drm_fb_helper.c 40.6 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;
}

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static void drm_fb_helper_save_lut_atomic(struct drm_crtc *crtc, struct drm_fb_helper *helper)
{
	uint16_t *r_base, *g_base, *b_base;
	int i;

	r_base = crtc->gamma_store;
	g_base = r_base + crtc->gamma_size;
	b_base = g_base + crtc->gamma_size;

	for (i = 0; i < crtc->gamma_size; i++)
		helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
}

static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
{
	uint16_t *r_base, *g_base, *b_base;

	r_base = crtc->gamma_store;
	g_base = r_base + crtc->gamma_size;
	b_base = g_base + crtc->gamma_size;

	crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
}

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

	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;
		}

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

	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;
	}

634 635 636 637 638 639
	pindex = regno;

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

		if (fb->depth == 16 && regno > 63)
640
			return -EINVAL;
641
		if (fb->depth == 15 && regno > 31)
642
			return -EINVAL;
643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665

		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);
666
	return 0;
667 668
}

669 670 671
int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
{
	struct drm_fb_helper *fb_helper = info->par;
672
	struct drm_crtc_helper_funcs *crtc_funcs;
673 674 675 676 677
	u16 *red, *green, *blue, *transp;
	struct drm_crtc *crtc;
	int i, rc = 0;
	int start;

678 679 680
	for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
		crtc_funcs = crtc->helper_private;
681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697

		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++;

698 699 700
			rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
			if (rc)
				return rc;
701 702 703 704 705 706 707
		}
		crtc_funcs->load_lut(crtc);
	}
	return rc;
}
EXPORT_SYMBOL(drm_fb_helper_setcmap);

708 709 710 711 712 713 714
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;

715
	if (var->pixclock != 0 || in_dbg_master())
716 717 718
		return -EINVAL;

	/* Need to resize the fb object !!! */
719 720 721 722
	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);
723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805
		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;

806
	if (var->pixclock != 0) {
P
Pavel Roskin 已提交
807
		DRM_ERROR("PIXEL CLOCK SET\n");
808 809 810
		return -EINVAL;
	}

811 812 813
	mutex_lock(&dev->mode_config.mutex);
	for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
814 815
		ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
		if (ret) {
816
			mutex_unlock(&dev->mode_config.mutex);
817
			return ret;
818 819
		}
	}
820
	mutex_unlock(&dev->mode_config.mutex);
821 822 823

	if (fb_helper->delayed_hotplug) {
		fb_helper->delayed_hotplug = false;
824
		drm_fb_helper_hotplug_event(fb_helper);
825
	}
826 827 828 829 830 831 832 833 834 835 836 837 838 839
	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;

840 841 842
	mutex_lock(&dev->mode_config.mutex);
	for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
843 844 845 846 847 848 849 850 851 852 853 854 855 856

		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;
			}
		}
	}
857
	mutex_unlock(&dev->mode_config.mutex);
858 859 860 861
	return ret;
}
EXPORT_SYMBOL(drm_fb_helper_pan_display);

862 863
int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
				  int preferred_bpp)
864 865 866
{
	int new_fb = 0;
	int crtc_count = 0;
867
	int i;
868
	struct fb_info *info;
869
	struct drm_fb_helper_surface_size sizes;
870
	int gamma_size = 0;
871 872 873 874 875 876

	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;
877

878 879
	/* if driver picks 8 or 16 by default use that
	   for both depth/bpp */
880 881
	if (preferred_bpp != sizes.surface_bpp) {
		sizes.surface_depth = sizes.surface_bpp = preferred_bpp;
882
	}
883
	/* first up get a count of crtcs now in use and new min/maxes width/heights */
884 885
	for (i = 0; i < fb_helper->connector_count; i++) {
		struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i];
886 887
		struct drm_fb_helper_cmdline_mode *cmdline_mode;

888
		cmdline_mode = &fb_helper_conn->cmdline_mode;
889 890 891 892

		if (cmdline_mode->bpp_specified) {
			switch (cmdline_mode->bpp) {
			case 8:
893
				sizes.surface_depth = sizes.surface_bpp = 8;
894 895
				break;
			case 15:
896 897
				sizes.surface_depth = 15;
				sizes.surface_bpp = 16;
898 899
				break;
			case 16:
900
				sizes.surface_depth = sizes.surface_bpp = 16;
901 902
				break;
			case 24:
903
				sizes.surface_depth = sizes.surface_bpp = 24;
904 905
				break;
			case 32:
906 907
				sizes.surface_depth = 24;
				sizes.surface_bpp = 32;
908 909 910 911 912 913
				break;
			}
			break;
		}
	}

914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929
	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;
930 931 932 933
			crtc_count++;
		}
	}

934
	if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
935 936
		/* hmm everyone went away - assume VGA cable just fell out
		   and will come back later. */
937
		DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
938 939
		sizes.fb_width = sizes.surface_width = 1024;
		sizes.fb_height = sizes.surface_height = 768;
940 941
	}

942
	/* push down into drivers */
943
	new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
944 945
	if (new_fb < 0)
		return new_fb;
946

947
	info = fb_helper->fbdev;
948

949 950 951
	/* set the fb pointer */
	for (i = 0; i < fb_helper->crtc_count; i++) {
		fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
952 953 954
	}

	if (new_fb) {
955
		info->var.pixclock = 0;
956
		if (register_framebuffer(info) < 0) {
957
			return -EINVAL;
958
		}
959 960 961 962

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

963 964 965 966 967 968 969
	} 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)) {
970
		printk(KERN_INFO "drm: registered panic notifier\n");
971 972 973 974
		atomic_notifier_chain_register(&panic_notifier_list,
					       &paniced);
		register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op);
	}
975 976 977
	if (new_fb)
		list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);

978 979 980 981
	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);

982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001
void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
			    uint32_t depth)
{
	info->fix.type = FB_TYPE_PACKED_PIXELS;
	info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR :
		FB_VISUAL_TRUECOLOR;
	info->fix.mmio_start = 0;
	info->fix.mmio_len = 0;
	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;
	info->fix.accel = FB_ACCEL_NONE;
	info->fix.type_aux = 0;

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

1002
void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
1003 1004
			    uint32_t fb_width, uint32_t fb_height)
{
1005 1006
	struct drm_framebuffer *fb = fb_helper->fb;
	info->pseudo_palette = fb_helper->pseudo_palette;
1007 1008 1009
	info->var.xres_virtual = fb->width;
	info->var.yres_virtual = fb->height;
	info->var.bits_per_pixel = fb->bits_per_pixel;
1010
	info->var.accel_flags = FB_ACCELF_TEXT;
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 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
	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);
1075

1076 1077 1078
static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
					       uint32_t maxX,
					       uint32_t maxY)
1079 1080 1081
{
	struct drm_connector *connector;
	int count = 0;
1082
	int i;
1083

1084 1085
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
1086 1087 1088 1089 1090 1091
		count += connector->funcs->fill_modes(connector, maxX, maxY);
	}

	return count;
}

1092
static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
1093 1094 1095
{
	struct drm_display_mode *mode;

1096
	list_for_each_entry(mode, &fb_connector->connector->modes, head) {
1097 1098 1099 1100 1101 1102 1103 1104 1105
		if (drm_mode_width(mode) > width ||
		    drm_mode_height(mode) > height)
			continue;
		if (mode->type & DRM_MODE_TYPE_PREFERRED)
			return mode;
	}
	return NULL;
}

1106
static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
1107 1108
{
	struct drm_fb_helper_cmdline_mode *cmdline_mode;
1109
	cmdline_mode = &fb_connector->cmdline_mode;
1110 1111 1112
	return cmdline_mode->specified;
}

1113 1114
static struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
						      int width, int height)
1115 1116 1117 1118
{
	struct drm_fb_helper_cmdline_mode *cmdline_mode;
	struct drm_display_mode *mode = NULL;

1119
	cmdline_mode = &fb_helper_conn->cmdline_mode;
1120 1121 1122 1123 1124 1125 1126 1127 1128
	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;

1129
	list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
		/* 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:
1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159
	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);
1160
	drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
1161
	list_add(&mode->head, &fb_helper_conn->connector->modes);
1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176
	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;
}

1177 1178
static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
				  bool *enabled)
1179 1180 1181 1182 1183
{
	bool any_enabled = false;
	struct drm_connector *connector;
	int i = 0;

1184 1185
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
1186 1187 1188 1189 1190 1191 1192 1193 1194
		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;

1195 1196
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
1197 1198 1199 1200
		enabled[i] = drm_connector_enabled(connector, false);
	}
}

D
Dave Airlie 已提交
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 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273
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;
}

1274
static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
1275 1276 1277
				 struct drm_display_mode **modes,
				 bool *enabled, int width, int height)
{
1278 1279
	struct drm_fb_helper_connector *fb_helper_conn;
	int i;
1280

1281 1282
	for (i = 0; i < fb_helper->connector_count; i++) {
		fb_helper_conn = fb_helper->connector_info[i];
1283

1284
		if (enabled[i] == false)
1285 1286 1287
			continue;

		DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
1288
			      fb_helper_conn->connector->base.id);
1289 1290

		/* got for command line mode first */
1291
		modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
1292 1293
		if (!modes[i]) {
			DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
1294 1295
				      fb_helper_conn->connector->base.id);
			modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
1296 1297
		}
		/* No preferred modes, pick one off the list */
1298 1299
		if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
			list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
1300 1301 1302 1303 1304 1305 1306 1307
				break;
		}
		DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
			  "none");
	}
	return true;
}

1308 1309
static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
			  struct drm_fb_helper_crtc **best_crtcs,
1310 1311 1312 1313
			  struct drm_display_mode **modes,
			  int n, int width, int height)
{
	int c, o;
1314
	struct drm_device *dev = fb_helper->dev;
1315 1316 1317
	struct drm_connector *connector;
	struct drm_connector_helper_funcs *connector_funcs;
	struct drm_encoder *encoder;
1318
	struct drm_fb_helper_crtc *best_crtc;
1319
	int my_score, best_score, score;
1320
	struct drm_fb_helper_crtc **crtcs, *crtc;
1321
	struct drm_fb_helper_connector *fb_helper_conn;
1322

1323
	if (n == fb_helper->connector_count)
1324
		return 0;
1325 1326 1327

	fb_helper_conn = fb_helper->connector_info[n];
	connector = fb_helper_conn->connector;
1328 1329 1330

	best_crtcs[n] = NULL;
	best_crtc = NULL;
1331
	best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
1332 1333 1334
	if (modes[n] == NULL)
		return best_score;

1335 1336
	crtcs = kzalloc(dev->mode_config.num_connector *
			sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1337 1338 1339 1340 1341 1342
	if (!crtcs)
		return best_score;

	my_score = 1;
	if (connector->status == connector_status_connected)
		my_score++;
1343
	if (drm_has_cmdline_mode(fb_helper_conn))
1344
		my_score++;
1345
	if (drm_has_preferred_mode(fb_helper_conn, width, height))
1346 1347 1348 1349 1350 1351 1352 1353 1354
		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 */
1355 1356
	for (c = 0; c < fb_helper->crtc_count; c++) {
		crtc = &fb_helper->crtc_info[c];
1357 1358 1359 1360 1361 1362 1363 1364 1365 1366

		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
1367 1368 1369 1370 1371 1372
			/* ignore cloning unless only a single crtc */
			if (fb_helper->crtc_count > 1)
				continue;

			if (!drm_mode_equal(modes[o], modes[n]))
				continue;
1373 1374 1375
		}

		crtcs[n] = crtc;
1376 1377
		memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
		score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
1378 1379 1380 1381 1382 1383
						  width, height);
		if (score > best_score) {
			best_crtc = crtc;
			best_score = score;
			memcpy(best_crtcs, crtcs,
			       dev->mode_config.num_connector *
1384
			       sizeof(struct drm_fb_helper_crtc *));
1385 1386 1387 1388 1389 1390 1391
		}
	}
out:
	kfree(crtcs);
	return best_score;
}

1392
static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
1393
{
1394 1395
	struct drm_device *dev = fb_helper->dev;
	struct drm_fb_helper_crtc **crtcs;
1396 1397
	struct drm_display_mode **modes;
	struct drm_encoder *encoder;
1398
	struct drm_mode_set *modeset;
1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413
	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,
1414
			sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
1415 1416 1417 1418 1419
	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);

1420
	drm_enable_connectors(fb_helper, enabled);
1421

D
Dave Airlie 已提交
1422 1423 1424 1425 1426 1427
	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");
	}
1428 1429 1430

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

1431 1432 1433 1434 1435 1436 1437 1438
	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;
	}
1439

1440
	for (i = 0; i < fb_helper->connector_count; i++) {
1441
		struct drm_display_mode *mode = modes[i];
1442 1443
		struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
		modeset = &fb_crtc->mode_set;
1444

1445
		if (mode && fb_crtc) {
1446
			DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
1447 1448 1449 1450 1451 1452
				      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);
1453
			modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475
		}
	}

	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.
 */
1476
bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
1477
{
1478
	struct drm_device *dev = fb_helper->dev;
1479 1480 1481
	int count = 0;

	/* disable all the possible outputs/crtcs before entering KMS mode */
1482
	drm_helper_disable_unused_functions(fb_helper->dev);
1483

1484
	drm_fb_helper_parse_command_line(fb_helper);
1485

1486 1487 1488
	count = drm_fb_helper_probe_connector_modes(fb_helper,
						    dev->mode_config.max_width,
						    dev->mode_config.max_height);
1489 1490 1491
	/*
	 * we shouldn't end up with no modes here.
	 */
1492
	if (count == 0) {
1493
		printk(KERN_INFO "No connectors reported connected with modes\n");
1494
	}
1495
	drm_setup_crtcs(fb_helper);
1496

1497
	return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1498
}
1499
EXPORT_SYMBOL(drm_fb_helper_initial_config);
1500

1501
bool drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
1502
{
1503
	int count = 0;
1504 1505 1506
	u32 max_width, max_height, bpp_sel;
	bool bound = false, crtcs_bound = false;
	struct drm_crtc *crtc;
1507

1508 1509
	if (!fb_helper->fb)
		return false;
1510 1511 1512 1513 1514 1515 1516 1517

	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;
	}

1518
	if (!bound && crtcs_bound) {
1519
		fb_helper->delayed_hotplug = true;
1520
		return false;
1521
	}
1522
	DRM_DEBUG_KMS("\n");
1523

1524 1525 1526
	max_width = fb_helper->fb->width;
	max_height = fb_helper->fb->height;
	bpp_sel = fb_helper->fb->bits_per_pixel;
1527

1528 1529 1530
	count = drm_fb_helper_probe_connector_modes(fb_helper, max_width,
						    max_height);
	drm_setup_crtcs(fb_helper);
1531

1532
	return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
1533
}
1534
EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
1535

1536
/* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT)
1537 1538 1539
 * but the module doesn't depend on any fb console symbols.  At least
 * attempt to load fbcon to avoid leaving the system without a usable console.
 */
1540
#if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT)
1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556
static int __init drm_fb_helper_modinit(void)
{
	const char *name = "fbcon";
	struct module *fbcon;

	mutex_lock(&module_mutex);
	fbcon = find_module(name);
	mutex_unlock(&module_mutex);

	if (!fbcon)
		request_module_nowait(name);
	return 0;
}

module_init(drm_fb_helper_modinit);
#endif