Add drm support to minui (1a92c445) · Commits · e / tools / etwrp

minui/Android.mk

+2 −0

Original line number	Diff line number	Diff line
		@@ -5,10 +5,12 @@ LOCAL_SRC_FILES := \
		events.cpp \
		graphics.cpp \
		graphics_adf.cpp \
		graphics_drm.cpp \
		graphics_fbdev.cpp \
		resources.cpp \

		LOCAL_WHOLE_STATIC_LIBRARIES += libadf
		LOCAL_WHOLE_STATIC_LIBRARIES += libdrm
		LOCAL_STATIC_LIBRARIES += libpng

		LOCAL_MODULE := libminui

minui/graphics.cpp

+5 −0

Original line number	Diff line number	Diff line
		@@ -368,6 +368,11 @@ int gr_init(void)
		}
		}

		if (!gr_draw) {
		gr_backend = open_drm();
		gr_draw = gr_backend->init(gr_backend);
		}

		if (!gr_draw) {
		gr_backend = open_fbdev();
		gr_draw = gr_backend->init(gr_backend);

minui/graphics.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -38,5 +38,6 @@ struct minui_backend {

		minui_backend* open_fbdev();
		minui_backend* open_adf();
		minui_backend* open_drm();

		#endif

minui/graphics_drm.cpp

0 → 100644

+476 −0

Original line number	Diff line number	Diff line
		/*
		* 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.
		*/

		#include <drm_fourcc.h>
		#include <fcntl.h>
		#include <stdbool.h>
		#include <stdio.h>
		#include <stdlib.h>
		#include <string.h>
		#include <sys/cdefs.h>
		#include <sys/ioctl.h>
		#include <sys/mman.h>
		#include <sys/types.h>
		#include <unistd.h>
		#include <xf86drm.h>
		#include <xf86drmMode.h>

		#include "minui.h"
		#include "graphics.h"

		#define ARRAY_SIZE(A) (sizeof(A)/sizeof(*(A)))

		struct drm_surface {
		GRSurface base;
		uint32_t fb_id;
		uint32_t handle;
		};

		static drm_surface *drm_surfaces[2];
		static int current_buffer;

		static drmModeCrtc *main_monitor_crtc;
		static drmModeConnector *main_monitor_connector;

		static int drm_fd = -1;

		static void drm_disable_crtc(int drm_fd, drmModeCrtc *crtc) {
		if (crtc) {
		drmModeSetCrtc(drm_fd, crtc->crtc_id,
		0, // fb_id
		0, 0, // x,y
		NULL, // connectors
		0, // connector_count
		NULL); // mode
		}
		}

		static void drm_enable_crtc(int drm_fd, drmModeCrtc *crtc,
		struct drm_surface *surface) {
		int32_t ret;

		ret = drmModeSetCrtc(drm_fd, crtc->crtc_id,
		surface->fb_id,
		0, 0, // x,y
		&main_monitor_connector->connector_id,
		1, // connector_count
		&main_monitor_crtc->mode);

		if (ret)
		printf("drmModeSetCrtc failed ret=%d\n", ret);
		}

		static void drm_blank(minui_backend* backend __unused, bool blank) {
		if (blank)
		drm_disable_crtc(drm_fd, main_monitor_crtc);
		else
		drm_enable_crtc(drm_fd, main_monitor_crtc,
		drm_surfaces[current_buffer]);
		}

		static void drm_destroy_surface(struct drm_surface *surface) {
		struct drm_gem_close gem_close;
		int ret;

		if(!surface)
		return;

		if (surface->base.data)
		munmap(surface->base.data,
		surface->base.row_bytes * surface->base.height);

		if (surface->fb_id) {
		ret = drmModeRmFB(drm_fd, surface->fb_id);
		if (ret)
		printf("drmModeRmFB failed ret=%d\n", ret);
		}

		if (surface->handle) {
		memset(&gem_close, 0, sizeof(gem_close));
		gem_close.handle = surface->handle;

		ret = drmIoctl(drm_fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
		if (ret)
		printf("DRM_IOCTL_GEM_CLOSE failed ret=%d\n", ret);
		}

		free(surface);
		}

		static int drm_format_to_bpp(uint32_t format) {
		switch(format) {
		case DRM_FORMAT_ABGR8888:
		case DRM_FORMAT_BGRA8888:
		case DRM_FORMAT_RGBX8888:
		case DRM_FORMAT_BGRX8888:
		case DRM_FORMAT_XBGR8888:
		case DRM_FORMAT_XRGB8888:
		return 32;
		case DRM_FORMAT_RGB565:
		return 16;
		default:
		printf("Unknown format %d\n", format);
		return 32;
		}
		}

		static drm_surface *drm_create_surface(int width, int height) {
		struct drm_surface *surface;
		struct drm_mode_create_dumb create_dumb;
		uint32_t format;
		int ret;

		surface = (struct drm_surface)calloc(1, sizeof(surface));
		if (!surface) {
		printf("Can't allocate memory\n");
		return NULL;
		}

		#if defined(RECOVERY_ABGR)
		format = DRM_FORMAT_RGBA8888;
		#elif defined(RECOVERY_BGRA)
		format = DRM_FORMAT_ARGB8888;
		#elif defined(RECOVERY_RGBX)
		format = DRM_FORMAT_XBGR8888;
		#else
		format = DRM_FORMAT_RGB565;
		#endif

		memset(&create_dumb, 0, sizeof(create_dumb));
		create_dumb.height = height;
		create_dumb.width = width;
		create_dumb.bpp = drm_format_to_bpp(format);
		create_dumb.flags = 0;

		ret = drmIoctl(drm_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
		if (ret) {
		printf("DRM_IOCTL_MODE_CREATE_DUMB failed ret=%d\n",ret);
		drm_destroy_surface(surface);
		return NULL;
		}
		surface->handle = create_dumb.handle;

		uint32_t handles[4], pitches[4], offsets[4];

		handles[0] = surface->handle;
		pitches[0] = create_dumb.pitch;
		offsets[0] = 0;

		ret = drmModeAddFB2(drm_fd, width, height,
		format, handles, pitches, offsets,
		&(surface->fb_id), 0);
		if (ret) {
		printf("drmModeAddFB2 failed ret=%d\n", ret);
		drm_destroy_surface(surface);
		return NULL;
		}

		struct drm_mode_map_dumb map_dumb;
		memset(&map_dumb, 0, sizeof(map_dumb));
		map_dumb.handle = create_dumb.handle;
		ret = drmIoctl(drm_fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb);
		if (ret) {
		printf("DRM_IOCTL_MODE_MAP_DUMB failed ret=%d\n",ret);
		drm_destroy_surface(surface);
		return NULL;;
		}

		surface->base.height = height;
		surface->base.width = width;
		surface->base.row_bytes = create_dumb.pitch;
		surface->base.pixel_bytes = create_dumb.bpp / 8;
		surface->base.data = (unsigned char*)
		mmap(NULL,
		surface->base.height * surface->base.row_bytes,
		PROT_READ \| PROT_WRITE, MAP_SHARED,
		drm_fd, map_dumb.offset);
		if (surface->base.data == MAP_FAILED) {
		perror("mmap() failed");
		drm_destroy_surface(surface);
		return NULL;
		}

		return surface;
		}

		static drmModeCrtc *find_crtc_for_connector(int fd,
		drmModeRes *resources,
		drmModeConnector *connector) {
		int i, j;
		drmModeEncoder *encoder;
		int32_t crtc;

		/*
		* Find the encoder. If we already have one, just use it.
		*/
		if (connector->encoder_id)
		encoder = drmModeGetEncoder(fd, connector->encoder_id);
		else
		encoder = NULL;

		if (encoder && encoder->crtc_id) {
		crtc = encoder->crtc_id;
		drmModeFreeEncoder(encoder);
		return drmModeGetCrtc(fd, crtc);
		}

		/*
		* Didn't find anything, try to find a crtc and encoder combo.
		*/
		crtc = -1;
		for (i = 0; i < connector->count_encoders; i++) {
		encoder = drmModeGetEncoder(fd, connector->encoders[i]);

		if (encoder) {
		for (j = 0; j < resources->count_crtcs; j++) {
		if (!(encoder->possible_crtcs & (1 << j)))
		continue;
		crtc = resources->crtcs[j];
		break;
		}
		if (crtc >= 0) {
		drmModeFreeEncoder(encoder);
		return drmModeGetCrtc(fd, crtc);
		}
		}
		}

		return NULL;
		}

		static drmModeConnector *find_used_connector_by_type(int fd,
		drmModeRes *resources,
		unsigned type) {
		int i;
		for (i = 0; i < resources->count_connectors; i++) {
		drmModeConnector *connector;

		connector = drmModeGetConnector(fd, resources->connectors[i]);
		if (connector) {
		if ((connector->connector_type == type) &&
		(connector->connection == DRM_MODE_CONNECTED) &&
		(connector->count_modes > 0))
		return connector;

		drmModeFreeConnector(connector);
		}
		}
		return NULL;
		}

		static drmModeConnector *find_first_connected_connector(int fd,
		drmModeRes *resources) {
		int i;
		for (i = 0; i < resources->count_connectors; i++) {
		drmModeConnector *connector;

		connector = drmModeGetConnector(fd, resources->connectors[i]);
		if (connector) {
		if ((connector->count_modes > 0) &&
		(connector->connection == DRM_MODE_CONNECTED))
		return connector;

		drmModeFreeConnector(connector);
		}
		}
		return NULL;
		}

		static drmModeConnector find_main_monitor(int fd, drmModeRes resources,
		uint32_t *mode_index) {
		unsigned i = 0;
		int modes;
		/* Look for LVDS/eDP/DSI connectors. Those are the main screens. */
		unsigned kConnectorPriority[] = {
		DRM_MODE_CONNECTOR_LVDS,
		DRM_MODE_CONNECTOR_eDP,
		DRM_MODE_CONNECTOR_DSI,
		};

		drmModeConnector *main_monitor_connector = NULL;
		do {
		main_monitor_connector = find_used_connector_by_type(fd,
		resources,
		kConnectorPriority[i]);
		i++;
		} while (!main_monitor_connector && i < ARRAY_SIZE(kConnectorPriority));

		/* If we didn't find a connector, grab the first one that is connected. */
		if (!main_monitor_connector)
		main_monitor_connector =
		find_first_connected_connector(fd, resources);

		/* If we still didn't find a connector, give up and return. */
		if (!main_monitor_connector)
		return NULL;

		*mode_index = 0;
		for (modes = 0; modes < main_monitor_connector->count_modes; modes++) {
		if (main_monitor_connector->modes[modes].type &
		DRM_MODE_TYPE_PREFERRED) {
		*mode_index = modes;
		break;
		}
		}

		return main_monitor_connector;
		}

		static void disable_non_main_crtcs(int fd,
		drmModeRes *resources,
		drmModeCrtc* main_crtc) {
		int i;
		drmModeCrtc* crtc;

		for (i = 0; i < resources->count_connectors; i++) {
		drmModeConnector *connector;

		connector = drmModeGetConnector(fd, resources->connectors[i]);
		crtc = find_crtc_for_connector(fd, resources, connector);
		if (crtc->crtc_id != main_crtc->crtc_id)
		drm_disable_crtc(fd, crtc);
		drmModeFreeCrtc(crtc);
		}
		}

		static GRSurface* drm_init(minui_backend* backend __unused) {
		drmModeRes *res = NULL;
		uint32_t selected_mode;
		char *dev_name;
		int width, height;
		int ret, i;

		/* Consider DRM devices in order. */
		for (i = 0; i < DRM_MAX_MINOR; i++) {
		uint64_t cap = 0;

		ret = asprintf(&dev_name, DRM_DEV_NAME, DRM_DIR_NAME, i);
		if (ret < 0)
		continue;

		drm_fd = open(dev_name, O_RDWR, 0);
		free(dev_name);
		if (drm_fd < 0)
		continue;

		/* We need dumb buffers. */
		ret = drmGetCap(drm_fd, DRM_CAP_DUMB_BUFFER, &cap);
		if (ret \|\| cap == 0) {
		close(drm_fd);
		continue;
		}

		res = drmModeGetResources(drm_fd);
		if (!res) {
		close(drm_fd);
		continue;
		}

		/* Use this device if it has at least one connected monitor. */
		if (res->count_crtcs > 0 && res->count_connectors > 0)
		if (find_first_connected_connector(drm_fd, res))
		break;

		drmModeFreeResources(res);
		close(drm_fd);
		res = NULL;
		}

		if (drm_fd < 0 \|\| res == NULL) {
		perror("cannot find/open a drm device");
		return NULL;
		}

		main_monitor_connector = find_main_monitor(drm_fd,
		res, &selected_mode);

		if (!main_monitor_connector) {
		printf("main_monitor_connector not found\n");
		drmModeFreeResources(res);
		close(drm_fd);
		return NULL;
		}

		main_monitor_crtc = find_crtc_for_connector(drm_fd, res,
		main_monitor_connector);

		if (!main_monitor_crtc) {
		printf("main_monitor_crtc not found\n");
		drmModeFreeResources(res);
		close(drm_fd);
		return NULL;
		}

		disable_non_main_crtcs(drm_fd,
		res, main_monitor_crtc);

		main_monitor_crtc->mode = main_monitor_connector->modes[selected_mode];

		width = main_monitor_crtc->mode.hdisplay;
		height = main_monitor_crtc->mode.vdisplay;

		drmModeFreeResources(res);

		drm_surfaces[0] = drm_create_surface(width, height);
		drm_surfaces[1] = drm_create_surface(width, height);
		if (!drm_surfaces[0] \|\| !drm_surfaces[1]) {
		drm_destroy_surface(drm_surfaces[0]);
		drm_destroy_surface(drm_surfaces[1]);
		drmModeFreeResources(res);
		close(drm_fd);
		return NULL;
		}

		current_buffer = 0;

		drm_enable_crtc(drm_fd, main_monitor_crtc, drm_surfaces[1]);

		return &(drm_surfaces[0]->base);
		}

		static GRSurface* drm_flip(minui_backend* backend __unused) {
		int ret;

		ret = drmModePageFlip(drm_fd, main_monitor_crtc->crtc_id,
		drm_surfaces[current_buffer]->fb_id, 0, NULL);
		if (ret < 0) {
		printf("drmModePageFlip failed ret=%d\n", ret);
		return NULL;
		}
		current_buffer = 1 - current_buffer;
		return &(drm_surfaces[current_buffer]->base);
		}

		static void drm_exit(minui_backend* backend __unused) {
		drm_disable_crtc(drm_fd, main_monitor_crtc);
		drm_destroy_surface(drm_surfaces[0]);
		drm_destroy_surface(drm_surfaces[1]);
		drmModeFreeCrtc(main_monitor_crtc);
		drmModeFreeConnector(main_monitor_connector);
		close(drm_fd);
		drm_fd = -1;
		}

		static minui_backend drm_backend = {
		.init = drm_init,
		.flip = drm_flip,
		.blank = drm_blank,
		.exit = drm_exit,
		};

		minui_backend* open_drm() {
		return &drm_backend;
		}