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 12 void 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 msleep(intel_dsi->panel_pwr_cycle_delay - panel_power_off_duration); 23 } 24 25 void 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 32 int 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 42 int 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 55 int intel_dsi_get_modes(struct drm_connector *connector) 56 { 57 return intel_panel_get_modes(to_intel_connector(connector)); 58 } 59 60 enum 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 status = intel_panel_mode_valid(intel_connector, mode); 73 if (status != MODE_OK) 74 return status; 75 76 if (fixed_mode->clock > max_dotclk) 77 return MODE_CLOCK_HIGH; 78 79 return intel_mode_valid_max_plane_size(dev_priv, mode, false); 80 } 81 82 struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi, 83 const struct mipi_dsi_host_ops *funcs, 84 enum port port) 85 { 86 struct intel_dsi_host *host; 87 struct mipi_dsi_device *device; 88 89 host = kzalloc(sizeof(*host), GFP_KERNEL); 90 if (!host) 91 return NULL; 92 93 host->base.ops = funcs; 94 host->intel_dsi = intel_dsi; 95 host->port = port; 96 97 /* 98 * We should call mipi_dsi_host_register(&host->base) here, but we don't 99 * have a host->dev, and we don't have OF stuff either. So just use the 100 * dsi framework as a library and hope for the best. Create the dsi 101 * devices by ourselves here too. Need to be careful though, because we 102 * don't initialize any of the driver model devices here. 103 */ 104 device = kzalloc(sizeof(*device), GFP_KERNEL); 105 if (!device) { 106 kfree(host); 107 return NULL; 108 } 109 110 device->host = &host->base; 111 host->device = device; 112 113 return host; 114 } 115 116 enum drm_panel_orientation 117 intel_dsi_get_panel_orientation(struct intel_connector *connector) 118 { 119 struct drm_i915_private *dev_priv = to_i915(connector->base.dev); 120 enum drm_panel_orientation orientation; 121 122 orientation = connector->panel.vbt.dsi.orientation; 123 if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) 124 return orientation; 125 126 orientation = dev_priv->display.vbt.orientation; 127 if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN) 128 return orientation; 129 130 return DRM_MODE_PANEL_ORIENTATION_NORMAL; 131 } 132