/*
 * Copyright 2010 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 program is intended for testing of display functionality.  It should
 * allow for testing of
 *   - hotplug
 *   - mode setting
 *   - clone & twin modes
 *   - panel fitting
 *   - test patterns & pixel generators
 * Additional programs can test the detected outputs against VBT provided
 * device lists (both docked & undocked).
 *
 * TODO:
 * - pixel generator in transcoder
 * - test pattern reg in pipe
 * - test patterns on outputs (e.g. TV)
 * - handle hotplug (leaks crtcs, can't handle clones)
 * - allow mode force
 * - expose output specific controls
 *  - e.g. DDC-CI brightness
 *  - HDMI controls
 *  - panel brightness
 *  - DP commands (e.g. poweroff)
 * - verify outputs against VBT/physical connectors
 */
#include "config.h"

#include "igt.h"
#include <cairo.h>
#include <errno.h>
#include <getopt.h>
#include <libgen.h>
#include <math.h>
#include <stdint.h>
#include <stdbool.h>
#include <strings.h>
#include <unistd.h>
#include <termios.h>
#include <sys/poll.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "testdisplay.h"

#include <stdlib.h>
#include <signal.h>

enum {
	OPT_YB,
	OPT_YF,
};

static int tio_fd;
struct termios saved_tio;

drmModeRes *resources;
int drm_fd, modes;
int test_all_modes = 0, test_preferred_mode = 0, force_mode = 0, test_plane,
    test_stereo_modes;
uint64_t tiling = LOCAL_DRM_FORMAT_MOD_NONE;
int sleep_between_modes = 0;
int do_dpms = 0; /* This aliases to DPMS_ON */
uint32_t depth = 24, stride, bpp;
int qr_code = 0;
int specified_mode_num = -1, specified_disp_id = -1;
bool opt_dump_info = false;

drmModeModeInfo force_timing;

int crtc_x, crtc_y, crtc_w, crtc_h, width, height;
unsigned int plane_fb_id;
unsigned int plane_crtc_id;
unsigned int plane_id;
int plane_width, plane_height;

/*
 * 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.
 */
struct connector {
	uint32_t id;
	int mode_valid;
	drmModeModeInfo mode;
	drmModeEncoder *encoder;
	drmModeConnector *connector;
	int crtc;
	int pipe;
};

static void dump_connectors_fd(int drmfd)
{
	int i, j;

	drmModeRes *mode_resources = drmModeGetResources(drmfd);

	if (!mode_resources) {
		igt_warn("drmModeGetResources failed: %s\n", strerror(errno));
		return;
	}

	igt_info("Connectors:\n");
	igt_info("id\tencoder\tstatus\t\ttype\tsize (mm)\tmodes\n");
	for (i = 0; i < mode_resources->count_connectors; i++) {
		drmModeConnector *connector;

		connector = drmModeGetConnectorCurrent(drmfd,
						       mode_resources->connectors[i]);
		if (!connector) {
			igt_warn("could not get connector %i: %s\n", mode_resources->connectors[i], strerror(errno));
			continue;
		}

		igt_info("%d\t%d\t%s\t%s\t%dx%d\t\t%d\n", connector->connector_id, connector->encoder_id, kmstest_connector_status_str(connector->connection), kmstest_connector_type_str(connector->connector_type), connector->mmWidth, connector->mmHeight, connector->count_modes);

		if (!connector->count_modes)
			continue;

		igt_info("  modes:\n");
		igt_info("  name refresh (Hz) hdisp hss hse htot vdisp ""vss vse vtot flags type clock\n");
		for (j = 0; j < connector->count_modes; j++){
			igt_info("[%d]", j);
			kmstest_dump_mode(&connector->modes[j]);
		}

		drmModeFreeConnector(connector);
	}
	igt_info("\n");

	drmModeFreeResources(mode_resources);
}

static void dump_crtcs_fd(int drmfd)
{
	drmModeRes *mode_resources;

	mode_resources = drmModeGetResources(drmfd);
	if (!mode_resources)
		return;

	igt_info("CRTCs:\n");
	igt_info("id\tfb\tpos\tsize\n");
	for (int i = 0; i < mode_resources->count_crtcs; i++) {
		drmModeCrtc *crtc;

		crtc = drmModeGetCrtc(drmfd, mode_resources->crtcs[i]);
		if (!crtc) {
			igt_warn("could not get crtc %i: %s\n", mode_resources->crtcs[i], strerror(errno));
			continue;
		}
		igt_info("%d\t%d\t(%d,%d)\t(%dx%d)\n", crtc->crtc_id, crtc->buffer_id, crtc->x, crtc->y, crtc->width, crtc->height);
		kmstest_dump_mode(&crtc->mode);

		drmModeFreeCrtc(crtc);
	}
	igt_info("\n");

	drmModeFreeResources(mode_resources);
}

static void dump_info(void)
{
	dump_connectors_fd(drm_fd);
	dump_crtcs_fd(drm_fd);
}

static void connector_find_preferred_mode(uint32_t connector_id,
					  unsigned long crtc_idx_mask,
					  int mode_num, struct connector *c,
					  bool probe)
{
	struct kmstest_connector_config config;
	bool ret;

	if (probe)
		ret = kmstest_probe_connector_config(drm_fd, connector_id,
						     crtc_idx_mask, &config);
	else
		ret = kmstest_get_connector_config(drm_fd, connector_id,
						   crtc_idx_mask, &config);
	if (!ret) {
		c->mode_valid = 0;
		return;
	}

	c->connector = config.connector;
	c->encoder = config.encoder;
	c->crtc = config.crtc->crtc_id;
	c->pipe = config.pipe;

	if (mode_num != -1) {
		igt_assert(mode_num < config.connector->count_modes);
		c->mode = config.connector->modes[mode_num];
	} else {
		c->mode = config.default_mode;
	}
	c->mode_valid = 1;
}

static void
paint_color_key(struct igt_fb *fb_info)
{
	cairo_t *cr = igt_get_cairo_ctx(drm_fd, fb_info);

	cairo_rectangle(cr, crtc_x, crtc_y, crtc_w, crtc_h);
	cairo_set_source_rgb(cr, .8, .8, .8);
	cairo_fill(cr);

	igt_put_cairo_ctx(drm_fd, fb_info, cr);
}

static void paint_image(cairo_t *cr, const char *file)
{
	int img_x, img_y, img_w, img_h;

	img_y = height * (0.10 );
	img_h = height * 0.08 * 4;
	img_w = img_h;

	img_x = (width / 2) - (img_w / 2);

	igt_paint_image(cr, file, img_x, img_y, img_h, img_w);
}

static void paint_output_info(struct connector *c, struct igt_fb *fb)
{
	cairo_t *cr = igt_get_cairo_ctx(drm_fd, fb);
	int l_width = fb->width;
	int l_height = fb->height;
	double str_width;
	double x, y, top_y;
	double max_width;
	int i;

	cairo_move_to(cr, l_width / 2, l_height / 2);

	/* Print connector and mode name */
	cairo_set_font_size(cr, 48);
	igt_cairo_printf_line(cr, align_hcenter, 10, "%s",
		 kmstest_connector_type_str(c->connector->connector_type));

	cairo_set_font_size(cr, 36);
	str_width = igt_cairo_printf_line(cr, align_hcenter, 10,
		"%s @ %dHz on %s encoder", c->mode.name, c->mode.vrefresh,
		kmstest_encoder_type_str(c->encoder->encoder_type));

	cairo_rel_move_to(cr, -str_width / 2, 0);

	/* List available modes */
	cairo_set_font_size(cr, 18);
	str_width = igt_cairo_printf_line(cr, align_left, 10,
					      "Available modes:");
	cairo_rel_move_to(cr, str_width, 0);
	cairo_get_current_point(cr, &x, &top_y);

	max_width = 0;
	for (i = 0; i < c->connector->count_modes; i++) {
		cairo_get_current_point(cr, &x, &y);
		if (y >= l_height) {
			x += max_width + 10;
			max_width = 0;
			cairo_move_to(cr, x, top_y);
		}
		str_width = igt_cairo_printf_line(cr, align_right, 10,
			"%s @ %dHz", c->connector->modes[i].name,
			 c->connector->modes[i].vrefresh);
		if (str_width > max_width)
			max_width = str_width;
	}

	if (qr_code)
		paint_image(cr, "pass.png");

	igt_put_cairo_ctx(drm_fd, fb, cr);
}

static void sighandler(int signo)
{
	return;
}

static void set_single(void)
{
	int sigs[] = { SIGUSR1 };
	struct sigaction sa;
	sa.sa_handler = sighandler;

	sigemptyset(&sa.sa_mask);

	igt_warn_on_f(sigaction(sigs[0], &sa, NULL) == -1,
		      "Could not set signal handler");
}

static void
set_mode(struct connector *c)
{
	unsigned int fb_id = 0;
	struct igt_fb fb_info[2] = { };
	int j, test_mode_num, current_fb = 0, old_fb = -1;

	test_mode_num = 1;
	if (force_mode){
		memcpy( &c->mode, &force_timing, sizeof(force_timing));
		c->mode.vrefresh =(force_timing.clock*1e3)/(force_timing.htotal*force_timing.vtotal);
		c->mode_valid = 1;
		sprintf(c->mode.name, "%dx%d", force_timing.hdisplay, force_timing.vdisplay);
	} else if (test_all_modes)
		test_mode_num = c->connector->count_modes;

	for (j = 0; j < test_mode_num; j++) {

		if (test_all_modes)
			c->mode = c->connector->modes[j];

		/* set_mode() only tests 2D modes */
		if (c->mode.flags & DRM_MODE_FLAG_3D_MASK)
			continue;

		if (!c->mode_valid)
			continue;

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

		fb_id = igt_create_pattern_fb(drm_fd, width, height,
					      igt_bpp_depth_to_drm_format(bpp, depth),
					      tiling, &fb_info[current_fb]);
		paint_output_info(c, &fb_info[current_fb]);
		paint_color_key(&fb_info[current_fb]);

		igt_info("CRTC(%u):[%d]", c->crtc, j);
		kmstest_dump_mode(&c->mode);
		if (drmModeSetCrtc(drm_fd, c->crtc, fb_id, 0, 0,
				   &c->id, 1, &c->mode)) {
			igt_warn("failed to set mode (%dx%d@%dHz): %s\n", width, height, c->mode.vrefresh, strerror(errno));
			igt_remove_fb(drm_fd, &fb_info[current_fb]);
			continue;
		}

		if (old_fb != -1)
			igt_remove_fb(drm_fd, &fb_info[old_fb]);
		old_fb = current_fb;
		current_fb = 1 - current_fb;

		if (sleep_between_modes && test_all_modes && !qr_code)
			sleep(sleep_between_modes);

		if (do_dpms) {
			kmstest_set_connector_dpms(drm_fd, c->connector, do_dpms);
			sleep(sleep_between_modes);
			kmstest_set_connector_dpms(drm_fd, c->connector, DRM_MODE_DPMS_ON);
		}

		if (qr_code){
			set_single();
			pause();
		}
	}

	if (test_all_modes && old_fb != -1)
		igt_remove_fb(drm_fd, &fb_info[old_fb]);

	drmModeFreeEncoder(c->encoder);
	drmModeFreeConnector(c->connector);
}

static void do_set_stereo_mode(struct connector *c)
{
	uint32_t fb_id;

	fb_id = igt_create_stereo_fb(drm_fd, &c->mode,
				     igt_bpp_depth_to_drm_format(bpp, depth),
				     tiling);

	igt_warn_on_f(drmModeSetCrtc(drm_fd, c->crtc, fb_id, 0, 0, &c->id, 1, &c->mode),
		      "failed to set mode (%dx%d@%dHz): %s\n", width, height, c->mode.vrefresh, strerror(errno));
}

static void
set_stereo_mode(struct connector *c)
{
	int i, n;


	if (specified_mode_num != -1)
		n = 1;
	else
		n = c->connector->count_modes;

	for (i = 0; i < n; i++) {
		if (specified_mode_num == -1)
			c->mode = c->connector->modes[i];

		if (!c->mode_valid)
			continue;

		if (!(c->mode.flags & DRM_MODE_FLAG_3D_MASK))
			continue;

		igt_info("CRTC(%u): [%d]", c->crtc, i);
		kmstest_dump_mode(&c->mode);
		do_set_stereo_mode(c);

		if (qr_code) {
			set_single();
			pause();
		} else if (sleep_between_modes)
			sleep(sleep_between_modes);

		if (do_dpms) {
			kmstest_set_connector_dpms(drm_fd, c->connector, DRM_MODE_DPMS_OFF);
			sleep(sleep_between_modes);
			kmstest_set_connector_dpms(drm_fd, c->connector, DRM_MODE_DPMS_ON);
		}
	}

	drmModeFreeEncoder(c->encoder);
	drmModeFreeConnector(c->connector);
}

/*
 * Re-probe outputs and light up as many as possible.
 *
 * On Intel, we have two CRTCs that we can drive independently with
 * different timings and scanout buffers.
 *
 * Each connector has a corresponding encoder, except in the SDVO case
 * where an encoder may have multiple connectors.
 */
int update_display(bool probe)
{
	struct connector *connectors;
	int c;

	resources = drmModeGetResources(drm_fd);
	igt_require(resources);

	connectors = calloc(resources->count_connectors,
			    sizeof(struct connector));
	if (!connectors)
		return 0;

	if (test_preferred_mode || test_all_modes ||
	    force_mode || specified_disp_id != -1) {
		unsigned long crtc_idx_mask = -1UL;

		/* Find any connected displays */
		for (c = 0; c < resources->count_connectors; c++) {
			struct connector *connector = &connectors[c];

			connector->id = resources->connectors[c];
			if (specified_disp_id != -1 &&
			    connector->id != specified_disp_id)
				continue;

			connector_find_preferred_mode(connector->id,
						      crtc_idx_mask,
						      specified_mode_num,
						      connector, probe);
			if (!connector->mode_valid)
				continue;

			set_mode(connector);

			if (test_preferred_mode || force_mode ||
			    specified_mode_num != -1)
				crtc_idx_mask &= ~(1 << connector->pipe);

		}
	}

	if (test_stereo_modes) {
		for (c = 0; c < resources->count_connectors; c++) {
			struct connector *connector = &connectors[c];

			connector->id = resources->connectors[c];
			if (specified_disp_id != -1 &&
			    connector->id != specified_disp_id)
				continue;

			connector_find_preferred_mode(connector->id,
						      -1UL,
						      specified_mode_num,
						      connector, probe);
			if (!connector->mode_valid)
				continue;

			set_stereo_mode(connector);
		}
	}

	free(connectors);
	drmModeFreeResources(resources);
	return 1;
}

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

static void __attribute__((noreturn)) cleanup_and_exit(int ret)
{
	close(drm_fd);
	exit(ret);
}

static gboolean input_event(GIOChannel *source, GIOCondition condition,
				gpointer data)
{
	gchar buf[2];
	gsize count;

	count = read(g_io_channel_unix_get_fd(source), buf, sizeof(buf));
	if (buf[0] == 'q' && (count == 1 || buf[1] == '\n')) {
		cleanup_and_exit(0);
	}

	return TRUE;
}

static void enter_exec_path(void)
{
	char path[PATH_MAX];

	if (readlink("/proc/self/exe", path, sizeof(path)) > 0)
		chdir(dirname(path));
}

static void restore_termio_mode(int sig)
{
	tcsetattr(tio_fd, TCSANOW, &saved_tio);
	close(tio_fd);
}

static void set_termio_mode(void)
{
	struct termios tio;

	/* don't attempt to set terminal attributes if not in the foreground
	 * process group */
	if (getpgrp() != tcgetpgrp(STDOUT_FILENO))
		return;

	tio_fd = dup(STDIN_FILENO);
	tcgetattr(tio_fd, &saved_tio);
	igt_install_exit_handler(restore_termio_mode);
	tio = saved_tio;
	tio.c_lflag &= ~(ICANON | ECHO);
	tcsetattr(tio_fd, TCSANOW, &tio);
}

static char optstr[] = "3iaf:s:d:p:mrto:j:y";
static struct option long_opts[] = {
	{"yb", 0, 0, OPT_YB},
	{"yf", 0, 0, OPT_YF},
	{ 0, 0, 0, 0 }
};

static const char *help_str =
	"  -i\tdump info\n"
	"  -a\ttest all modes\n"
	"  -s\t<duration>\tsleep between each mode test (default: 0)\n"
	"  -d\t<depth>\tbit depth of scanout buffer\n"
	"  -p\t<planew,h>,<crtcx,y>,<crtcw,h> test overlay plane\n"
	"  -m\ttest the preferred mode\n"
	"  -3\ttest all 3D modes\n"
	"  -t\tuse an X-tiled framebuffer\n"
	"  -y, --yb\n"
	"  \tuse a Y-tiled framebuffer\n"
	"  --yf\tuse a Yf-tiled framebuffer\n"
	"  -j\tdo dpms off, optional arg to select dpms level (1-3)\n"
	"  -r\tprint a QR code on the screen whose content is \"pass\" for the automatic test\n"
	"  -o\t<id of the display>,<number of the mode>\tonly test specified mode on the specified display\n"
	"  -f\t<clock MHz>,<hdisp>,<hsync-start>,<hsync-end>,<htotal>,\n"
	"  \t<vdisp>,<vsync-start>,<vsync-end>,<vtotal>\n"
	"  \ttest force mode\n"
	"  \tDefault is to test all modes.\n"
	;

static int opt_handler(int opt, int opt_index, void *data)
{
	float force_clock;

	switch (opt) {
	case '3':
		test_stereo_modes = 1;
		break;
	case 'i':
		opt_dump_info = true;
		break;
	case 'a':
		test_all_modes = 1;
		break;
	case 'f':
		force_mode = 1;
		if (sscanf(optarg,"%f,%hu,%hu,%hu,%hu,%hu,%hu,%hu,%hu",
			   &force_clock,&force_timing.hdisplay, &force_timing.hsync_start,&force_timing.hsync_end,&force_timing.htotal,
			   &force_timing.vdisplay, &force_timing.vsync_start, &force_timing.vsync_end, &force_timing.vtotal)!= 9)
			return IGT_OPT_HANDLER_ERROR;
		force_timing.clock = force_clock*1000;

		break;
	case 's':
		sleep_between_modes = atoi(optarg);
		break;
	case 'j':
		do_dpms = atoi(optarg);
		if (do_dpms == 0)
			do_dpms = DRM_MODE_DPMS_OFF;
		break;
	case 'd':
		depth = atoi(optarg);
		igt_info("using depth %d\n", depth);
		break;
	case 'p':
		if (sscanf(optarg, "%d,%d,%d,%d,%d,%d", &plane_width,
			   &plane_height, &crtc_x, &crtc_y,
			   &crtc_w, &crtc_h) != 6)
			return IGT_OPT_HANDLER_ERROR;
		test_plane = 1;
		break;
	case 'm':
		test_preferred_mode = 1;
		break;
	case 't':
		tiling = LOCAL_I915_FORMAT_MOD_X_TILED;
		break;
	case 'y':
	case OPT_YB:
		tiling = LOCAL_I915_FORMAT_MOD_Y_TILED;
		break;
	case OPT_YF:
		tiling = LOCAL_I915_FORMAT_MOD_Yf_TILED;
		break;
	case 'r':
		qr_code = 1;
		break;
	case 'o':
		sscanf(optarg, "%d,%d", &specified_disp_id, &specified_mode_num);
		break;
	}

	return IGT_OPT_HANDLER_SUCCESS;
}

igt_simple_main_args(optstr, long_opts, help_str, opt_handler, NULL)
{
	int ret = 0;
	GIOChannel *stdinchannel;
	GMainLoop *mainloop;
	igt_skip_on_simulation();

	enter_exec_path();

	set_termio_mode();

	if (depth <= 8)
		bpp = 8;
	else if (depth <= 16)
		bpp = 16;
	else if (depth <= 32)
		bpp = 32;

	if (!test_all_modes && !force_mode && !test_preferred_mode &&
	    specified_mode_num == -1 && !test_stereo_modes)
		test_all_modes = 1;

	drm_fd = drm_open_driver(DRIVER_ANY);

	if (test_stereo_modes &&
	    drmSetClientCap(drm_fd, DRM_CLIENT_CAP_STEREO_3D, 1) < 0) {
		igt_warn("DRM_CLIENT_CAP_STEREO_3D failed\n");
		goto out_close;
	}

	if (opt_dump_info) {
		dump_info();
		goto out_close;
	}

	kmstest_set_vt_graphics_mode();

	mainloop = g_main_loop_new(NULL, FALSE);
	if (!mainloop) {
		igt_warn("failed to create glib mainloop\n");
		ret = -1;
		goto out_close;
	}

	if (!testdisplay_setup_hotplug()) {
		igt_warn("failed to initialize hotplug support\n");
		goto out_mainloop;
	}

	stdinchannel = g_io_channel_unix_new(0);
	if (!stdinchannel) {
		igt_warn("failed to create stdin GIO channel\n");
		goto out_hotplug;
	}

	ret = g_io_add_watch(stdinchannel, G_IO_IN | G_IO_ERR, input_event,
			     NULL);
	if (ret < 0) {
		igt_warn("failed to add watch on stdin GIO channel\n");
		goto out_stdio;
	}

	ret = 0;

	if (!update_display(false)) {
		ret = 1;
		goto out_stdio;
	}

	if (test_all_modes)
		goto out_stdio;

	g_main_loop_run(mainloop);

out_stdio:
	g_io_channel_shutdown(stdinchannel, TRUE, NULL);
out_hotplug:
	testdisplay_cleanup_hotplug();
out_mainloop:
	g_main_loop_unref(mainloop);
out_close:
	close(drm_fd);

	igt_assert_eq(ret, 0);
}
