Jani Nikula | 9019835 | 2016-04-26 16:14:25 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2016 Intel Corporation |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 21 | * DEALINGS IN THE SOFTWARE. |
| 22 | * |
| 23 | * Author: Deepak M <m.deepak at intel.com> |
| 24 | */ |
| 25 | |
| 26 | #include "intel_drv.h" |
| 27 | #include "intel_dsi.h" |
| 28 | #include "i915_drv.h" |
| 29 | #include <video/mipi_display.h> |
| 30 | #include <drm/drm_mipi_dsi.h> |
| 31 | |
| 32 | #define CONTROL_DISPLAY_BCTRL (1 << 5) |
| 33 | #define CONTROL_DISPLAY_DD (1 << 3) |
| 34 | #define CONTROL_DISPLAY_BL (1 << 2) |
| 35 | |
Deepak M | 1ecc1c6 | 2016-04-26 16:14:26 +0300 | [diff] [blame] | 36 | #define POWER_SAVE_OFF (0 << 0) |
| 37 | #define POWER_SAVE_LOW (1 << 0) |
| 38 | #define POWER_SAVE_MEDIUM (2 << 0) |
| 39 | #define POWER_SAVE_HIGH (3 << 0) |
| 40 | #define POWER_SAVE_OUTDOOR_MODE (4 << 0) |
| 41 | |
Jani Nikula | 9019835 | 2016-04-26 16:14:25 +0300 | [diff] [blame] | 42 | #define PANEL_PWM_MAX_VALUE 0xFF |
| 43 | |
| 44 | static u32 dcs_get_backlight(struct intel_connector *connector) |
| 45 | { |
| 46 | struct intel_encoder *encoder = connector->encoder; |
| 47 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
| 48 | struct mipi_dsi_device *dsi_device; |
| 49 | u8 data; |
| 50 | enum port port; |
| 51 | |
| 52 | /* FIXME: Need to take care of 16 bit brightness level */ |
| 53 | for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) { |
| 54 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
| 55 | mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_DISPLAY_BRIGHTNESS, |
| 56 | &data, sizeof(data)); |
| 57 | break; |
| 58 | } |
| 59 | |
| 60 | return data; |
| 61 | } |
| 62 | |
| 63 | static void dcs_set_backlight(struct intel_connector *connector, u32 level) |
| 64 | { |
| 65 | struct intel_encoder *encoder = connector->encoder; |
| 66 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
| 67 | struct mipi_dsi_device *dsi_device; |
| 68 | u8 data = level; |
| 69 | enum port port; |
| 70 | |
| 71 | /* FIXME: Need to take care of 16 bit brightness level */ |
| 72 | for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) { |
| 73 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
| 74 | mipi_dsi_dcs_write(dsi_device, MIPI_DCS_SET_DISPLAY_BRIGHTNESS, |
| 75 | &data, sizeof(data)); |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static void dcs_disable_backlight(struct intel_connector *connector) |
| 80 | { |
| 81 | struct intel_encoder *encoder = connector->encoder; |
| 82 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
| 83 | struct mipi_dsi_device *dsi_device; |
| 84 | enum port port; |
| 85 | |
| 86 | dcs_set_backlight(connector, 0); |
| 87 | |
Deepak M | 1ecc1c6 | 2016-04-26 16:14:26 +0300 | [diff] [blame] | 88 | for_each_dsi_port(port, intel_dsi->dcs_cabc_ports) { |
| 89 | u8 cabc = POWER_SAVE_OFF; |
| 90 | |
| 91 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
| 92 | mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_POWER_SAVE, |
| 93 | &cabc, sizeof(cabc)); |
| 94 | } |
| 95 | |
Jani Nikula | 9019835 | 2016-04-26 16:14:25 +0300 | [diff] [blame] | 96 | for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) { |
| 97 | u8 ctrl = 0; |
| 98 | |
| 99 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
| 100 | |
| 101 | mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_CONTROL_DISPLAY, |
| 102 | &ctrl, sizeof(ctrl)); |
| 103 | |
| 104 | ctrl &= ~CONTROL_DISPLAY_BL; |
| 105 | ctrl &= ~CONTROL_DISPLAY_DD; |
| 106 | ctrl &= ~CONTROL_DISPLAY_BCTRL; |
| 107 | |
| 108 | mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY, |
| 109 | &ctrl, sizeof(ctrl)); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | static void dcs_enable_backlight(struct intel_connector *connector) |
| 114 | { |
| 115 | struct intel_encoder *encoder = connector->encoder; |
| 116 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
| 117 | struct intel_panel *panel = &connector->panel; |
| 118 | struct mipi_dsi_device *dsi_device; |
| 119 | enum port port; |
| 120 | |
| 121 | for_each_dsi_port(port, intel_dsi->dcs_backlight_ports) { |
| 122 | u8 ctrl = 0; |
| 123 | |
| 124 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
| 125 | |
| 126 | mipi_dsi_dcs_read(dsi_device, MIPI_DCS_GET_CONTROL_DISPLAY, |
| 127 | &ctrl, sizeof(ctrl)); |
| 128 | |
| 129 | ctrl |= CONTROL_DISPLAY_BL; |
| 130 | ctrl |= CONTROL_DISPLAY_DD; |
| 131 | ctrl |= CONTROL_DISPLAY_BCTRL; |
| 132 | |
| 133 | mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_CONTROL_DISPLAY, |
| 134 | &ctrl, sizeof(ctrl)); |
| 135 | } |
| 136 | |
Deepak M | 1ecc1c6 | 2016-04-26 16:14:26 +0300 | [diff] [blame] | 137 | for_each_dsi_port(port, intel_dsi->dcs_cabc_ports) { |
| 138 | u8 cabc = POWER_SAVE_MEDIUM; |
| 139 | |
| 140 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
| 141 | mipi_dsi_dcs_write(dsi_device, MIPI_DCS_WRITE_POWER_SAVE, |
| 142 | &cabc, sizeof(cabc)); |
| 143 | } |
| 144 | |
Jani Nikula | 9019835 | 2016-04-26 16:14:25 +0300 | [diff] [blame] | 145 | dcs_set_backlight(connector, panel->backlight.level); |
| 146 | } |
| 147 | |
| 148 | static int dcs_setup_backlight(struct intel_connector *connector, |
| 149 | enum pipe unused) |
| 150 | { |
| 151 | struct intel_panel *panel = &connector->panel; |
| 152 | |
| 153 | panel->backlight.max = PANEL_PWM_MAX_VALUE; |
| 154 | panel->backlight.level = PANEL_PWM_MAX_VALUE; |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | int intel_dsi_dcs_init_backlight_funcs(struct intel_connector *intel_connector) |
| 160 | { |
| 161 | struct drm_device *dev = intel_connector->base.dev; |
Chris Wilson | fac5e23 | 2016-07-04 11:34:36 +0100 | [diff] [blame] | 162 | struct drm_i915_private *dev_priv = to_i915(dev); |
Jani Nikula | 9019835 | 2016-04-26 16:14:25 +0300 | [diff] [blame] | 163 | struct intel_encoder *encoder = intel_connector->encoder; |
| 164 | struct intel_panel *panel = &intel_connector->panel; |
| 165 | |
| 166 | if (dev_priv->vbt.backlight.type != INTEL_BACKLIGHT_DSI_DCS) |
| 167 | return -ENODEV; |
| 168 | |
| 169 | if (WARN_ON(encoder->type != INTEL_OUTPUT_DSI)) |
| 170 | return -EINVAL; |
| 171 | |
| 172 | panel->backlight.setup = dcs_setup_backlight; |
| 173 | panel->backlight.enable = dcs_enable_backlight; |
| 174 | panel->backlight.disable = dcs_disable_backlight; |
| 175 | panel->backlight.set = dcs_set_backlight; |
| 176 | panel->backlight.get = dcs_get_backlight; |
| 177 | |
| 178 | return 0; |
| 179 | } |