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}