2 * Copyright (C) 2022 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #define LOG_TAG "hwc-display-configs"
19 #include "HwcDisplayConfigs.h"
23 #include "drm/DrmConnector.h"
24 #include "utils/log.h"
26 constexpr uint32_t kHeadlessModeDisplayWidthMm = 163;
27 constexpr uint32_t kHeadlessModeDisplayHeightMm = 122;
28 constexpr uint32_t kHeadlessModeDisplayWidthPx = 1024;
29 constexpr uint32_t kHeadlessModeDisplayHeightPx = 768;
30 constexpr uint32_t kHeadlessModeDisplayVRefresh = 60;
34 // NOLINTNEXTLINE (readability-function-cognitive-complexity): Fixme
35 HWC2::Error HwcDisplayConfigs::Update(DrmConnector &connector) {
36 /* In case UpdateModes will fail we will still have one mode for headless
41 preferred_config_id = active_config_id = last_config_id;
42 auto headless_drm_mode_info = (drmModeModeInfo){
43 .hdisplay = kHeadlessModeDisplayWidthPx,
44 .vdisplay = kHeadlessModeDisplayHeightPx,
45 .vrefresh = kHeadlessModeDisplayVRefresh,
46 .name = "HEADLESS-MODE",
48 hwc_configs[active_config_id] = (HwcDisplayConfig){
49 .id = active_config_id,
51 .mode = DrmMode(&headless_drm_mode_info),
54 mm_width = kHeadlessModeDisplayWidthMm;
55 mm_height = kHeadlessModeDisplayHeightMm;
57 /* Read real configs */
58 int ret = connector.UpdateModes();
60 ALOGE("Failed to update display modes %d", ret);
61 return HWC2::Error::BadDisplay;
64 if (connector.GetModes().empty()) {
65 ALOGE("No modes reported by KMS");
66 return HWC2::Error::BadDisplay;
70 mm_width = connector.GetMmWidth();
71 mm_height = connector.GetMmHeight();
73 preferred_config_id = 0;
74 int preferred_config_group_id = 0;
76 int first_config_id = last_config_id;
77 int last_group_id = 1;
80 for (const auto &mode : connector.GetModes()) {
81 /* Find group for the new mode or create new group */
83 for (auto &hwc_config : hwc_configs) {
84 if (mode.h_display() == hwc_config.second.mode.h_display() &&
85 mode.v_display() == hwc_config.second.mode.v_display()) {
86 group_found = hwc_config.second.group_id;
89 if (group_found == 0) {
90 group_found = last_group_id++;
93 bool disabled = false;
94 if ((mode.flags() & DRM_MODE_FLAG_3D_MASK) != 0) {
95 ALOGI("Disabling display mode %s (Modes with 3D flag aren't supported)",
101 hwc_configs[last_config_id] = {
102 .id = last_config_id,
103 .group_id = group_found,
105 .disabled = disabled,
108 /* Chwck if the mode is preferred */
109 if ((mode.type() & DRM_MODE_TYPE_PREFERRED) != 0 &&
110 preferred_config_id == 0) {
111 preferred_config_id = last_config_id;
112 preferred_config_group_id = group_found;
118 /* We must have preferred mode. Set first mode as preferred
119 * in case KMS haven't reported anything. */
120 if (preferred_config_id == 0) {
121 preferred_config_id = first_config_id;
122 preferred_config_group_id = 1;
125 for (int group = 1; group < last_group_id; group++) {
126 bool has_interlaced = false;
127 bool has_progressive = false;
128 for (auto &hwc_config : hwc_configs) {
129 if (hwc_config.second.group_id != group || hwc_config.second.disabled) {
133 if (hwc_config.second.IsInterlaced()) {
134 has_interlaced = true;
136 has_progressive = true;
140 bool has_both = has_interlaced && has_progressive;
145 bool group_contains_preferred_interlaced = false;
146 if (group == preferred_config_group_id &&
147 hwc_configs[preferred_config_id].IsInterlaced()) {
148 group_contains_preferred_interlaced = true;
151 for (auto &hwc_config : hwc_configs) {
152 if (hwc_config.second.group_id != group || hwc_config.second.disabled) {
156 bool disable = group_contains_preferred_interlaced
157 ? !hwc_config.second.IsInterlaced()
158 : hwc_config.second.IsInterlaced();
162 "Group %i: Disabling display mode %s (This group should consist "
164 group, hwc_config.second.mode.name().c_str(),
165 group_contains_preferred_interlaced ? "interlaced" : "progressive");
167 hwc_config.second.disabled = true;
172 /* Group should not contain 2 modes with FPS delta less than ~1HZ
173 * otherwise android.graphics.cts.SetFrameRateTest CTS will fail
175 constexpr float kMinFpsDelta = 1.0; // FPS
176 for (int m1 = first_config_id; m1 < last_config_id; m1++) {
177 for (int m2 = first_config_id; m2 < last_config_id; m2++) {
178 if (m1 != m2 && hwc_configs[m1].group_id == hwc_configs[m2].group_id &&
179 !hwc_configs[m1].disabled && !hwc_configs[m2].disabled &&
180 fabsf(hwc_configs[m1].mode.v_refresh() -
181 hwc_configs[m2].mode.v_refresh()) < kMinFpsDelta) {
183 "Group %i: Disabling display mode %s (Refresh rate value is "
184 "too close to existing mode %s)",
185 hwc_configs[m2].group_id, hwc_configs[m2].mode.name().c_str(),
186 hwc_configs[m1].mode.name().c_str());
188 hwc_configs[m2].disabled = true;
193 /* Set active mode to be valid mode */
194 active_config_id = preferred_config_id;
195 return HWC2::Error::None;
198 } // namespace android