intel_dsi->pclk * bpp / intel_dsi->lane_count;
40}
41
42int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
43{
44	switch (intel_dsi->escape_clk_div) {
45	default:
46	case 0:
47		return 50;
48	case 1:
49		return 100;
50	case 2:
51		return 200;
52	}
53}
54
55int intel_dsi_get_modes(struct drm_connector *connector)
56{
57	return intel_panel_get_modes(to_intel_connector(connector));
58}
59
60enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
61					  struct drm_display_mode *mode)
62{
63	struct drm_i915_private *dev_priv = to_i915(connector->dev);
64	struct intel_connector *intel_connector = to_intel_connector(connector);
65	const struct drm_display_mode *fixed_mode =
66		intel_panel_fixed_mode(intel_connector, mode);
67	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
68	enum drm_mode_status status;
69
70	drm_dbg_kms(&dev_priv->drm, "\n");
71
72	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
73		return MODE_NO_DBLESCAN;
74
75	status = intel_panel_mode_valid(intel_connector, mode);
76	if (status != MODE_OK)
77		return status;
78
79	if (fixed_mode->clock > max_dotclk)
80		return MODE_CLOCK_HIGH;
81
82	return intel_mode_valid_max_plane_size(dev_priv, mode, false);
83}
84
85struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
86					   const struct mipi_dsi_host_ops *funcs,
87					   enum port port)
88{
89	struct intel_dsi_host *host;
90	struct mipi_dsi_device *device;
91
92	host = kzalloc(sizeof(*host), GFP_KERNEL);
93	if (!host)
94		return NULL;
95
96	host->base.ops = funcs;
97	host->intel_dsi = intel_dsi;
98	host->port = port;
99
100	/*
101	 * We should call mipi_dsi_host_register(&host->base) here, but we don't
102	 * have a host->dev, and we don't have OF stuff either. So just use the
103	 * dsi framework as a library and hope for the best. Create the dsi
104	 * devices by ourselves here too. Need to be careful though, because we
105	 * don't initialize any of the driver model devices here.
106	 */
107	device = kzalloc(sizeof(*device), GFP_KERNEL);
108	if (!device) {
109		kfree(host);
110		return NULL;
111	}
112
113	device->host = &host->base;
114	host->device = device;
115
116	return host;
117}
118
119enum drm_panel_orientation
120intel_dsi_get_panel_orientation(struct intel_connector *connector)
121{
122	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
123	enum drm_panel_orientation orientation;
124
125	orientation = connector->panel.vbt.dsi.orientation;
126	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
127		return orientation;
128
129	orientation = dev_priv->display.vbt.orientation;
130	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
131		return orientation;
132
133	return DRM_MODE_PANEL_ORIENTATION_NORMAL;
134}
135