tests/modetest/modetest.c - fp2-dev/platform/external/libdrm - Gitiles

 /*
  * DRM based mode setting test program
  * Copyright 2008 Tungsten Graphics
  *   Jakob Bornecrantz <jakob@tungstengraphics.com>
  * Copyright 2008 Intel Corporation
  *   Jesse Barnes <jesse.barnes@intel.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  * IN THE SOFTWARE.
  */

 /*
  * This fairly simple test program dumps output in a similar format to the
  * "xrandr" tool everyone knows & loves.  It's necessarily slightly different
  * since the kernel separates outputs into encoder and connector structures,
  * each with their own unique ID.  The program also allows test testing of the
  * memory management and mode setting APIs by allowing the user to specify a
  * connector and mode to use for mode setting.  If all works as expected, a
  * blue background should be painted on the monitor attached to the specified
  * connector after the selected mode is set.
  *
  * TODO: use cairo to write the mode info on the selected output once
  *       the mode has been programmed, along with possible test patterns.
  */
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
 #include <unistd.h>
 #include <string.h>
 #include <errno.h>

 #include "xf86drm.h"
 #include "xf86drmMode.h"
 #include "intel_bufmgr.h"

 drmModeRes *resources;
 int fd, modes;

 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

 struct type_name {
 	int type;
 	char *name;
 };

 #define type_name_fn(res) \
 char * res##_str(int type) {			\
 	int i;						\
 	for (i = 0; i < ARRAY_SIZE(res##_names); i++) { \
 		if (res##_names[i].type == type)	\
 			return res##_names[i].name;	\
 	}						\
 	return "(invalid)";				\
 }

 struct type_name encoder_type_names[] = {
 	{ DRM_MODE_ENCODER_NONE, "none" },
 	{ DRM_MODE_ENCODER_DAC, "DAC" },
 	{ DRM_MODE_ENCODER_TMDS, "TMDS" },
 	{ DRM_MODE_ENCODER_LVDS, "LVDS" },
 	{ DRM_MODE_ENCODER_TVDAC, "TVDAC" },
 };

 type_name_fn(encoder_type)

 struct type_name connector_status_names[] = {
 	{ DRM_MODE_CONNECTED, "connected" },
 	{ DRM_MODE_DISCONNECTED, "disconnected" },
 	{ DRM_MODE_UNKNOWNCONNECTION, "unknown" },
 };

 type_name_fn(connector_status)

 struct type_name connector_type_names[] = {
 	{ DRM_MODE_CONNECTOR_Unknown, "unknown" },
 	{ DRM_MODE_CONNECTOR_VGA, "VGA" },
 	{ DRM_MODE_CONNECTOR_DVII, "DVI-I" },
 	{ DRM_MODE_CONNECTOR_DVID, "DVI-D" },
 	{ DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
 	{ DRM_MODE_CONNECTOR_Composite, "composite" },
 	{ DRM_MODE_CONNECTOR_SVIDEO, "s-video" },
 	{ DRM_MODE_CONNECTOR_LVDS, "LVDS" },
 	{ DRM_MODE_CONNECTOR_Component, "component" },
 	{ DRM_MODE_CONNECTOR_9PinDIN, "9-pin DIN" },
 	{ DRM_MODE_CONNECTOR_DisplayPort, "displayport" },
 	{ DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
 	{ DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
 };

 type_name_fn(connector_type)

 void dump_encoders(void)
 {
 	drmModeEncoder *encoder;
 	int i;

 	printf("Encoders:\n");
 	printf("id\tcrtc\ttype\tpossible crtcs\tpossible clones\t\n");
 	for (i = 0; i < resources->count_encoders; i++) {
 		encoder = drmModeGetEncoder(fd, resources->encoders[i]);

 		if (!encoder) {
 			fprintf(stderr, "could not get encoder %i: %s\n",
 				resources->encoders[i], strerror(errno));
 			continue;
 		}
 		printf("%d\t%d\t%s\t0x%08x\t0x%08x\n",
 		       encoder->encoder_id,
 		       encoder->crtc_id,
 		       encoder_type_str(encoder->encoder_type),
 		       encoder->possible_crtcs,
 		       encoder->possible_clones);
 		drmModeFreeEncoder(encoder);
 	}
 }

 void dump_connectors(void)
 {
 	drmModeConnector *connector;
 	int i, j;

 	printf("Connectors:\n");
 	printf("id\tencoder\tstatus\t\ttype\tsize (mm)\tmodes\n");
 	for (i = 0; i < resources->count_connectors; i++) {
 		connector = drmModeGetConnector(fd, resources->connectors[i]);

 		if (!connector) {
 			fprintf(stderr, "could not get connector %i: %s\n",
 				resources->connectors[i], strerror(errno));
 			continue;
 		}

 		printf("%d\t%d\t%s\t%s\t%dx%d\t\t%d\n",
 		       connector->connector_id,
 		       connector->encoder_id,
 		       connector_status_str(connector->connection),
 		       connector_type_str(connector->connector_type),
 		       connector->mmWidth, connector->mmHeight,
 		       connector->count_modes);

 		if (!connector->count_modes)
 			continue;

 		printf("  modes:\n");
 		printf("  name refresh (Hz) hdisp hss hse htot vdisp "
 		       "vss vse vtot)\n");
 		for (j = 0; j < connector->count_modes; j++) {
 			struct drm_mode_modeinfo *mode;

 			mode = &connector->modes[j];
 			printf("  %s %.02f %d %d %d %d %d %d %d %d\n",
 			       mode->name,
 			       (float)mode->vrefresh / 1000,
 			       mode->hdisplay,
 			       mode->hsync_start,
 			       mode->hsync_end,
 			       mode->htotal,
 			       mode->vdisplay,
 			       mode->vsync_start,
 			       mode->vsync_end,
 			       mode->vtotal);
 		}
 		drmModeFreeConnector(connector);
 	}
 }

 void dump_crtcs(void)
 {
 	drmModeCrtc *crtc;
 	int i;

 	for (i = 0; i < resources->count_crtcs; i++) {
 		crtc = drmModeGetCrtc(fd, resources->crtcs[i]);

 		if (!crtc) {
 			fprintf(stderr, "could not get crtc %i: %s\n",
 				resources->crtcs[i], strerror(errno));
 			continue;
 		}
 		drmModeFreeCrtc(crtc);
 	}
 }

 void dump_framebuffers(void)
 {
 	drmModeFB *fb;
 	int i;

 	for (i = 0; i < resources->count_fbs; i++) {
 		fb = drmModeGetFB(fd, resources->fbs[i]);

 		if (!fb) {
 			fprintf(stderr, "could not get fb %i: %s\n",
 				resources->fbs[i], strerror(errno));
 			continue;
 		}
 		drmModeFreeFB(fb);
 	}
 }

 /*
  * Mode setting with the kernel interfaces is a bit of a chore.
  * First you have to find the connector in question and make sure the
  * requested mode is available.
  * Then you need to find the encoder attached to that connector so you
  * can bind it with a free crtc.
  */
 void set_mode(int connector_id, char *mode_str)
 {
 	drmModeConnector *connector;
 	drmModeEncoder *encoder = NULL;
 	struct drm_mode_modeinfo *mode = NULL;
 	drm_intel_bufmgr *bufmgr;
 	drm_intel_bo *bo;
 	unsigned int fb_id, *fb_ptr;
 	int i, j, size, ret, width, height;

 	/* First, find the connector & mode */
 	for (i = 0; i < resources->count_connectors; i++) {
 		connector = drmModeGetConnector(fd, resources->connectors[i]);

 		if (!connector) {
 			fprintf(stderr, "could not get connector %i: %s\n",
 				resources->connectors[i], strerror(errno));
 			drmModeFreeConnector(connector);
 			continue;
 		}

 		if (!connector->count_modes) {
 			drmModeFreeConnector(connector);
 			continue;
 		}

 		if (connector->connector_id != connector_id) {
 			drmModeFreeConnector(connector);
 			continue;
 		}

 		for (j = 0; j < connector->count_modes; j++) {
 			mode = &connector->modes[j];
 			if (!strcmp(mode->name, mode_str))
 				break;
 		}

 		/* Found it, break out */
 		if (mode)
 			break;

 		drmModeFreeConnector(connector);
 	}

 	if (!mode) {
 		fprintf(stderr, "failed to find mode \"%s\"\n", mode_str);
 		return;
 	}

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

 	/* Now get the encoder */
 	for (i = 0; i < resources->count_encoders; i++) {
 		encoder = drmModeGetEncoder(fd, resources->encoders[i]);

 		if (!encoder) {
 			fprintf(stderr, "could not get encoder %i: %s\n",
 				resources->encoders[i], strerror(errno));
 			drmModeFreeEncoder(encoder);
 			continue;
 		}

 		if (encoder->encoder_id  == connector->encoder_id)
 			break;

 		drmModeFreeEncoder(encoder);
 	}

 	bufmgr = drm_intel_bufmgr_gem_init(fd, 2<<20);
 	if (!bufmgr) {
 		fprintf(stderr, "failed to init bufmgr: %s\n", strerror(errno));
 		return;
 	}

 	/* Mode size at 32 bpp */
 	size = width * height * 4;

 	bo = drm_intel_bo_alloc(bufmgr, "frontbuffer", size, 4096);
 	if (!bo) {
 		fprintf(stderr, "failed to alloc buffer: %s\n",
 			strerror(errno));
 		return;
 	}

 	ret = drm_intel_bo_pin(bo, 4096);
 	if (ret) {
 		fprintf(stderr, "failed to pin buffer: %s\n", strerror(errno));
 		return;
 	}

 	ret = drm_intel_gem_bo_map_gtt(bo);
 	if (ret) {
 		fprintf(stderr, "failed to GTT map buffer: %s\n",
 			strerror(errno));
 		return;
 	}

 	fb_ptr = bo->virtual;

 	/* paint the buffer blue */
 	for (i = 0; i < width * height; i++)
 		fb_ptr[i] = 0xff;

 	ret = drmModeAddFB(fd, width, height, 32, 32, width * 4, bo->handle,
 			   &fb_id);
 	if (ret) {
 		fprintf(stderr, "failed to add fb: %s\n", strerror(errno));
 		return;
 	}

 	ret = drmModeSetCrtc(fd, encoder->crtc_id, fb_id, 0, 0,
 			     &connector->connector_id, 1, mode);
 	if (ret) {
 		fprintf(stderr, "failed to set mode: %s\n", strerror(errno));
 		return;
 	}
 }

 extern char *optarg;
 extern int optind, opterr, optopt;
 static char optstr[] = "ecpmfs:";

 void usage(char *name)
 {
 	fprintf(stderr, "usage: %s [-ecpmf]\n", name);
 	fprintf(stderr, "\t-e\tlist encoders\n");
 	fprintf(stderr, "\t-c\tlist connectors\n");
 	fprintf(stderr, "\t-p\tlist CRTCs (pipes)\n");
 	fprintf(stderr, "\t-m\tlist modes\n");
 	fprintf(stderr, "\t-f\tlist framebuffers\n");
 	fprintf(stderr, "\t-s <connector_id>:<mode>\tset a mode\n");
 	fprintf(stderr, "\n\tDefault is to dump all info.\n");
 	exit(0);
 }

 #define dump_resource(res) if (res) dump_##res()

 int main(int argc, char **argv)
 {
 	int c;
 	int encoders = 0, connectors = 0, crtcs = 0, framebuffers = 0;
 	char *modules[] = { "i915", "radeon" };
 	char *modeset = NULL, *mode, *connector;
 	int i, connector_id;

 	opterr = 0;
 	while ((c = getopt(argc, argv, optstr)) != -1) {
 		switch (c) {
 		case 'e':
 			encoders = 1;
 			break;
 		case 'c':
 			connectors = 1;
 			break;
 		case 'p':
 			crtcs = 1;
 			break;
 		case 'm':
 			modes = 1;
 			break;
 		case 'f':
 			framebuffers = 1;
 			break;
 		case 's':
 			modeset = strdup(optarg);
 			break;
 		default:
 			usage(argv[0]);
 			break;
 		}
 	}

 	if (argc == 1)
 		encoders = connectors = crtcs = modes = framebuffers = 1;

 	for (i = 0; i < ARRAY_SIZE(modules); i++) {
 		printf("trying to load module %s...", modules[i]);
 		fd = drmOpen(modules[i], NULL);
 		if (fd < 0) {
 			printf("failed.\n");
 		} else {
 			printf("success.\n");
 			break;
 		}
 	}

 	if (i == ARRAY_SIZE(modules)) {
 		fprintf(stderr, "failed to load any modules, aborting.\n");
 		return -1;
 	}

 	resources = drmModeGetResources(fd);
 	if (!resources) {
 		fprintf(stderr, "drmModeGetResources failed: %s\n",
 			strerror(errno));
 		drmClose(fd);
 		return 1;
 	}

 	dump_resource(encoders);
 	dump_resource(connectors);
 	dump_resource(crtcs);
 	dump_resource(framebuffers);

 	if (modeset) {
 		connector = strtok(modeset, ":");
 		if (!connector)
 			usage(argv[0]);
 		connector_id = atoi(connector);

 		mode = strtok(NULL, ":");
 		if (!mode)
 			usage(argv[0]);
 		printf("setting connector %d to mode %s\n", connector_id,
 		       mode);
 		set_mode(connector_id, mode);
 		sleep(3);
 	}

 	sleep(3);

 	drmModeFreeResources(resources);

 	return 0;
 }
	/*
	* DRM based mode setting test program
	* Copyright 2008 Tungsten Graphics
	* Jakob Bornecrantz <jakob@tungstengraphics.com>
	* Copyright 2008 Intel Corporation
	* Jesse Barnes <jesse.barnes@intel.com>
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
	* IN THE SOFTWARE.
	*/

	/*
	* This fairly simple test program dumps output in a similar format to the
	* "xrandr" tool everyone knows & loves. It's necessarily slightly different
	* since the kernel separates outputs into encoder and connector structures,
	* each with their own unique ID. The program also allows test testing of the
	* memory management and mode setting APIs by allowing the user to specify a
	* connector and mode to use for mode setting. If all works as expected, a
	* blue background should be painted on the monitor attached to the specified
	* connector after the selected mode is set.
	*
	* TODO: use cairo to write the mode info on the selected output once
	* the mode has been programmed, along with possible test patterns.
	*/
	#include <assert.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <stdint.h>
	#include <unistd.h>
	#include <string.h>
	#include <errno.h>

	#include "xf86drm.h"
	#include "xf86drmMode.h"
	#include "intel_bufmgr.h"

	drmModeRes *resources;
	int fd, modes;

	#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

	struct type_name {
	int type;
	char *name;
	};

	#define type_name_fn(res) \
	char * res##_str(int type) { \
	int i; \
	for (i = 0; i < ARRAY_SIZE(res##_names); i++) { \
	if (res##_names[i].type == type) \
	return res##_names[i].name; \
	} \
	return "(invalid)"; \
	}

	struct type_name encoder_type_names[] = {
	{ DRM_MODE_ENCODER_NONE, "none" },
	{ DRM_MODE_ENCODER_DAC, "DAC" },
	{ DRM_MODE_ENCODER_TMDS, "TMDS" },
	{ DRM_MODE_ENCODER_LVDS, "LVDS" },
	{ DRM_MODE_ENCODER_TVDAC, "TVDAC" },
	};

	type_name_fn(encoder_type)

	struct type_name connector_status_names[] = {
	{ DRM_MODE_CONNECTED, "connected" },
	{ DRM_MODE_DISCONNECTED, "disconnected" },
	{ DRM_MODE_UNKNOWNCONNECTION, "unknown" },
	};

	type_name_fn(connector_status)

	struct type_name connector_type_names[] = {
	{ DRM_MODE_CONNECTOR_Unknown, "unknown" },
	{ DRM_MODE_CONNECTOR_VGA, "VGA" },
	{ DRM_MODE_CONNECTOR_DVII, "DVI-I" },
	{ DRM_MODE_CONNECTOR_DVID, "DVI-D" },
	{ DRM_MODE_CONNECTOR_DVIA, "DVI-A" },
	{ DRM_MODE_CONNECTOR_Composite, "composite" },
	{ DRM_MODE_CONNECTOR_SVIDEO, "s-video" },
	{ DRM_MODE_CONNECTOR_LVDS, "LVDS" },
	{ DRM_MODE_CONNECTOR_Component, "component" },
	{ DRM_MODE_CONNECTOR_9PinDIN, "9-pin DIN" },
	{ DRM_MODE_CONNECTOR_DisplayPort, "displayport" },
	{ DRM_MODE_CONNECTOR_HDMIA, "HDMI-A" },
	{ DRM_MODE_CONNECTOR_HDMIB, "HDMI-B" },
	};

	type_name_fn(connector_type)

	void dump_encoders(void)
	{
	drmModeEncoder *encoder;
	int i;

	printf("Encoders:\n");
	printf("id\tcrtc\ttype\tpossible crtcs\tpossible clones\t\n");
	for (i = 0; i < resources->count_encoders; i++) {
	encoder = drmModeGetEncoder(fd, resources->encoders[i]);

	if (!encoder) {
	fprintf(stderr, "could not get encoder %i: %s\n",
	resources->encoders[i], strerror(errno));
	continue;
	}
	printf("%d\t%d\t%s\t0x%08x\t0x%08x\n",
	encoder->encoder_id,
	encoder->crtc_id,
	encoder_type_str(encoder->encoder_type),
	encoder->possible_crtcs,
	encoder->possible_clones);
	drmModeFreeEncoder(encoder);
	}
	}

	void dump_connectors(void)
	{
	drmModeConnector *connector;
	int i, j;

	printf("Connectors:\n");
	printf("id\tencoder\tstatus\t\ttype\tsize (mm)\tmodes\n");
	for (i = 0; i < resources->count_connectors; i++) {
	connector = drmModeGetConnector(fd, resources->connectors[i]);

	if (!connector) {
	fprintf(stderr, "could not get connector %i: %s\n",
	resources->connectors[i], strerror(errno));
	continue;
	}

	printf("%d\t%d\t%s\t%s\t%dx%d\t\t%d\n",
	connector->connector_id,
	connector->encoder_id,
	connector_status_str(connector->connection),
	connector_type_str(connector->connector_type),
	connector->mmWidth, connector->mmHeight,
	connector->count_modes);

	if (!connector->count_modes)
	continue;

	printf(" modes:\n");
	printf(" name refresh (Hz) hdisp hss hse htot vdisp "
	"vss vse vtot)\n");
	for (j = 0; j < connector->count_modes; j++) {
	struct drm_mode_modeinfo *mode;

	mode = &connector->modes[j];
	printf(" %s %.02f %d %d %d %d %d %d %d %d\n",
	mode->name,
	(float)mode->vrefresh / 1000,
	mode->hdisplay,
	mode->hsync_start,
	mode->hsync_end,
	mode->htotal,
	mode->vdisplay,
	mode->vsync_start,
	mode->vsync_end,
	mode->vtotal);
	}
	drmModeFreeConnector(connector);
	}
	}

	void dump_crtcs(void)
	{
	drmModeCrtc *crtc;
	int i;

	for (i = 0; i < resources->count_crtcs; i++) {
	crtc = drmModeGetCrtc(fd, resources->crtcs[i]);

	if (!crtc) {
	fprintf(stderr, "could not get crtc %i: %s\n",
	resources->crtcs[i], strerror(errno));
	continue;
	}
	drmModeFreeCrtc(crtc);
	}
	}

	void dump_framebuffers(void)
	{
	drmModeFB *fb;
	int i;

	for (i = 0; i < resources->count_fbs; i++) {
	fb = drmModeGetFB(fd, resources->fbs[i]);

	if (!fb) {
	fprintf(stderr, "could not get fb %i: %s\n",
	resources->fbs[i], strerror(errno));
	continue;
	}
	drmModeFreeFB(fb);
	}
	}

	/*
	* Mode setting with the kernel interfaces is a bit of a chore.
	* First you have to find the connector in question and make sure the
	* requested mode is available.
	* Then you need to find the encoder attached to that connector so you
	* can bind it with a free crtc.
	*/
	void set_mode(int connector_id, char *mode_str)
	{
	drmModeConnector *connector;
	drmModeEncoder *encoder = NULL;
	struct drm_mode_modeinfo *mode = NULL;
	drm_intel_bufmgr *bufmgr;
	drm_intel_bo *bo;
	unsigned int fb_id, *fb_ptr;
	int i, j, size, ret, width, height;

	/* First, find the connector & mode */
	for (i = 0; i < resources->count_connectors; i++) {
	connector = drmModeGetConnector(fd, resources->connectors[i]);

	if (!connector) {
	fprintf(stderr, "could not get connector %i: %s\n",
	resources->connectors[i], strerror(errno));
	drmModeFreeConnector(connector);
	continue;
	}

	if (!connector->count_modes) {
	drmModeFreeConnector(connector);
	continue;
	}

	if (connector->connector_id != connector_id) {
	drmModeFreeConnector(connector);
	continue;
	}

	for (j = 0; j < connector->count_modes; j++) {
	mode = &connector->modes[j];
	if (!strcmp(mode->name, mode_str))
	break;
	}

	/* Found it, break out */
	if (mode)
	break;

	drmModeFreeConnector(connector);
	}

	if (!mode) {
	fprintf(stderr, "failed to find mode \"%s\"\n", mode_str);
	return;
	}

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

	/* Now get the encoder */
	for (i = 0; i < resources->count_encoders; i++) {
	encoder = drmModeGetEncoder(fd, resources->encoders[i]);

	if (!encoder) {
	fprintf(stderr, "could not get encoder %i: %s\n",
	resources->encoders[i], strerror(errno));
	drmModeFreeEncoder(encoder);
	continue;
	}

	if (encoder->encoder_id == connector->encoder_id)
	break;

	drmModeFreeEncoder(encoder);
	}

	bufmgr = drm_intel_bufmgr_gem_init(fd, 2<<20);
	if (!bufmgr) {
	fprintf(stderr, "failed to init bufmgr: %s\n", strerror(errno));
	return;
	}

	/* Mode size at 32 bpp */
	size = width * height * 4;

	bo = drm_intel_bo_alloc(bufmgr, "frontbuffer", size, 4096);
	if (!bo) {
	fprintf(stderr, "failed to alloc buffer: %s\n",
	strerror(errno));
	return;
	}

	ret = drm_intel_bo_pin(bo, 4096);
	if (ret) {
	fprintf(stderr, "failed to pin buffer: %s\n", strerror(errno));
	return;
	}

	ret = drm_intel_gem_bo_map_gtt(bo);
	if (ret) {
	fprintf(stderr, "failed to GTT map buffer: %s\n",
	strerror(errno));
	return;
	}

	fb_ptr = bo->virtual;

	/* paint the buffer blue */
	for (i = 0; i < width * height; i++)
	fb_ptr[i] = 0xff;

	ret = drmModeAddFB(fd, width, height, 32, 32, width * 4, bo->handle,
	&fb_id);
	if (ret) {
	fprintf(stderr, "failed to add fb: %s\n", strerror(errno));
	return;
	}

	ret = drmModeSetCrtc(fd, encoder->crtc_id, fb_id, 0, 0,
	&connector->connector_id, 1, mode);
	if (ret) {
	fprintf(stderr, "failed to set mode: %s\n", strerror(errno));
	return;
	}
	}

	extern char *optarg;
	extern int optind, opterr, optopt;
	static char optstr[] = "ecpmfs:";

	void usage(char *name)
	{
	fprintf(stderr, "usage: %s [-ecpmf]\n", name);
	fprintf(stderr, "\t-e\tlist encoders\n");
	fprintf(stderr, "\t-c\tlist connectors\n");
	fprintf(stderr, "\t-p\tlist CRTCs (pipes)\n");
	fprintf(stderr, "\t-m\tlist modes\n");
	fprintf(stderr, "\t-f\tlist framebuffers\n");
	fprintf(stderr, "\t-s <connector_id>:<mode>\tset a mode\n");
	fprintf(stderr, "\n\tDefault is to dump all info.\n");
	exit(0);
	}

	#define dump_resource(res) if (res) dump_##res()

	int main(int argc, char **argv)
	{
	int c;
	int encoders = 0, connectors = 0, crtcs = 0, framebuffers = 0;
	char *modules[] = { "i915", "radeon" };
	char modeset = NULL, mode, *connector;
	int i, connector_id;

	opterr = 0;
	while ((c = getopt(argc, argv, optstr)) != -1) {
	switch (c) {
	case 'e':
	encoders = 1;
	break;
	case 'c':
	connectors = 1;
	break;
	case 'p':
	crtcs = 1;
	break;
	case 'm':
	modes = 1;
	break;
	case 'f':
	framebuffers = 1;
	break;
	case 's':
	modeset = strdup(optarg);
	break;
	default:
	usage(argv[0]);
	break;
	}
	}

	if (argc == 1)
	encoders = connectors = crtcs = modes = framebuffers = 1;

	for (i = 0; i < ARRAY_SIZE(modules); i++) {
	printf("trying to load module %s...", modules[i]);
	fd = drmOpen(modules[i], NULL);
	if (fd < 0) {
	printf("failed.\n");
	} else {
	printf("success.\n");
	break;
	}
	}

	if (i == ARRAY_SIZE(modules)) {
	fprintf(stderr, "failed to load any modules, aborting.\n");
	return -1;
	}

	resources = drmModeGetResources(fd);
	if (!resources) {
	fprintf(stderr, "drmModeGetResources failed: %s\n",
	strerror(errno));
	drmClose(fd);
	return 1;
	}

	dump_resource(encoders);
	dump_resource(connectors);
	dump_resource(crtcs);
	dump_resource(framebuffers);

	if (modeset) {
	connector = strtok(modeset, ":");
	if (!connector)
	usage(argv[0]);
	connector_id = atoi(connector);

	mode = strtok(NULL, ":");
	if (!mode)
	usage(argv[0]);
	printf("setting connector %d to mode %s\n", connector_id,
	mode);
	set_mode(connector_id, mode);
	sleep(3);
	}

	sleep(3);

	drmModeFreeResources(resources);

	return 0;
	}