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 intel_connector *intel_connector = to_intel_connector(connector);
 59	const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
 60	int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
 61
 62	DRM_DEBUG_KMS("\n");
 63
 64	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 65		return MODE_NO_DBLESCAN;
 66
 67	if (fixed_mode) {
 68		if (mode->hdisplay > fixed_mode->hdisplay)
 69			return MODE_PANEL;
 70		if (mode->vdisplay > fixed_mode->vdisplay)
 71			return MODE_PANEL;
 72		if (fixed_mode->clock > max_dotclk)
 73			return MODE_CLOCK_HIGH;
 74	}
 75
 76	return MODE_OK;
 77}
 78
 79struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
 80					   const struct mipi_dsi_host_ops *funcs,
 81					   enum port port)
 82{
 83	struct intel_dsi_host *host;
 84	struct mipi_dsi_device *device;
 85
 86	host = kzalloc(sizeof(*host), GFP_KERNEL);
 87	if (!host)
 88		return NULL;
 89
 90	host->base.ops = funcs;
 91	host->intel_dsi = intel_dsi;
 92	host->port = port;
 93
 94	/*
 95	 * We should call mipi_dsi_host_register(&host->base) here, but we don't
 96	 * have a host->dev, and we don't have OF stuff either. So just use the
 97	 * dsi framework as a library and hope for the best. Create the dsi
 98	 * devices by ourselves here too. Need to be careful though, because we
 99	 * don't initialize any of the driver model devices here.
100	 */
101	device = kzalloc(sizeof(*device), GFP_KERNEL);
102	if (!device) {
103		kfree(host);
104		return NULL;
105	}
106
107	device->host = &host->base;
108	host->device = device;
109
110	return host;
111}
112
113enum drm_panel_orientation
114intel_dsi_get_panel_orientation(struct intel_connector *connector)
115{
116	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
117	enum drm_panel_orientation orientation;
118
119	orientation = dev_priv->vbt.dsi.orientation;
120	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
121		return orientation;
122
123	orientation = dev_priv->vbt.orientation;
124	if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
125		return orientation;
126
127	return DRM_MODE_PANEL_ORIENTATION_NORMAL;
128}