drm_fb_helper.c 39.1 KB
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/*
 * Copyright (c) 2006-2009 Red Hat Inc.
 * Copyright (c) 2006-2008 Intel Corporation
 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
 *
 * DRM framebuffer helper functions
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting documentation, and
 * that the name of the copyright holders not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  The copyright holders make no representations
 * about the suitability of this software for any purpose.  It is provided "as
 * is" without express or implied warranty.
 *
 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 *
 * Authors:
 *      Dave Airlie <airlied@linux.ie>
 *      Jesse Barnes <jesse.barnes@intel.com>
 */
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#include <linux/kernel.h>
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#include <linux/sysrq.h>
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#include <linux/slab.h>
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#include <linux/fb.h>
#include "drmP.h"
#include "drm_crtc.h"
#include "drm_fb_helper.h"
#include "drm_crtc_helper.h"

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MODULE_AUTHOR("David Airlie, Jesse Barnes");
MODULE_DESCRIPTION("DRM KMS helper");
MODULE_LICENSE("GPL and additional rights");

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static LIST_HEAD(kernel_fb_helper_list);

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/* simple single crtc case helper function */
int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
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{
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	struct drm_device *dev = fb_helper->dev;
	struct drm_connector *connector;
	int i;
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	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
		struct drm_fb_helper_connector *fb_helper_connector;

		fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
		if (!fb_helper_connector)
			goto fail;
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		fb_helper_connector->connector = connector;
		fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
	}
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	return 0;
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fail:
	for (i = 0; i < fb_helper->connector_count; i++) {
		kfree(fb_helper->connector_info[i]);
		fb_helper->connector_info[i] = NULL;
	}
	fb_helper->connector_count = 0;
	return -ENOMEM;
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}
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EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
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/**
 * drm_fb_helper_connector_parse_command_line - parse command line for connector
 * @connector - connector to parse line for
 * @mode_option - per connector mode option
 *
 * This parses the connector specific then generic command lines for
 * modes and options to configure the connector.
 *
 * This uses the same parameters as the fb modedb.c, except for extra
 *	<xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m][eDd]
 *
 * enable/enable Digital/disable bit at the end
 */
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static bool drm_fb_helper_connector_parse_command_line(struct drm_fb_helper_connector *fb_helper_conn,
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						       const char *mode_option)
{
	const char *name;
	unsigned int namelen;
	int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
	unsigned int xres = 0, yres = 0, bpp = 32, refresh = 0;
	int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
	int i;
	enum drm_connector_force force = DRM_FORCE_UNSPECIFIED;
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	struct drm_fb_helper_cmdline_mode *cmdline_mode;
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	struct drm_connector *connector;
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	if (!fb_helper_conn)
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		return false;
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	connector = fb_helper_conn->connector;
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	cmdline_mode = &fb_helper_conn->cmdline_mode;
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	if (!mode_option)
		mode_option = fb_mode_option;

	if (!mode_option) {
		cmdline_mode->specified = false;
		return false;
	}

	name = mode_option;
	namelen = strlen(name);
	for (i = namelen-1; i >= 0; i--) {
		switch (name[i]) {
		case '@':
			namelen = i;
			if (!refresh_specified && !bpp_specified &&
			    !yres_specified) {
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				refresh = simple_strtol(&name[i+1], NULL, 10);
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				refresh_specified = 1;
				if (cvt || rb)
					cvt = 0;
			} else
				goto done;
			break;
		case '-':
			namelen = i;
			if (!bpp_specified && !yres_specified) {
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				bpp = simple_strtol(&name[i+1], NULL, 10);
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				bpp_specified = 1;
				if (cvt || rb)
					cvt = 0;
			} else
				goto done;
			break;
		case 'x':
			if (!yres_specified) {
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				yres = simple_strtol(&name[i+1], NULL, 10);
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				yres_specified = 1;
			} else
				goto done;
		case '0' ... '9':
			break;
		case 'M':
			if (!yres_specified)
				cvt = 1;
			break;
		case 'R':
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			if (cvt)
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				rb = 1;
			break;
		case 'm':
			if (!cvt)
				margins = 1;
			break;
		case 'i':
			if (!cvt)
				interlace = 1;
			break;
		case 'e':
			force = DRM_FORCE_ON;
			break;
		case 'D':
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			if ((connector->connector_type != DRM_MODE_CONNECTOR_DVII) &&
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			    (connector->connector_type != DRM_MODE_CONNECTOR_HDMIB))
				force = DRM_FORCE_ON;
			else
				force = DRM_FORCE_ON_DIGITAL;
			break;
		case 'd':
			force = DRM_FORCE_OFF;
			break;
		default:
			goto done;
		}
	}
	if (i < 0 && yres_specified) {
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		xres = simple_strtol(name, NULL, 10);
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		res_specified = 1;
	}
done:

	DRM_DEBUG_KMS("cmdline mode for connector %s %dx%d@%dHz%s%s%s\n",
		drm_get_connector_name(connector), xres, yres,
		(refresh) ? refresh : 60, (rb) ? " reduced blanking" :
		"", (margins) ? " with margins" : "", (interlace) ?
		" interlaced" : "");

	if (force) {
		const char *s;
		switch (force) {
		case DRM_FORCE_OFF: s = "OFF"; break;
		case DRM_FORCE_ON_DIGITAL: s = "ON - dig"; break;
		default:
		case DRM_FORCE_ON: s = "ON"; break;
		}

		DRM_INFO("forcing %s connector %s\n",
			 drm_get_connector_name(connector), s);
		connector->force = force;
	}

	if (res_specified) {
		cmdline_mode->specified = true;
		cmdline_mode->xres = xres;
		cmdline_mode->yres = yres;
	}

	if (refresh_specified) {
		cmdline_mode->refresh_specified = true;
		cmdline_mode->refresh = refresh;
	}

	if (bpp_specified) {
		cmdline_mode->bpp_specified = true;
		cmdline_mode->bpp = bpp;
	}
	cmdline_mode->rb = rb ? true : false;
	cmdline_mode->cvt = cvt  ? true : false;
	cmdline_mode->interlace = interlace ? true : false;

	return true;
}

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static int drm_fb_helper_parse_command_line(struct drm_fb_helper *fb_helper)
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{
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	struct drm_fb_helper_connector *fb_helper_conn;
	int i;
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	for (i = 0; i < fb_helper->connector_count; i++) {
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		char *option = NULL;

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		fb_helper_conn = fb_helper->connector_info[i];

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		/* do something on return - turn off connector maybe */
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		if (fb_get_options(drm_get_connector_name(fb_helper_conn->connector), &option))
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			continue;

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		drm_fb_helper_connector_parse_command_line(fb_helper_conn, option);
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	}
	return 0;
}

J
Jesse Barnes 已提交
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int drm_fb_helper_debug_enter(struct fb_info *info)
{
	struct drm_fb_helper *helper = info->par;
	struct drm_crtc_helper_funcs *funcs;
	int i;

	if (list_empty(&kernel_fb_helper_list))
		return false;

	list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
		for (i = 0; i < helper->crtc_count; i++) {
			struct drm_mode_set *mode_set =
				&helper->crtc_info[i].mode_set;

			if (!mode_set->crtc->enabled)
				continue;

			funcs =	mode_set->crtc->helper_private;
			funcs->mode_set_base_atomic(mode_set->crtc,
						    mode_set->fb,
						    mode_set->x,
						    mode_set->y);

		}
	}

	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_debug_enter);

/* Find the real fb for a given fb helper CRTC */
static struct drm_framebuffer *drm_mode_config_fb(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct drm_crtc *c;

	list_for_each_entry(c, &dev->mode_config.crtc_list, head) {
		if (crtc->base.id == c->base.id)
			return c->fb;
	}

	return NULL;
}

int drm_fb_helper_debug_leave(struct fb_info *info)
{
	struct drm_fb_helper *helper = info->par;
	struct drm_crtc *crtc;
	struct drm_crtc_helper_funcs *funcs;
	struct drm_framebuffer *fb;
	int i;

	for (i = 0; i < helper->crtc_count; i++) {
		struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
		crtc = mode_set->crtc;
		funcs = crtc->helper_private;
		fb = drm_mode_config_fb(crtc);

		if (!crtc->enabled)
			continue;

		if (!fb) {
			DRM_ERROR("no fb to restore??\n");
			continue;
		}

		funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x,
					    crtc->y);
	}

	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_debug_leave);

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bool drm_fb_helper_force_kernel_mode(void)
{
	int i = 0;
	bool ret, error = false;
	struct drm_fb_helper *helper;

	if (list_empty(&kernel_fb_helper_list))
		return false;

	list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) {
		for (i = 0; i < helper->crtc_count; i++) {
			struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;
			ret = drm_crtc_helper_set_config(mode_set);
			if (ret)
				error = true;
		}
	}
	return error;
}

int drm_fb_helper_panic(struct notifier_block *n, unsigned long ununsed,
			void *panic_str)
{
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	printk(KERN_ERR "panic occurred, switching back to text console\n");
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	return drm_fb_helper_force_kernel_mode();
	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_panic);

static struct notifier_block paniced = {
	.notifier_call = drm_fb_helper_panic,
};

/**
 * drm_fb_helper_restore - restore the framebuffer console (kernel) config
 *
 * Restore's the kernel's fbcon mode, used for lastclose & panic paths.
 */
void drm_fb_helper_restore(void)
{
	bool ret;
	ret = drm_fb_helper_force_kernel_mode();
	if (ret == true)
		DRM_ERROR("Failed to restore crtc configuration\n");
}
EXPORT_SYMBOL(drm_fb_helper_restore);

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#ifdef CONFIG_MAGIC_SYSRQ
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static void drm_fb_helper_restore_work_fn(struct work_struct *ignored)
{
	drm_fb_helper_restore();
}
static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn);

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static void drm_fb_helper_sysrq(int dummy1)
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{
	schedule_work(&drm_fb_helper_restore_work);
}

static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = {
	.handler = drm_fb_helper_sysrq,
	.help_msg = "force-fb(V)",
	.action_msg = "Restore framebuffer console",
};
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#else
static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };
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#endif
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static void drm_fb_helper_on(struct fb_info *info)
{
	struct drm_fb_helper *fb_helper = info->par;
	struct drm_device *dev = fb_helper->dev;
	struct drm_crtc *crtc;
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	struct drm_crtc_helper_funcs *crtc_funcs;
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	struct drm_connector *connector;
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	struct drm_encoder *encoder;
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	int i, j;
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	/*
	 * For each CRTC in this fb, turn the crtc on then,
	 * find all associated encoders and turn them on.
	 */
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	mutex_lock(&dev->mode_config.mutex);
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	for (i = 0; i < fb_helper->crtc_count; i++) {
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		crtc = fb_helper->crtc_info[i].mode_set.crtc;
		crtc_funcs = crtc->helper_private;
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		if (!crtc->enabled)
			continue;

		crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
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		/* Walk the connectors & encoders on this fb turning them on */
		for (j = 0; j < fb_helper->connector_count; j++) {
			connector = fb_helper->connector_info[j]->connector;
			connector->dpms = DRM_MODE_DPMS_ON;
			drm_connector_property_set_value(connector,
							 dev->mode_config.dpms_property,
							 DRM_MODE_DPMS_ON);
		}
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		/* Found a CRTC on this fb, now find encoders */
		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
			if (encoder->crtc == crtc) {
				struct drm_encoder_helper_funcs *encoder_funcs;
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				encoder_funcs = encoder->helper_private;
				encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
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			}
		}
	}
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	mutex_unlock(&dev->mode_config.mutex);
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}

static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
{
	struct drm_fb_helper *fb_helper = info->par;
	struct drm_device *dev = fb_helper->dev;
	struct drm_crtc *crtc;
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	struct drm_crtc_helper_funcs *crtc_funcs;
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	struct drm_connector *connector;
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	struct drm_encoder *encoder;
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	int i, j;
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	/*
	 * For each CRTC in this fb, find all associated encoders
	 * and turn them off, then turn off the CRTC.
	 */
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	mutex_lock(&dev->mode_config.mutex);
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	for (i = 0; i < fb_helper->crtc_count; i++) {
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		crtc = fb_helper->crtc_info[i].mode_set.crtc;
		crtc_funcs = crtc->helper_private;
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		if (!crtc->enabled)
			continue;
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		/* Walk the connectors on this fb and mark them off */
		for (j = 0; j < fb_helper->connector_count; j++) {
			connector = fb_helper->connector_info[j]->connector;
			connector->dpms = dpms_mode;
			drm_connector_property_set_value(connector,
							 dev->mode_config.dpms_property,
							 dpms_mode);
		}
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		/* Found a CRTC on this fb, now find encoders */
		list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
			if (encoder->crtc == crtc) {
				struct drm_encoder_helper_funcs *encoder_funcs;
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				encoder_funcs = encoder->helper_private;
				encoder_funcs->dpms(encoder, dpms_mode);
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			}
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		}
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		crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
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	}
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	mutex_unlock(&dev->mode_config.mutex);
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}

int drm_fb_helper_blank(int blank, struct fb_info *info)
{
	switch (blank) {
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	/* Display: On; HSync: On, VSync: On */
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	case FB_BLANK_UNBLANK:
		drm_fb_helper_on(info);
		break;
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	/* Display: Off; HSync: On, VSync: On */
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	case FB_BLANK_NORMAL:
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		drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
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		break;
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	/* Display: Off; HSync: Off, VSync: On */
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	case FB_BLANK_HSYNC_SUSPEND:
		drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
		break;
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	/* Display: Off; HSync: On, VSync: Off */
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	case FB_BLANK_VSYNC_SUSPEND:
		drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
		break;
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	/* Display: Off; HSync: Off, VSync: Off */
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	case FB_BLANK_POWERDOWN:
		drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
		break;
	}
	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_blank);

static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
{
	int i;

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	for (i = 0; i < helper->connector_count; i++)
		kfree(helper->connector_info[i]);
	kfree(helper->connector_info);
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	for (i = 0; i < helper->crtc_count; i++)
		kfree(helper->crtc_info[i].mode_set.connectors);
	kfree(helper->crtc_info);
}

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int drm_fb_helper_init(struct drm_device *dev,
		       struct drm_fb_helper *fb_helper,
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		       int crtc_count, int max_conn_count)
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{
	struct drm_crtc *crtc;
	int ret = 0;
	int i;

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	fb_helper->dev = dev;

	INIT_LIST_HEAD(&fb_helper->kernel_fb_list);

	fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
	if (!fb_helper->crtc_info)
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		return -ENOMEM;

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	fb_helper->crtc_count = crtc_count;
	fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
	if (!fb_helper->connector_info) {
		kfree(fb_helper->crtc_info);
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		return -ENOMEM;
	}
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	fb_helper->connector_count = 0;
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	for (i = 0; i < crtc_count; i++) {
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		fb_helper->crtc_info[i].mode_set.connectors =
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			kcalloc(max_conn_count,
				sizeof(struct drm_connector *),
				GFP_KERNEL);

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		if (!fb_helper->crtc_info[i].mode_set.connectors) {
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			ret = -ENOMEM;
			goto out_free;
		}
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		fb_helper->crtc_info[i].mode_set.num_connectors = 0;
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	}

	i = 0;
	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
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		fb_helper->crtc_info[i].crtc_id = crtc->base.id;
		fb_helper->crtc_info[i].mode_set.crtc = crtc;
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		i++;
	}
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	fb_helper->conn_limit = max_conn_count;
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	return 0;
out_free:
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	drm_fb_helper_crtc_free(fb_helper);
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	return -ENOMEM;
}
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EXPORT_SYMBOL(drm_fb_helper_init);

void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
{
	if (!list_empty(&fb_helper->kernel_fb_list)) {
		list_del(&fb_helper->kernel_fb_list);
		if (list_empty(&kernel_fb_helper_list)) {
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			printk(KERN_INFO "drm: unregistered panic notifier\n");
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			atomic_notifier_chain_unregister(&panic_notifier_list,
							 &paniced);
			unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
		}
	}

	drm_fb_helper_crtc_free(fb_helper);

}
EXPORT_SYMBOL(drm_fb_helper_fini);
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static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
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		     u16 blue, u16 regno, struct fb_info *info)
{
	struct drm_fb_helper *fb_helper = info->par;
	struct drm_framebuffer *fb = fb_helper->fb;
	int pindex;

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	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
		u32 *palette;
		u32 value;
		/* place color in psuedopalette */
		if (regno > 16)
			return -EINVAL;
		palette = (u32 *)info->pseudo_palette;
		red >>= (16 - info->var.red.length);
		green >>= (16 - info->var.green.length);
		blue >>= (16 - info->var.blue.length);
		value = (red << info->var.red.offset) |
			(green << info->var.green.offset) |
			(blue << info->var.blue.offset);
		palette[regno] = value;
		return 0;
	}

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	pindex = regno;

	if (fb->bits_per_pixel == 16) {
		pindex = regno << 3;

		if (fb->depth == 16 && regno > 63)
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			return -EINVAL;
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		if (fb->depth == 15 && regno > 31)
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			return -EINVAL;
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		if (fb->depth == 16) {
			u16 r, g, b;
			int i;
			if (regno < 32) {
				for (i = 0; i < 8; i++)
					fb_helper->funcs->gamma_set(crtc, red,
						green, blue, pindex + i);
			}

			fb_helper->funcs->gamma_get(crtc, &r,
						    &g, &b,
						    pindex >> 1);

			for (i = 0; i < 4; i++)
				fb_helper->funcs->gamma_set(crtc, r,
							    green, b,
							    (pindex >> 1) + i);
		}
	}

	if (fb->depth != 16)
		fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
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	return 0;
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}

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int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
{
	struct drm_fb_helper *fb_helper = info->par;
646
	struct drm_crtc_helper_funcs *crtc_funcs;
647 648 649 650 651
	u16 *red, *green, *blue, *transp;
	struct drm_crtc *crtc;
	int i, rc = 0;
	int start;

652 653 654
	for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
		crtc_funcs = crtc->helper_private;
655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671

		red = cmap->red;
		green = cmap->green;
		blue = cmap->blue;
		transp = cmap->transp;
		start = cmap->start;

		for (i = 0; i < cmap->len; i++) {
			u16 hred, hgreen, hblue, htransp = 0xffff;

			hred = *red++;
			hgreen = *green++;
			hblue = *blue++;

			if (transp)
				htransp = *transp++;

672 673 674
			rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
			if (rc)
				return rc;
675 676 677 678 679 680 681
		}
		crtc_funcs->load_lut(crtc);
	}
	return rc;
}
EXPORT_SYMBOL(drm_fb_helper_setcmap);

682 683 684 685 686 687 688
int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
			    struct fb_info *info)
{
	struct drm_fb_helper *fb_helper = info->par;
	struct drm_framebuffer *fb = fb_helper->fb;
	int depth;

689
	if (var->pixclock != 0 || in_dbg_master())
690 691 692
		return -EINVAL;

	/* Need to resize the fb object !!! */
693 694 695 696
	if (var->bits_per_pixel > fb->bits_per_pixel || var->xres > fb->width || var->yres > fb->height) {
		DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
			  "object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
			  fb->width, fb->height, fb->bits_per_pixel);
697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779
		return -EINVAL;
	}

	switch (var->bits_per_pixel) {
	case 16:
		depth = (var->green.length == 6) ? 16 : 15;
		break;
	case 32:
		depth = (var->transp.length > 0) ? 32 : 24;
		break;
	default:
		depth = var->bits_per_pixel;
		break;
	}

	switch (depth) {
	case 8:
		var->red.offset = 0;
		var->green.offset = 0;
		var->blue.offset = 0;
		var->red.length = 8;
		var->green.length = 8;
		var->blue.length = 8;
		var->transp.length = 0;
		var->transp.offset = 0;
		break;
	case 15:
		var->red.offset = 10;
		var->green.offset = 5;
		var->blue.offset = 0;
		var->red.length = 5;
		var->green.length = 5;
		var->blue.length = 5;
		var->transp.length = 1;
		var->transp.offset = 15;
		break;
	case 16:
		var->red.offset = 11;
		var->green.offset = 5;
		var->blue.offset = 0;
		var->red.length = 5;
		var->green.length = 6;
		var->blue.length = 5;
		var->transp.length = 0;
		var->transp.offset = 0;
		break;
	case 24:
		var->red.offset = 16;
		var->green.offset = 8;
		var->blue.offset = 0;
		var->red.length = 8;
		var->green.length = 8;
		var->blue.length = 8;
		var->transp.length = 0;
		var->transp.offset = 0;
		break;
	case 32:
		var->red.offset = 16;
		var->green.offset = 8;
		var->blue.offset = 0;
		var->red.length = 8;
		var->green.length = 8;
		var->blue.length = 8;
		var->transp.length = 8;
		var->transp.offset = 24;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_check_var);

/* this will let fbcon do the mode init */
int drm_fb_helper_set_par(struct fb_info *info)
{
	struct drm_fb_helper *fb_helper = info->par;
	struct drm_device *dev = fb_helper->dev;
	struct fb_var_screeninfo *var = &info->var;
	struct drm_crtc *crtc;
	int ret;
	int i;

780
	if (var->pixclock != 0) {
P
Pavel Roskin 已提交
781
		DRM_ERROR("PIXEL CLOCK SET\n");
782 783 784
		return -EINVAL;
	}

785 786 787
	mutex_lock(&dev->mode_config.mutex);
	for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
788 789
		ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
		if (ret) {
790
			mutex_unlock(&dev->mode_config.mutex);
791
			return ret;
792 793
		}
	}
794
	mutex_unlock(&dev->mode_config.mutex);
795 796 797

	if (fb_helper->delayed_hotplug) {
		fb_helper->delayed_hotplug = false;
798
		drm_fb_helper_hotplug_event(fb_helper);
799
	}
800 801 802 803 804 805 806 807 808 809 810 811 812 813
	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_set_par);

int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
			      struct fb_info *info)
{
	struct drm_fb_helper *fb_helper = info->par;
	struct drm_device *dev = fb_helper->dev;
	struct drm_mode_set *modeset;
	struct drm_crtc *crtc;
	int ret = 0;
	int i;

814 815 816
	mutex_lock(&dev->mode_config.mutex);
	for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
817 818 819 820 821 822 823 824 825 826 827 828 829 830

		modeset = &fb_helper->crtc_info[i].mode_set;

		modeset->x = var->xoffset;
		modeset->y = var->yoffset;

		if (modeset->num_connectors) {
			ret = crtc->funcs->set_config(modeset);
			if (!ret) {
				info->var.xoffset = var->xoffset;
				info->var.yoffset = var->yoffset;
			}
		}
	}
831
	mutex_unlock(&dev->mode_config.mutex);
832 833 834 835
	return ret;
}
EXPORT_SYMBOL(drm_fb_helper_pan_display);

836 837
int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
				  int preferred_bpp)
838 839 840
{
	int new_fb = 0;
	int crtc_count = 0;
841
	int i;
842
	struct fb_info *info;
843
	struct drm_fb_helper_surface_size sizes;
844
	int gamma_size = 0;
845 846 847 848 849 850

	memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size));
	sizes.surface_depth = 24;
	sizes.surface_bpp = 32;
	sizes.fb_width = (unsigned)-1;
	sizes.fb_height = (unsigned)-1;
851

852 853
	/* if driver picks 8 or 16 by default use that
	   for both depth/bpp */
854 855
	if (preferred_bpp != sizes.surface_bpp) {
		sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
856
	}
857
	/* first up get a count of crtcs now in use and new min/maxes width/heights */
858 859
	for (i = 0; i < fb_helper->connector_count; i++) {
		struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
860 861
		struct drm_fb_helper_cmdline_mode *cmdline_mode;

862
		cmdline_mode = &fb_helper_conn->cmdline_mode;
863 864 865 866

		if (cmdline_mode->bpp_specified) {
			switch (cmdline_mode->bpp) {
			case 8:
867
				sizes.surface_depth = sizes.surface_bpp = 8;
868 869
				break;
			case 15:
870 871
				sizes.surface_depth = 15;
				sizes.surface_bpp = 16;
872 873
				break;
			case 16:
874
				sizes.surface_depth = sizes.surface_bpp = 16;
875 876
				break;
			case 24:
877
				sizes.surface_depth = sizes.surface_bpp = 24;
878 879
				break;
			case 32:
880 881
				sizes.surface_depth = 24;
				sizes.surface_bpp = 32;
882 883 884 885 886 887
				break;
			}
			break;
		}
	}

888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903
	crtc_count = 0;
	for (i = 0; i < fb_helper->crtc_count; i++) {
		struct drm_display_mode *desired_mode;
		desired_mode = fb_helper->crtc_info[i].desired_mode;

		if (desired_mode) {
			if (gamma_size == 0)
				gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size;
			if (desired_mode->hdisplay < sizes.fb_width)
				sizes.fb_width = desired_mode->hdisplay;
			if (desired_mode->vdisplay < sizes.fb_height)
				sizes.fb_height = desired_mode->vdisplay;
			if (desired_mode->hdisplay > sizes.surface_width)
				sizes.surface_width = desired_mode->hdisplay;
			if (desired_mode->vdisplay > sizes.surface_height)
				sizes.surface_height = desired_mode->vdisplay;
904 905 906 907
			crtc_count++;
		}
	}

908
	if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
909 910
		/* hmm everyone went away - assume VGA cable just fell out
		   and will come back later. */
911
		DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
912 913
		sizes.fb_width = sizes.surface_width = 1024;
		sizes.fb_height = sizes.surface_height = 768;
914 915
	}

916
	/* push down into drivers */
917
	new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
918 919
	if (new_fb < 0)
		return new_fb;
920

921
	info = fb_helper->fbdev;
922

923 924 925
	/* set the fb pointer */
	for (i = 0; i < fb_helper->crtc_count; i++) {
		fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
926 927 928
	}

	if (new_fb) {
929
		info->var.pixclock = 0;
930
		if (register_framebuffer(info) < 0) {
931
			return -EINVAL;
932
		}
933 934 935 936

		printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
		       info->fix.id);

937 938 939 940 941 942 943
	} else {
		drm_fb_helper_set_par(info);
	}

	/* Switch back to kernel console on panic */
	/* multi card linked list maybe */
	if (list_empty(&kernel_fb_helper_list)) {
944
		printk(KERN_INFO "drm: registered panic notifier\n");
945 946 947 948
		atomic_notifier_chain_register(&panic_notifier_list,
					       &paniced);
		register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
	}
949 950 951
	if (new_fb)
		list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);

952 953 954 955
	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);

956 957
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
			    uint32_t depth)
958 959
{
	info->fix.type = FB_TYPE_PACKED_PIXELS;
960
	info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
961
		FB_VISUAL_TRUECOLOR;
962 963 964 965
	info->fix.type_aux = 0;
	info->fix.xpanstep = 1; /* doing it in hw */
	info->fix.ypanstep = 1; /* doing it in hw */
	info->fix.ywrapstep = 0;
966
	info->fix.accel = FB_ACCEL_NONE;
967 968 969 970 971 972 973
	info->fix.type_aux = 0;

	info->fix.line_length = pitch;
	return;
}
EXPORT_SYMBOL(drm_fb_helper_fill_fix);

974
void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
975 976
			    uint32_t fb_width, uint32_t fb_height)
{
977 978
	struct drm_framebuffer *fb = fb_helper->fb;
	info->pseudo_palette = fb_helper->pseudo_palette;
979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
	info->var.xres_virtual = fb->width;
	info->var.yres_virtual = fb->height;
	info->var.bits_per_pixel = fb->bits_per_pixel;
	info->var.xoffset = 0;
	info->var.yoffset = 0;
	info->var.activate = FB_ACTIVATE_NOW;
	info->var.height = -1;
	info->var.width = -1;

	switch (fb->depth) {
	case 8:
		info->var.red.offset = 0;
		info->var.green.offset = 0;
		info->var.blue.offset = 0;
		info->var.red.length = 8; /* 8bit DAC */
		info->var.green.length = 8;
		info->var.blue.length = 8;
		info->var.transp.offset = 0;
		info->var.transp.length = 0;
		break;
	case 15:
		info->var.red.offset = 10;
		info->var.green.offset = 5;
		info->var.blue.offset = 0;
		info->var.red.length = 5;
		info->var.green.length = 5;
		info->var.blue.length = 5;
		info->var.transp.offset = 15;
		info->var.transp.length = 1;
		break;
	case 16:
		info->var.red.offset = 11;
		info->var.green.offset = 5;
		info->var.blue.offset = 0;
		info->var.red.length = 5;
		info->var.green.length = 6;
		info->var.blue.length = 5;
		info->var.transp.offset = 0;
		break;
	case 24:
		info->var.red.offset = 16;
		info->var.green.offset = 8;
		info->var.blue.offset = 0;
		info->var.red.length = 8;
		info->var.green.length = 8;
		info->var.blue.length = 8;
		info->var.transp.offset = 0;
		info->var.transp.length = 0;
		break;
	case 32:
		info->var.red.offset = 16;
		info->var.green.offset = 8;
		info->var.blue.offset = 0;
		info->var.red.length = 8;
		info->var.green.length = 8;
		info->var.blue.length = 8;
		info->var.transp.offset = 24;
		info->var.transp.length = 8;
		break;
	default:
		break;
	}

	info->var.xres = fb_width;
	info->var.yres = fb_height;
}
EXPORT_SYMBOL(drm_fb_helper_fill_var);
1046

1047 1048 1049
static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
					       uint32_t maxX,
					       uint32_t maxY)
1050 1051 1052
{
	struct drm_connector *connector;
	int count = 0;
1053
	int i;
1054

1055 1056
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
1057 1058 1059 1060 1061 1062
		count += connector->funcs->fill_modes(connector, maxX, maxY);
	}

	return count;
}

1063
static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1064 1065 1066
{
	struct drm_display_mode *mode;

1067
	list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1068 1069 1070 1071 1072 1073 1074 1075 1076
		if (drm_mode_width(mode) > width ||
		    drm_mode_height(mode) > height)
			continue;
		if (mode->type & DRM_MODE_TYPE_PREFERRED)
			return mode;
	}
	return NULL;
}

1077
static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1078 1079
{
	struct drm_fb_helper_cmdline_mode *cmdline_mode;
1080
	cmdline_mode = &fb_connector->cmdline_mode;
1081 1082 1083
	return cmdline_mode->specified;
}

1084 1085
static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
						      int width, int height)
1086 1087 1088 1089
{
	struct drm_fb_helper_cmdline_mode *cmdline_mode;
	struct drm_display_mode *mode = NULL;

1090
	cmdline_mode = &fb_helper_conn->cmdline_mode;
1091 1092 1093 1094 1095 1096 1097 1098 1099
	if (cmdline_mode->specified == false)
		return mode;

	/* attempt to find a matching mode in the list of modes
	 *  we have gotten so far, if not add a CVT mode that conforms
	 */
	if (cmdline_mode->rb || cmdline_mode->margins)
		goto create_mode;

1100
	list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118
		/* check width/height */
		if (mode->hdisplay != cmdline_mode->xres ||
		    mode->vdisplay != cmdline_mode->yres)
			continue;

		if (cmdline_mode->refresh_specified) {
			if (mode->vrefresh != cmdline_mode->refresh)
				continue;
		}

		if (cmdline_mode->interlace) {
			if (!(mode->flags & DRM_MODE_FLAG_INTERLACE))
				continue;
		}
		return mode;
	}

create_mode:
1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
	if (cmdline_mode->cvt)
		mode = drm_cvt_mode(fb_helper_conn->connector->dev,
				    cmdline_mode->xres, cmdline_mode->yres,
				    cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
				    cmdline_mode->rb, cmdline_mode->interlace,
				    cmdline_mode->margins);
	else
		mode = drm_gtf_mode(fb_helper_conn->connector->dev,
				    cmdline_mode->xres, cmdline_mode->yres,
				    cmdline_mode->refresh_specified ? cmdline_mode->refresh : 60,
				    cmdline_mode->interlace,
				    cmdline_mode->margins);
1131
	drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1132
	list_add(&mode->head, &fb_helper_conn->connector->modes);
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
	return mode;
}

static bool drm_connector_enabled(struct drm_connector *connector, bool strict)
{
	bool enable;

	if (strict) {
		enable = connector->status == connector_status_connected;
	} else {
		enable = connector->status != connector_status_disconnected;
	}
	return enable;
}

1148 1149
static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
				  bool *enabled)
1150 1151 1152 1153 1154
{
	bool any_enabled = false;
	struct drm_connector *connector;
	int i = 0;

1155 1156
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
1157 1158 1159 1160 1161 1162 1163 1164 1165
		enabled[i] = drm_connector_enabled(connector, true);
		DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id,
			  enabled[i] ? "yes" : "no");
		any_enabled |= enabled[i];
	}

	if (any_enabled)
		return;

1166 1167
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
1168 1169 1170 1171
		enabled[i] = drm_connector_enabled(connector, false);
	}
}

D
Dave Airlie 已提交
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244
static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
			      struct drm_display_mode **modes,
			      bool *enabled, int width, int height)
{
	int count, i, j;
	bool can_clone = false;
	struct drm_fb_helper_connector *fb_helper_conn;
	struct drm_display_mode *dmt_mode, *mode;

	/* only contemplate cloning in the single crtc case */
	if (fb_helper->crtc_count > 1)
		return false;

	count = 0;
	for (i = 0; i < fb_helper->connector_count; i++) {
		if (enabled[i])
			count++;
	}

	/* only contemplate cloning if more than one connector is enabled */
	if (count <= 1)
		return false;

	/* check the command line or if nothing common pick 1024x768 */
	can_clone = true;
	for (i = 0; i < fb_helper->connector_count; i++) {
		if (!enabled[i])
			continue;
		fb_helper_conn = fb_helper->connector_info[i];
		modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
		if (!modes[i]) {
			can_clone = false;
			break;
		}
		for (j = 0; j < i; j++) {
			if (!enabled[j])
				continue;
			if (!drm_mode_equal(modes[j], modes[i]))
				can_clone = false;
		}
	}

	if (can_clone) {
		DRM_DEBUG_KMS("can clone using command line\n");
		return true;
	}

	/* try and find a 1024x768 mode on each connector */
	can_clone = true;
	dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60);

	for (i = 0; i < fb_helper->connector_count; i++) {

		if (!enabled[i])
			continue;

		fb_helper_conn = fb_helper->connector_info[i];
		list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
			if (drm_mode_equal(mode, dmt_mode))
				modes[i] = mode;
		}
		if (!modes[i])
			can_clone = false;
	}

	if (can_clone) {
		DRM_DEBUG_KMS("can clone using 1024x768\n");
		return true;
	}
	DRM_INFO("kms: can't enable cloning when we probably wanted to.\n");
	return false;
}

1245
static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1246 1247 1248
				 struct drm_display_mode **modes,
				 bool *enabled, int width, int height)
{
1249 1250
	struct drm_fb_helper_connector *fb_helper_conn;
	int i;
1251

1252 1253
	for (i = 0; i < fb_helper->connector_count; i++) {
		fb_helper_conn = fb_helper->connector_info[i];
1254

1255
		if (enabled[i] == false)
1256 1257 1258
			continue;

		DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1259
			      fb_helper_conn->connector->base.id);
1260 1261

		/* got for command line mode first */
1262
		modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1263 1264
		if (!modes[i]) {
			DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1265 1266
				      fb_helper_conn->connector->base.id);
			modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1267 1268
		}
		/* No preferred modes, pick one off the list */
1269 1270
		if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
			list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1271 1272 1273 1274 1275 1276 1277 1278
				break;
		}
		DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
			  "none");
	}
	return true;
}

1279 1280
static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
			  struct drm_fb_helper_crtc **best_crtcs,
1281 1282 1283 1284
			  struct drm_display_mode **modes,
			  int n, int width, int height)
{
	int c, o;
1285
	struct drm_device *dev = fb_helper->dev;
1286 1287 1288
	struct drm_connector *connector;
	struct drm_connector_helper_funcs *connector_funcs;
	struct drm_encoder *encoder;
1289
	struct drm_fb_helper_crtc *best_crtc;
1290
	int my_score, best_score, score;
1291
	struct drm_fb_helper_crtc **crtcs, *crtc;
1292
	struct drm_fb_helper_connector *fb_helper_conn;
1293

1294
	if (n == fb_helper->connector_count)
1295
		return 0;
1296 1297 1298

	fb_helper_conn = fb_helper->connector_info[n];
	connector = fb_helper_conn->connector;
1299 1300 1301

	best_crtcs[n] = NULL;
	best_crtc = NULL;
1302
	best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1303 1304 1305
	if (modes[n] == NULL)
		return best_score;

1306 1307
	crtcs = kzalloc(dev->mode_config.num_connector *
			sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1308 1309 1310 1311 1312 1313
	if (!crtcs)
		return best_score;

	my_score = 1;
	if (connector->status == connector_status_connected)
		my_score++;
1314
	if (drm_has_cmdline_mode(fb_helper_conn))
1315
		my_score++;
1316
	if (drm_has_preferred_mode(fb_helper_conn, width, height))
1317 1318 1319 1320 1321 1322 1323 1324 1325
		my_score++;

	connector_funcs = connector->helper_private;
	encoder = connector_funcs->best_encoder(connector);
	if (!encoder)
		goto out;

	/* select a crtc for this connector and then attempt to configure
	   remaining connectors */
1326 1327
	for (c = 0; c < fb_helper->crtc_count; c++) {
		crtc = &fb_helper->crtc_info[c];
1328 1329 1330 1331 1332 1333 1334 1335 1336 1337

		if ((encoder->possible_crtcs & (1 << c)) == 0) {
			continue;
		}

		for (o = 0; o < n; o++)
			if (best_crtcs[o] == crtc)
				break;

		if (o < n) {
D
Dave Airlie 已提交
1338 1339 1340 1341 1342 1343
			/* ignore cloning unless only a single crtc */
			if (fb_helper->crtc_count > 1)
				continue;

			if (!drm_mode_equal(modes[o], modes[n]))
				continue;
1344 1345 1346
		}

		crtcs[n] = crtc;
1347 1348
		memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
		score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1349 1350 1351 1352 1353 1354
						  width, height);
		if (score > best_score) {
			best_crtc = crtc;
			best_score = score;
			memcpy(best_crtcs, crtcs,
			       dev->mode_config.num_connector *
1355
			       sizeof(struct drm_fb_helper_crtc *));
1356 1357 1358 1359 1360 1361 1362
		}
	}
out:
	kfree(crtcs);
	return best_score;
}

1363
static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1364
{
1365 1366
	struct drm_device *dev = fb_helper->dev;
	struct drm_fb_helper_crtc **crtcs;
1367 1368
	struct drm_display_mode **modes;
	struct drm_encoder *encoder;
1369
	struct drm_mode_set *modeset;
1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
	bool *enabled;
	int width, height;
	int i, ret;

	DRM_DEBUG_KMS("\n");

	width = dev->mode_config.max_width;
	height = dev->mode_config.max_height;

	/* clean out all the encoder/crtc combos */
	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
		encoder->crtc = NULL;
	}

	crtcs = kcalloc(dev->mode_config.num_connector,
1385
			sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1386 1387 1388 1389 1390
	modes = kcalloc(dev->mode_config.num_connector,
			sizeof(struct drm_display_mode *), GFP_KERNEL);
	enabled = kcalloc(dev->mode_config.num_connector,
			  sizeof(bool), GFP_KERNEL);

1391
	drm_enable_connectors(fb_helper, enabled);
1392

D
Dave Airlie 已提交
1393 1394 1395 1396 1397 1398
	ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
	if (!ret) {
		ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
		if (!ret)
			DRM_ERROR("Unable to find initial modes\n");
	}
1399 1400 1401

	DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);

1402 1403 1404 1405 1406 1407 1408 1409
	drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height);

	/* need to set the modesets up here for use later */
	/* fill out the connector<->crtc mappings into the modesets */
	for (i = 0; i < fb_helper->crtc_count; i++) {
		modeset = &fb_helper->crtc_info[i].mode_set;
		modeset->num_connectors = 0;
	}
1410

1411
	for (i = 0; i < fb_helper->connector_count; i++) {
1412
		struct drm_display_mode *mode = modes[i];
1413 1414
		struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
		modeset = &fb_crtc->mode_set;
1415

1416
		if (mode && fb_crtc) {
1417
			DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1418 1419 1420 1421 1422 1423
				      mode->name, fb_crtc->mode_set.crtc->base.id);
			fb_crtc->desired_mode = mode;
			if (modeset->mode)
				drm_mode_destroy(dev, modeset->mode);
			modeset->mode = drm_mode_duplicate(dev,
							   fb_crtc->desired_mode);
1424
			modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446
		}
	}

	kfree(crtcs);
	kfree(modes);
	kfree(enabled);
}

/**
 * drm_helper_initial_config - setup a sane initial connector configuration
 * @dev: DRM device
 *
 * LOCKING:
 * Called at init time, must take mode config lock.
 *
 * Scan the CRTCs and connectors and try to put together an initial setup.
 * At the moment, this is a cloned configuration across all heads with
 * a new framebuffer object as the backing store.
 *
 * RETURNS:
 * Zero if everything went ok, nonzero otherwise.
 */
1447
bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1448
{
1449
	struct drm_device *dev = fb_helper->dev;
1450 1451 1452
	int count = 0;

	/* disable all the possible outputs/crtcs before entering KMS mode */
1453
	drm_helper_disable_unused_functions(fb_helper->dev);
1454

1455
	drm_fb_helper_parse_command_line(fb_helper);
1456

1457 1458 1459
	count = drm_fb_helper_probe_connector_modes(fb_helper,
						    dev->mode_config.max_width,
						    dev->mode_config.max_height);
1460 1461 1462
	/*
	 * we shouldn't end up with no modes here.
	 */
1463
	if (count == 0) {
1464
		printk(KERN_INFO "No connectors reported connected with modes\n");
1465
	}
1466
	drm_setup_crtcs(fb_helper);
1467

1468
	return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1469
}
1470
EXPORT_SYMBOL(drm_fb_helper_initial_config);
1471

1472
bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1473
{
1474
	int count = 0;
1475 1476 1477
	u32 max_width, max_height, bpp_sel;
	bool bound = false, crtcs_bound = false;
	struct drm_crtc *crtc;
1478

1479 1480
	if (!fb_helper->fb)
		return false;
1481 1482 1483 1484 1485 1486 1487 1488

	list_for_each_entry(crtc, &fb_helper->dev->mode_config.crtc_list, head) {
		if (crtc->fb)
			crtcs_bound = true;
		if (crtc->fb == fb_helper->fb)
			bound = true;
	}

1489
	if (!bound && crtcs_bound) {
1490
		fb_helper->delayed_hotplug = true;
1491
		return false;
1492
	}
1493
	DRM_DEBUG_KMS("\n");
1494

1495 1496 1497
	max_width = fb_helper->fb->width;
	max_height = fb_helper->fb->height;
	bpp_sel = fb_helper->fb->bits_per_pixel;
1498

1499 1500 1501
	count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
						    max_height);
	drm_setup_crtcs(fb_helper);
1502

1503
	return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1504
}
1505
EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
1506