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 <drm/drm_mipi_dsi.h> |
27 | #include <video/mipi_display.h> |
28 | |
29 | #include "i915_drv.h" |
30 | #include "intel_display_types.h" |
31 | #include "intel_dsi.h" |
32 | #include "intel_dsi_dcs_backlight.h" |
33 | |
34 | #define CONTROL_DISPLAY_BCTRL (1 << 5) |
35 | #define CONTROL_DISPLAY_DD (1 << 3) |
36 | #define CONTROL_DISPLAY_BL (1 << 2) |
37 | |
38 | #define POWER_SAVE_OFF (0 << 0) |
39 | #define POWER_SAVE_LOW (1 << 0) |
40 | #define POWER_SAVE_MEDIUM (2 << 0) |
41 | #define POWER_SAVE_HIGH (3 << 0) |
42 | #define POWER_SAVE_OUTDOOR_MODE (4 << 0) |
43 | |
44 | #define PANEL_PWM_MAX_VALUE 0xFF |
45 | |
46 | static u32 dcs_get_backlight(struct intel_connector *connector, enum pipe unused) |
47 | { |
48 | struct intel_encoder *encoder = intel_attached_encoder(connector); |
49 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); |
50 | struct intel_panel *panel = &connector->panel; |
51 | struct mipi_dsi_device *dsi_device; |
52 | u8 data[2] = {}; |
53 | enum port port; |
54 | size_t len = panel->backlight.max > U8_MAX ? 2 : 1; |
55 | |
56 | for_each_dsi_port(port, panel->vbt.dsi.bl_ports) { |
57 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
58 | mipi_dsi_dcs_read(dsi: dsi_device, cmd: MIPI_DCS_GET_DISPLAY_BRIGHTNESS, |
59 | data: &data, len); |
60 | break; |
61 | } |
62 | |
63 | return (data[1] << 8) | data[0]; |
64 | } |
65 | |
66 | static void dcs_set_backlight(const struct drm_connector_state *conn_state, u32 level) |
67 | { |
68 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(to_intel_encoder(conn_state->best_encoder)); |
69 | struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; |
70 | struct mipi_dsi_device *dsi_device; |
71 | u8 data[2] = {}; |
72 | enum port port; |
73 | size_t len = panel->backlight.max > U8_MAX ? 2 : 1; |
74 | unsigned long mode_flags; |
75 | |
76 | if (len == 1) { |
77 | data[0] = level; |
78 | } else { |
79 | data[0] = level >> 8; |
80 | data[1] = level; |
81 | } |
82 | |
83 | for_each_dsi_port(port, panel->vbt.dsi.bl_ports) { |
84 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
85 | mode_flags = dsi_device->mode_flags; |
86 | dsi_device->mode_flags &= ~MIPI_DSI_MODE_LPM; |
87 | mipi_dsi_dcs_write(dsi: dsi_device, cmd: MIPI_DCS_SET_DISPLAY_BRIGHTNESS, |
88 | data: &data, len); |
89 | dsi_device->mode_flags = mode_flags; |
90 | } |
91 | } |
92 | |
93 | static void dcs_disable_backlight(const struct drm_connector_state *conn_state, u32 level) |
94 | { |
95 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(to_intel_encoder(conn_state->best_encoder)); |
96 | struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; |
97 | struct mipi_dsi_device *dsi_device; |
98 | enum port port; |
99 | |
100 | dcs_set_backlight(conn_state, level: 0); |
101 | |
102 | for_each_dsi_port(port, panel->vbt.dsi.cabc_ports) { |
103 | u8 cabc = POWER_SAVE_OFF; |
104 | |
105 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
106 | mipi_dsi_dcs_write(dsi: dsi_device, cmd: MIPI_DCS_WRITE_POWER_SAVE, |
107 | data: &cabc, len: sizeof(cabc)); |
108 | } |
109 | |
110 | for_each_dsi_port(port, panel->vbt.dsi.bl_ports) { |
111 | u8 ctrl = 0; |
112 | |
113 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
114 | |
115 | mipi_dsi_dcs_read(dsi: dsi_device, cmd: MIPI_DCS_GET_CONTROL_DISPLAY, |
116 | data: &ctrl, len: sizeof(ctrl)); |
117 | |
118 | ctrl &= ~CONTROL_DISPLAY_BL; |
119 | ctrl &= ~CONTROL_DISPLAY_DD; |
120 | ctrl &= ~CONTROL_DISPLAY_BCTRL; |
121 | |
122 | mipi_dsi_dcs_write(dsi: dsi_device, cmd: MIPI_DCS_WRITE_CONTROL_DISPLAY, |
123 | data: &ctrl, len: sizeof(ctrl)); |
124 | } |
125 | } |
126 | |
127 | static void dcs_enable_backlight(const struct intel_crtc_state *crtc_state, |
128 | const struct drm_connector_state *conn_state, u32 level) |
129 | { |
130 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(to_intel_encoder(conn_state->best_encoder)); |
131 | struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; |
132 | struct mipi_dsi_device *dsi_device; |
133 | enum port port; |
134 | |
135 | for_each_dsi_port(port, panel->vbt.dsi.bl_ports) { |
136 | u8 ctrl = 0; |
137 | |
138 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
139 | |
140 | mipi_dsi_dcs_read(dsi: dsi_device, cmd: MIPI_DCS_GET_CONTROL_DISPLAY, |
141 | data: &ctrl, len: sizeof(ctrl)); |
142 | |
143 | ctrl |= CONTROL_DISPLAY_BL; |
144 | ctrl |= CONTROL_DISPLAY_DD; |
145 | ctrl |= CONTROL_DISPLAY_BCTRL; |
146 | |
147 | mipi_dsi_dcs_write(dsi: dsi_device, cmd: MIPI_DCS_WRITE_CONTROL_DISPLAY, |
148 | data: &ctrl, len: sizeof(ctrl)); |
149 | } |
150 | |
151 | for_each_dsi_port(port, panel->vbt.dsi.cabc_ports) { |
152 | u8 cabc = POWER_SAVE_MEDIUM; |
153 | |
154 | dsi_device = intel_dsi->dsi_hosts[port]->device; |
155 | mipi_dsi_dcs_write(dsi: dsi_device, cmd: MIPI_DCS_WRITE_POWER_SAVE, |
156 | data: &cabc, len: sizeof(cabc)); |
157 | } |
158 | |
159 | dcs_set_backlight(conn_state, level); |
160 | } |
161 | |
162 | static int dcs_setup_backlight(struct intel_connector *connector, |
163 | enum pipe unused) |
164 | { |
165 | struct drm_i915_private *i915 = to_i915(dev: connector->base.dev); |
166 | struct intel_panel *panel = &connector->panel; |
167 | |
168 | if (panel->vbt.backlight.brightness_precision_bits > 8) |
169 | panel->backlight.max = (1 << panel->vbt.backlight.brightness_precision_bits) - 1; |
170 | else |
171 | panel->backlight.max = PANEL_PWM_MAX_VALUE; |
172 | |
173 | panel->backlight.level = panel->backlight.max; |
174 | |
175 | drm_dbg_kms(&i915->drm, |
176 | "[CONNECTOR:%d:%s] Using DCS for backlight control\n" , |
177 | connector->base.base.id, connector->base.name); |
178 | |
179 | return 0; |
180 | } |
181 | |
182 | static const struct intel_panel_bl_funcs dcs_bl_funcs = { |
183 | .setup = dcs_setup_backlight, |
184 | .enable = dcs_enable_backlight, |
185 | .disable = dcs_disable_backlight, |
186 | .set = dcs_set_backlight, |
187 | .get = dcs_get_backlight, |
188 | }; |
189 | |
190 | int intel_dsi_dcs_init_backlight_funcs(struct intel_connector *intel_connector) |
191 | { |
192 | struct drm_device *dev = intel_connector->base.dev; |
193 | struct intel_encoder *encoder = intel_attached_encoder(connector: intel_connector); |
194 | struct intel_panel *panel = &intel_connector->panel; |
195 | |
196 | if (panel->vbt.backlight.type != INTEL_BACKLIGHT_DSI_DCS) |
197 | return -ENODEV; |
198 | |
199 | if (drm_WARN_ON(dev, encoder->type != INTEL_OUTPUT_DSI)) |
200 | return -EINVAL; |
201 | |
202 | panel->backlight.funcs = &dcs_bl_funcs; |
203 | |
204 | return 0; |
205 | } |
206 | |