intel_dsi.c

  1// SPDX-License-Identifier: MIT
  2/*
  3 * Copyright © 2018 Intel Corporation
  4 */
  5
  6#include <drm/drm_mipi_dsi.h>
  7#include <drm/drm_print.h>
  8
  9#include "intel_display_core.h"
 10#include "intel_dsi.h"
 11#include "intel_panel.h"
 12
 13void intel_dsi_wait_panel_power_cycle(struct intel_dsi *intel_dsi)
 14{
 15	ktime_t panel_power_on_time;
 16	s64 panel_power_off_duration;
 17
 18	panel_power_on_time = ktime_get_boottime();
 19	panel_power_off_duration = ktime_ms_delta(panel_power_on_time,
 20						  intel_dsi->panel_power_off_time);
 21
 22	if (panel_power_off_duration < (s64)intel_dsi->panel_pwr_cycle_delay)
 23		msleep(intel_dsi->panel_pwr_cycle_delay - panel_power_off_duration);
 24}
 25
 26void intel_dsi_shutdown(struct intel_encoder *encoder)
 27{
 28	struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
 29
 30	intel_dsi_wait_panel_power_cycle(intel_dsi);
 31}
 32
 33int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
 34{
 35	int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
 36
 37	if (WARN_ON(bpp < 0))
 38		bpp = 16;
 39
 40	return intel_dsi->pclk * bpp / intel_dsi->lane_count;
 41}
 42
 43int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
 44{
 45	switch (intel_dsi->escape_clk_div) {
 46	default:
 47	case 0:
 48		return 50;
 49	case 1:
 50		return 100;
 51	case 2:
 52		return 200;
 53	}
 54}
 55
 56int intel_dsi_get_modes(struct drm_connector *connector)
 57{
 58	return intel_panel_get_modes(to_intel_connector(connector));
 59}
 60
 61enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
 62					  const struct drm_display_mode *mode)
 63{
 64	struct intel_display *display = to_intel_display(connector->dev);
 65	struct intel_connector *intel_connector = to_intel_connector(connector);
 66	const struct drm_display_mode *fixed_mode =
 67		intel_panel_fixed_mode(intel_connector, mode);
 68	int max_dotclk = display->cdclk.max_dotclk_freq;
 69	enum drm_mode_status status;
 70
 71	drm_dbg_kms(display->drm, "\n");
 72
 73	status = intel_panel_mode_valid(intel_connector, mode);
 74	if (status != MODE_OK)
 75		return status;
 76
 77	if (fixed_mode->clock > max_dotclk)
 78		return MODE_CLOCK_HIGH;
 79
 80	return intel_mode_valid_max_plane_size(display, mode, 1);
 81}
 82
 83struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
 84					   const struct mipi_dsi_host_ops *funcs,
 85					   enum port port)
 86{
 87	struct intel_dsi_host *host;
 88	struct mipi_dsi_device *device;
 89
 90	host = kzalloc(sizeof(*host), GFP_KERNEL);
 91	if (!host)
 92		return NULL;
 93
 94	host->base.ops = funcs;
 95	host->intel_dsi = intel_dsi;
 96	host->port = port;
 97
 98	/*
 99	 * We should call mipi_dsi_host_register(&host->base) here, but we don't
100	 * have a host->dev, and we don't have OF stuff either. So just use the
101	 * dsi framework as a library and hope for the best. Create the dsi
102	 * devices by ourselves here too. Need to be careful though, because we
103	 * don't initialize any of the driver model devices here.
104	 */
105	device = kzalloc(sizeof(*device), GFP_KERNEL);
106	if (!device) {
107		kfree(host);
108		return NULL;
109	}
110
111	device->host = &host->base;
112	host->device = device;
113
114	return host;
115}
116
117enum drm_panel_orientation
118intel_dsi_get_panel_orientation(struct intel_connector *connector)
119{
120	struct intel_display *display = to_intel_display(connector);
121	enum drm_panel_orientation orientation;
122
123	orientation = connector->panel.vbt.dsi.orientation;
124	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
125		return orientation;
126
127	orientation = display->vbt.orientation;
128	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
129		return orientation;
130
131	return DRM_MODE_PANEL_ORIENTATION_NORMAL;
132}