drm_hwcomposer: Initial implementation
This adds a very basic hwcomposer implementation on top of
libdrm.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Change-Id: I472feb9bc08a4c4cd9849370c849d266ea58da9c
diff --git a/hwcomposer.cpp b/hwcomposer.cpp
new file mode 100644
index 0000000..0629f84
--- /dev/null
+++ b/hwcomposer.cpp
@@ -0,0 +1,903 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "hwcomposer-drm"
+
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/param.h>
+
+#include <cutils/log.h>
+
+#include <xf86drm.h>
+#include <xf86drmMode.h>
+#include <drm/drm_fourcc.h>
+
+#include <hardware/hardware.h>
+#include <hardware/hwcomposer.h>
+
+#include <gralloc_drm.h>
+#include <gralloc_drm_priv.h>
+#include <gralloc_drm_handle.h>
+
+#define ARRAY_SIZE(arr) (int)(sizeof(arr) / sizeof((arr)[0]))
+
+#define HWCOMPOSER_DRM_DEVICE "/dev/dri/card0"
+#define MAX_NUM_DISPLAYS 3
+#define UM_PER_INCH 25400
+
+static const uint32_t panel_types[] = {
+ DRM_MODE_CONNECTOR_LVDS,
+ DRM_MODE_CONNECTOR_eDP,
+ DRM_MODE_CONNECTOR_DSI,
+};
+
+struct hwc_drm_display {
+ uint32_t connector_id;
+
+ drmModeModeInfoPtr configs;
+ uint32_t num_configs;
+
+ int active_config;
+ uint32_t active_crtc;
+};
+
+struct hwc_context_t {
+ hwc_composer_device_1_t device;
+
+ int fd;
+ struct drm_module_t *gralloc_module; /* TODO: NUKE THIS */
+
+ hwc_procs_t const *procs;
+
+ struct hwc_drm_display displays[MAX_NUM_DISPLAYS];
+ int num_displays;
+};
+
+static int hwc_get_drm_display(struct hwc_context_t *ctx, int display,
+ struct hwc_drm_display **hd)
+{
+ if (display >= MAX_NUM_DISPLAYS) {
+ ALOGE("Requested display is out-of-bounds %d %d", display,
+ MAX_NUM_DISPLAYS);
+ return -EINVAL;
+ }
+ *hd = &ctx->displays[display];
+ return 0;
+}
+
+static int hwc_prepare_layer(hwc_layer_1_t *layer)
+{
+ /* TODO: We can't handle background right now, defer to sufaceFlinger */
+ if (layer->compositionType == HWC_BACKGROUND) {
+ layer->compositionType = HWC_FRAMEBUFFER;
+ ALOGV("Can't handle background layers yet");
+
+ /* TODO: Support sideband compositions */
+ } else if (layer->compositionType == HWC_SIDEBAND) {
+ layer->compositionType = HWC_FRAMEBUFFER;
+ ALOGV("Can't handle sideband content yet");
+ }
+
+ layer->hints = 0;
+
+ /* TODO: Handle cursor by setting compositionType=HWC_CURSOR_OVERLAY */
+ if (layer->flags & HWC_IS_CURSOR_LAYER) {
+ ALOGV("Can't handle async cursors yet");
+ }
+
+ /* TODO: Handle transformations */
+ if (layer->transform) {
+ ALOGV("Can't handle transformations yet");
+ }
+
+ /* TODO: Handle blending & plane alpha*/
+ if (layer->blending == HWC_BLENDING_PREMULT ||
+ layer->blending == HWC_BLENDING_COVERAGE) {
+ ALOGV("Can't handle blending yet");
+ }
+
+ /* TODO: Handle cropping & scaling */
+
+ return 0;
+}
+
+static int hwc_prepare(hwc_composer_device_1_t */* dev */, size_t num_displays,
+ hwc_display_contents_1_t** display_contents)
+{
+ int ret = 0, i, j;
+
+ /* TODO: Check flags for HWC_GEOMETRY_CHANGED */
+
+ for (i = 0; i < (int)num_displays && i < MAX_NUM_DISPLAYS; i++) {
+ for (j = 0; j < (int)display_contents[i]->numHwLayers; j++) {
+ ret = hwc_prepare_layer(
+ &display_contents[i]->hwLayers[j]);
+ if (ret) {
+ ALOGE("Failed to prepare layer %d:%d", j, i);
+ return ret;
+ }
+ }
+ }
+
+ return ret;
+}
+
+static int hwc_bo_add_fb(hwc_context_t */* ctx */, struct gralloc_drm_bo_t *bo)
+{
+ uint32_t pitches[4] = { 0, 0, 0, 0 };
+ uint32_t handles[4] = { 0, 0, 0, 0 };
+ uint32_t offsets[4] = { 0, 0, 0, 0 };
+ int drm_format;
+
+ pitches[0] = bo->handle->stride;
+ handles[0] = bo->fb_handle;
+
+ switch(bo->handle->format) {
+ case HAL_PIXEL_FORMAT_RGB_888:
+ drm_format = DRM_FORMAT_BGR888;
+ break;
+ case HAL_PIXEL_FORMAT_BGRA_8888:
+ drm_format = DRM_FORMAT_ARGB8888;
+ break;
+ case HAL_PIXEL_FORMAT_RGBX_8888:
+ drm_format = DRM_FORMAT_XBGR8888;
+ break;
+ case HAL_PIXEL_FORMAT_RGBA_8888:
+ drm_format = DRM_FORMAT_ABGR8888;
+ break;
+ case HAL_PIXEL_FORMAT_RGB_565:
+ drm_format = DRM_FORMAT_BGR565;
+ break;
+ case HAL_PIXEL_FORMAT_YV12:
+ drm_format = DRM_FORMAT_YVU420;
+ break;
+ default:
+ ALOGE("error resolving drm format");
+ return -EINVAL;
+ }
+
+ return drmModeAddFB2(bo->drm->fd, bo->handle->width, bo->handle->height,
+ drm_format, handles, pitches, offsets, (uint32_t *) &bo->fb_id,
+ 0);
+}
+
+static bool hwc_mode_is_equal(drmModeModeInfoPtr a, drmModeModeInfoPtr b)
+{
+ return a->clock == b->clock &&
+ a->hdisplay == b->hdisplay &&
+ a->hsync_start == b->hsync_start &&
+ a->hsync_end == b->hsync_end &&
+ a->htotal == b->htotal &&
+ a->hskew == b->hskew &&
+ a->vdisplay == b->vdisplay &&
+ a->vsync_start == b->vsync_start &&
+ a->vsync_end == b->vsync_end &&
+ a->vtotal == b->vtotal &&
+ a->vscan == b->vscan &&
+ a->vrefresh == b->vrefresh &&
+ a->flags == b->flags &&
+ a->type == b->type &&
+ !strcmp(a->name, b->name);
+}
+
+static int hwc_set_display(hwc_context_t *ctx, int display,
+ hwc_display_contents_1_t* display_contents)
+{
+ struct hwc_drm_display *hd = NULL;
+ drmModeCrtcPtr crtc;
+ drmModeModeInfoPtr m;
+ hwc_layer_1_t *layer = NULL;
+ int ret, i;
+
+ /* TODO: NUKE THIS */
+ gralloc_drm_t *drm = ctx->gralloc_module->drm;
+ gralloc_drm_handle_t *gr_handle;
+ struct gralloc_drm_bo_t *bo;
+
+ ret = hwc_get_drm_display(ctx, display, &hd);
+ if (ret)
+ return ret;
+
+ if (!hd->active_crtc) {
+ ALOGE("There is no active crtc for display %d", display);
+ return -ENOENT;
+ }
+
+ /*
+ * TODO: We can only support one hw layer atm, so choose either the
+ * first one or the framebuffer target.
+ */
+ if (!display_contents->numHwLayers) {
+ return 0;
+ } else if (display_contents->numHwLayers == 1) {
+ layer = &display_contents->hwLayers[0];
+ } else {
+ for (i = 0; i < (int)display_contents->numHwLayers; i++) {
+ layer = &display_contents->hwLayers[i];
+ if (layer->compositionType == HWC_FRAMEBUFFER_TARGET)
+ break;
+ }
+ if (i == (int)display_contents->numHwLayers) {
+ ALOGE("Could not find a suitable layer for display %d",
+ display);
+ }
+ }
+
+ gr_handle = (gralloc_drm_handle_t *)layer->handle;
+
+ bo = gr_handle->data;
+ if (!bo) {
+ ALOGE("Could not get drm bo from handle");
+ return -EINVAL;
+ }
+
+ if (!bo->fb_id) {
+ ret = hwc_bo_add_fb(ctx, bo);
+ if (ret) {
+ ALOGE("could not create drm fb %d", ret);
+ return ret;
+ }
+ }
+
+ crtc = drmModeGetCrtc(ctx->fd, hd->active_crtc);
+ if (!crtc) {
+ ALOGE("Failed to get crtc for display %d", display);
+ return -ENODEV;
+ }
+
+ m = &hd->configs[hd->active_config];
+
+ /* Do a modeset if we haven't done one, or the mode has changed */
+ if (!crtc->mode_valid || !hwc_mode_is_equal(m, &crtc->mode)) {
+ ret = drmModeSetCrtc(ctx->fd, crtc->crtc_id, bo->fb_id, 0, 0,
+ &hd->connector_id, 1, m);
+ if (ret) {
+ ALOGE("Modeset failed for crtc %d", crtc->crtc_id);
+ goto out;
+ }
+ goto out;
+ }
+
+ ret = drmModePageFlip(ctx->fd, crtc->crtc_id, bo->fb_id, 0, 0);
+ if (ret) {
+ ALOGE("Failed to flip buffer for crtc %d", crtc->crtc_id);
+ goto out;
+ }
+
+out:
+ drmModeFreeCrtc(crtc);
+ return ret;
+}
+
+static int hwc_set(hwc_composer_device_1_t *dev, size_t num_displays,
+ hwc_display_contents_1_t** display_contents)
+{
+ struct hwc_context_t *ctx = (struct hwc_context_t *)&dev->common;
+ int ret = 0, i;
+
+ /* TODO: Handle acquire & release fences */
+
+ for (i = 0; i < (int)num_displays && i < MAX_NUM_DISPLAYS; i++) {
+ display_contents[i]->retireFenceFd = -1; /* TODO: sync */
+
+ ret = hwc_set_display(ctx, i, display_contents[i]);
+ }
+
+ return ret;
+}
+
+static int hwc_event_control(struct hwc_composer_device_1 */* dev */,
+ int /* display */, int /* event */, int /* enabled */)
+{
+ int ret;
+
+ /* TODO */
+ return 0;
+}
+
+static int hwc_set_power_mode(struct hwc_composer_device_1* dev, int display,
+ int mode)
+{
+ struct hwc_context_t *ctx = (struct hwc_context_t *)&dev->common;
+ struct hwc_drm_display *hd = NULL;
+ drmModeConnectorPtr c;
+ int ret, i;
+ uint32_t dpms_prop = 0;
+ uint64_t dpms_value = 0;
+
+ ret = hwc_get_drm_display(ctx, display, &hd);
+ if (ret)
+ return ret;
+
+ c = drmModeGetConnector(ctx->fd, hd->connector_id);
+ if (!c) {
+ ALOGE("Failed to get connector %d", display);
+ return -ENODEV;
+ }
+
+ for (i = 0; !dpms_prop && i < c->count_props; i++) {
+ drmModePropertyPtr p;
+
+ p = drmModeGetProperty(ctx->fd, c->props[i]);
+ if (!p)
+ continue;
+
+ if (!strcmp(p->name, "DPMS"))
+ dpms_prop = c->props[i];
+
+ drmModeFreeProperty(p);
+ }
+ if (!dpms_prop) {
+ ALOGE("Failed to get DPMS property from display %d", display);
+ ret = -ENOENT;
+ goto out;
+ }
+
+ switch(mode) {
+ case HWC_POWER_MODE_OFF:
+ dpms_value = DRM_MODE_DPMS_OFF;
+ break;
+
+ /* We can't support dozing right now, so go full on */
+ case HWC_POWER_MODE_DOZE:
+ case HWC_POWER_MODE_DOZE_SUSPEND:
+ case HWC_POWER_MODE_NORMAL:
+ dpms_value = DRM_MODE_DPMS_ON;
+ break;
+ };
+
+ ret = drmModeConnectorSetProperty(ctx->fd, c->connector_id,
+ dpms_prop, dpms_value);
+ if (ret) {
+ ALOGE("Failed to set DPMS property for display %d", display);
+ goto out;
+ }
+
+out:
+ drmModeFreeConnector(c);
+ return ret;
+}
+
+static int hwc_query(struct hwc_composer_device_1 */* dev */, int what,
+ int *value)
+{
+ switch(what) {
+ case HWC_BACKGROUND_LAYER_SUPPORTED:
+ *value = 0; /* TODO: We should do this */
+ break;
+ case HWC_VSYNC_PERIOD:
+ ALOGW("Query for deprecated vsync value, returning 60Hz");
+ *value = 1000 * 1000 * 1000 / 60;
+ break;
+ case HWC_DISPLAY_TYPES_SUPPORTED:
+ *value = HWC_DISPLAY_PRIMARY | HWC_DISPLAY_EXTERNAL;
+ break;
+ }
+ return 0;
+}
+
+static void hwc_register_procs(struct hwc_composer_device_1* dev,
+ hwc_procs_t const* procs)
+{
+ struct hwc_context_t *ctx = (struct hwc_context_t *)&dev->common;
+
+ ctx->procs = procs;
+}
+
+static int hwc_get_display_configs(struct hwc_composer_device_1* dev,
+ int display, uint32_t* configs, size_t* numConfigs)
+{
+ struct hwc_context_t *ctx = (struct hwc_context_t *)&dev->common;
+ struct hwc_drm_display *hd = NULL;
+ drmModeConnectorPtr c;
+ int ret = 0, i;
+
+ if (!*numConfigs)
+ return 0;
+
+ ret = hwc_get_drm_display(ctx, display, &hd);
+ if (ret)
+ return ret;
+
+ c = drmModeGetConnector(ctx->fd, hd->connector_id);
+ if (!c) {
+ ALOGE("Failed to get connector %d", display);
+ return -ENODEV;
+ }
+
+ if (hd->configs)
+ free(hd->configs);
+
+ hd->active_config = -1;
+ hd->configs = (drmModeModeInfoPtr)calloc(c->count_modes,
+ sizeof(*hd->configs));
+ if (!hd->configs) {
+ ALOGE("Failed to allocate config list for display %d", display);
+ ret = -ENOMEM;
+ hd->num_configs = 0;
+ goto out;
+ }
+
+ for (i = 0; i < c->count_modes; i++) {
+ drmModeModeInfoPtr m = &hd->configs[i];
+
+ memcpy(m, &c->modes[i], sizeof(*m));
+
+ if (i < (int)*numConfigs)
+ configs[i] = i;
+ }
+
+ hd->num_configs = c->count_modes;
+ *numConfigs = MIN(c->count_modes, *numConfigs);
+
+out:
+ drmModeFreeConnector(c);
+ return ret;
+}
+
+static int hwc_check_config_valid(struct hwc_context_t *ctx,
+ drmModeConnectorPtr connector, int display,
+ int config_idx)
+{
+ struct hwc_drm_display *hd = NULL;
+ drmModeModeInfoPtr m = NULL;
+ int ret = 0, i;
+
+ ret = hwc_get_drm_display(ctx, display, &hd);
+ if (ret)
+ return ret;
+
+ /* Make sure the requested config is still valid for the display */
+ for (i = 0; i < connector->count_modes; i++) {
+ if (hwc_mode_is_equal(&connector->modes[i],
+ &hd->configs[config_idx])) {
+ m = &hd->configs[config_idx];
+ break;
+ }
+ }
+ if (!m)
+ return -ENOENT;
+
+ return 0;
+}
+
+static int hwc_get_display_attributes(struct hwc_composer_device_1* dev,
+ int display, uint32_t config, const uint32_t* attributes,
+ int32_t* values)
+{
+ struct hwc_context_t *ctx = (struct hwc_context_t *)&dev->common;
+ struct hwc_drm_display *hd = NULL;
+ drmModeConnectorPtr c;
+ drmModeModeInfoPtr m;
+ int ret, i;
+
+ ret = hwc_get_drm_display(ctx, display, &hd);
+ if (ret)
+ return ret;
+
+ if (config >= hd->num_configs) {
+ ALOGE("Requested config is out-of-bounds %d %d", config,
+ hd->num_configs);
+ return -EINVAL;
+ }
+
+ c = drmModeGetConnector(ctx->fd, hd->connector_id);
+ if (!c) {
+ ALOGE("Failed to get connector %d", display);
+ return -ENODEV;
+ }
+
+ ret = hwc_check_config_valid(ctx, c, display, (int)config);
+ if (ret) {
+ ALOGE("Provided config is no longer valid %u", config);
+ goto out;
+ }
+
+ m = &hd->configs[config];
+ for (i = 0; attributes[i] != HWC_DISPLAY_NO_ATTRIBUTE; i++) {
+ switch(attributes[i]) {
+ case HWC_DISPLAY_VSYNC_PERIOD:
+ values[i] = 1000 * 1000 * 1000 / m->vrefresh;
+ break;
+ case HWC_DISPLAY_WIDTH:
+ values[i] = m->hdisplay;
+ break;
+ case HWC_DISPLAY_HEIGHT:
+ values[i] = m->vdisplay;
+ break;
+ case HWC_DISPLAY_DPI_X:
+ /* Dots per 1000 inches */
+ values[i] = c->mmWidth ?
+ (m->hdisplay * UM_PER_INCH) / c->mmWidth : 0;
+ break;
+ case HWC_DISPLAY_DPI_Y:
+ /* Dots per 1000 inches */
+ values[i] = c->mmHeight ?
+ (m->vdisplay * UM_PER_INCH) / c->mmHeight : 0;
+ break;
+ }
+ }
+
+out:
+ drmModeFreeConnector(c);
+ return ret;
+}
+
+static int hwc_get_active_config(struct hwc_composer_device_1* dev, int display)
+{
+ struct hwc_context_t *ctx = (struct hwc_context_t *)&dev->common;
+ struct hwc_drm_display *hd = NULL;
+ drmModeConnectorPtr c;
+ int ret;
+
+ ret = hwc_get_drm_display(ctx, display, &hd);
+ if (ret)
+ return ret;
+
+ if (hd->active_config < 0)
+ return -1;
+
+ c = drmModeGetConnector(ctx->fd, hd->connector_id);
+ if (!c) {
+ ALOGE("Failed to get connector %d", display);
+ return -ENODEV;
+ }
+
+ ret = hwc_check_config_valid(ctx, c, display, hd->active_config);
+ if (ret) {
+ ALOGE("Config is no longer valid %d", hd->active_config);
+ ret = -1;
+ goto out;
+ }
+
+ ret = hd->active_config;
+
+out:
+ drmModeFreeConnector(c);
+ return ret;
+}
+
+static bool hwc_crtc_is_bound(struct hwc_context_t *ctx, uint32_t crtc_id)
+{
+ int i;
+
+ for (i = 0; i < MAX_NUM_DISPLAYS; i++) {
+ if (ctx->displays[i].active_crtc == crtc_id)
+ return true;
+ }
+ return false;
+}
+
+static int hwc_try_encoder(struct hwc_context_t *ctx, drmModeResPtr r,
+ uint32_t encoder_id, uint32_t *crtc_id)
+{
+ drmModeEncoderPtr e;
+ int ret, i;
+
+ e = drmModeGetEncoder(ctx->fd, encoder_id);
+ if (!e) {
+ ALOGE("Failed to get encoder for connector %d", encoder_id);
+ return -ENODEV;
+ }
+
+ /* First try to use the currently-bound crtc */
+ if (e->crtc_id) {
+ if (!hwc_crtc_is_bound(ctx, e->crtc_id)) {
+ *crtc_id = e->crtc_id;
+ ret = 0;
+ goto out;
+ }
+ }
+
+ /* Try to find a possible crtc which will work */
+ for (i = 0; i < r->count_crtcs; i++) {
+ if (!(e->possible_crtcs & (1 << i)))
+ continue;
+
+ /* We've already tried this earlier */
+ if (e->crtc_id == r->crtcs[i])
+ continue;
+
+ if (!hwc_crtc_is_bound(ctx, r->crtcs[i])) {
+ *crtc_id = r->crtcs[i];
+ ret = 0;
+ goto out;
+ }
+ }
+
+ /* We can't use the encoder, but nothing went wrong, try another one */
+ ret = -EAGAIN;
+
+out:
+ drmModeFreeEncoder(e);
+ return ret;
+}
+
+static int hwc_set_active_config(struct hwc_composer_device_1* dev, int display,
+ int index)
+{
+ struct hwc_context_t *ctx = (struct hwc_context_t *)&dev->common;
+ struct hwc_drm_display *hd = NULL;
+ drmModeResPtr r = NULL;
+ drmModeConnectorPtr c;
+ uint32_t crtc_id = 0;
+ int ret, i;
+ bool new_crtc, new_encoder;
+
+ ret = hwc_get_drm_display(ctx, display, &hd);
+ if (ret)
+ return ret;
+
+ c = drmModeGetConnector(ctx->fd, hd->connector_id);
+ if (!c) {
+ ALOGE("Failed to get connector %d", display);
+ return -ENODEV;
+ }
+
+ if (c->connection == DRM_MODE_DISCONNECTED) {
+ ALOGE("Tried to configure a disconnected display %d", display);
+ ret = -ENODEV;
+ goto out;
+ }
+
+ ret = hwc_check_config_valid(ctx, c, display, index);
+ if (ret) {
+ ALOGE("Provided config is no longer valid %u", index);
+ ret = -ENOENT;
+ goto out;
+ }
+
+ r = drmModeGetResources(ctx->fd);
+ if (!r) {
+ ALOGE("Failed to get drm resources");
+ goto out;
+ }
+
+ /* We no longer have an active_crtc */
+ hd->active_crtc = 0;
+
+ /* First, try to use the currently-connected encoder */
+ if (c->encoder_id) {
+ ret = hwc_try_encoder(ctx, r, c->encoder_id, &crtc_id);
+ if (ret && ret != -EAGAIN) {
+ ALOGE("Encoder try failed %d", ret);
+ goto out;
+ }
+ }
+
+ /* We couldn't find a crtc with the attached encoder, try the others */
+ if (!crtc_id) {
+ for (i = 0; i < c->count_encoders; i++) {
+ ret = hwc_try_encoder(ctx, r, c->encoders[i], &crtc_id);
+ if (!ret) {
+ break;
+ } else if (ret != -EAGAIN) {
+ ALOGE("Encoder try failed %d", ret);
+ goto out;
+ }
+ }
+ if (!crtc_id) {
+ ALOGE("Couldn't find valid crtc to modeset");
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ hd->active_crtc = crtc_id;
+ hd->active_config = index;
+
+ /* TODO: Once we have atomic, set the crtc timing info here */
+
+out:
+ if (r)
+ drmModeFreeResources(r);
+
+ drmModeFreeConnector(c);
+ return ret;
+}
+
+static int hwc_device_close(struct hw_device_t *dev)
+{
+ struct hwc_context_t *ctx = (struct hwc_context_t *)dev;
+
+ free(ctx);
+
+ return 0;
+}
+
+static int hwc_initialize_display(struct hwc_context_t *ctx, int display,
+ uint32_t connector_id)
+{
+ struct hwc_drm_display *hd = NULL;
+ int ret;
+
+ ret = hwc_get_drm_display(ctx, display, &hd);
+ if (ret)
+ return ret;
+
+ hd->active_config = -1;
+ hd->connector_id = connector_id;
+
+ return 0;
+}
+
+static int hwc_enumerate_displays(struct hwc_context_t *ctx)
+{
+ struct hwc_drm_display *panel_hd;
+ drmModeResPtr res;
+ drmModeConnectorPtr *conn_list;
+ int ret = 0, i, j;
+
+ res = drmModeGetResources(ctx->fd);
+ if (!res) {
+ ALOGE("Failed to get drm resources");
+ return -ENODEV;
+ }
+
+ conn_list = (drmModeConnector **)calloc(res->count_connectors,
+ sizeof(*conn_list));
+ if (!conn_list) {
+ ALOGE("Failed to allocate connector list");
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ for (i = 0; i < res->count_connectors; i++) {
+ conn_list[i] = drmModeGetConnector(ctx->fd, res->connectors[i]);
+ if (!conn_list[i]) {
+ ALOGE("Failed to get connector %d", res->connectors[i]);
+ ret = -ENODEV;
+ goto out;
+ }
+ }
+
+ ctx->num_displays = 0;
+
+ /* Find a connected, panel type connector for display 0 */
+ for (i = 0; i < res->count_connectors; i++) {
+ drmModeConnectorPtr c = conn_list[i];
+
+ for (j = 0; j < ARRAY_SIZE(panel_types); j++) {
+ if (c->connector_type == panel_types[j] &&
+ c->connection == DRM_MODE_CONNECTED)
+ break;
+ }
+ if (j == ARRAY_SIZE(panel_types))
+ continue;
+
+ hwc_initialize_display(ctx, ctx->num_displays, c->connector_id);
+ ctx->num_displays++;
+ break;
+ }
+
+ ret = hwc_get_drm_display(ctx, 0, &panel_hd);
+ if (ret)
+ goto out;
+
+ /* Fill in the other displays */
+ for (i = 0; i < res->count_connectors; i++) {
+ drmModeConnectorPtr c = conn_list[i];
+
+ if (panel_hd->connector_id == c->connector_id)
+ continue;
+
+ hwc_initialize_display(ctx, ctx->num_displays, c->connector_id);
+ ctx->num_displays++;
+ }
+
+out:
+ for (i = 0; i < res->count_connectors; i++) {
+ if (conn_list[i])
+ drmModeFreeConnector(conn_list[i]);
+ }
+ free(conn_list);
+
+ if (res)
+ drmModeFreeResources(res);
+
+ return ret;
+}
+
+static int hwc_device_open(const struct hw_module_t* module, const char* name,
+ struct hw_device_t** dev)
+{
+ int ret = 0;
+ struct hwc_context_t *ctx;
+
+ if (strcmp(name, HWC_HARDWARE_COMPOSER)) {
+ ALOGE("Invalid module name- %s", name);
+ return -EINVAL;
+ }
+
+ ctx = (hwc_context_t *)calloc(1, sizeof(*ctx));
+ if (!ctx) {
+ ALOGE("Failed to allocate hwc context");
+ return -ENOMEM;
+ }
+
+ /* TODO: NUKE THIS */
+ ret = hw_get_module(GRALLOC_HARDWARE_MODULE_ID,
+ (const hw_module_t **)&ctx->gralloc_module);
+ if (ret) {
+ ALOGE("Failed to open gralloc module");
+ goto out;
+ }
+
+ /* TODO: Use drmOpenControl here instead */
+ ctx->fd = open(HWCOMPOSER_DRM_DEVICE, O_RDWR);
+ if (ctx->fd < 0) {
+ ALOGE("Failed to open dri- %s", strerror(-errno));
+ goto out;
+ }
+
+ ret = drmSetMaster(ctx->fd);
+ if (ret) {
+ ALOGE("Failed to set hwcomposer as drm master %d", ret);
+ goto out;
+ }
+
+ ret = hwc_enumerate_displays(ctx);
+ if (ret) {
+ ALOGE("Failed to enumerate displays: %s", strerror(ret));
+ goto out;
+ }
+
+ ctx->device.common.tag = HARDWARE_DEVICE_TAG;
+ ctx->device.common.version = HWC_DEVICE_API_VERSION_1_4;
+ ctx->device.common.module = const_cast<hw_module_t*>(module);
+ ctx->device.common.close = hwc_device_close;
+
+ ctx->device.prepare = hwc_prepare;
+ ctx->device.set = hwc_set;
+ ctx->device.eventControl = hwc_event_control;
+ ctx->device.setPowerMode = hwc_set_power_mode;
+ ctx->device.query = hwc_query;
+ ctx->device.registerProcs = hwc_register_procs;
+ ctx->device.getDisplayConfigs = hwc_get_display_configs;
+ ctx->device.getDisplayAttributes = hwc_get_display_attributes;
+ ctx->device.getActiveConfig = hwc_get_active_config;
+ ctx->device.setActiveConfig = hwc_set_active_config;
+ ctx->device.setCursorPositionAsync = NULL; /* TODO: Add cursor */
+
+ *dev = &ctx->device.common;
+
+ return 0;
+out:
+ if (ctx->fd >= 0)
+ close(ctx->fd);
+
+ free(ctx);
+ return ret;
+}
+
+static struct hw_module_methods_t hwc_module_methods = {
+ open: hwc_device_open
+};
+
+hwc_module_t HAL_MODULE_INFO_SYM = {
+ common: {
+ tag: HARDWARE_MODULE_TAG,
+ version_major: 1,
+ version_minor: 0,
+ id: HWC_HARDWARE_MODULE_ID,
+ name: "DRM hwcomposer module",
+ author: "The Android Open Source Project",
+ methods: &hwc_module_methods,
+ dso: NULL,
+ reserved: { 0 },
+ }
+};