WebSVN – Kolibri OS – Diff – /drivers/video/drm/drm_fb_helper.c


/*
 * Copyright (c) 2006-2009 Red Hat Inc.
 * Copyright (c) 2006-2008 Intel Corporation
 * Copyright (c) 2007 Dave Airlie 
 *
 * 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 
 *      Jesse Barnes 
 */
#include 
#include 
#include 
#include 
#include "drmP.h"
#include "drm_crtc.h"
#include "drm_fb_helper.h"
#include "drm_crtc_helper.h"
 
MODULE_AUTHOR("David Airlie, Jesse Barnes");
MODULE_DESCRIPTION("DRM KMS helper");
MODULE_LICENSE("GPL and additional rights");
 
static LIST_HEAD(kernel_fb_helper_list);
 
/* simple single crtc case helper function */
int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
{
	struct drm_device *dev = fb_helper->dev;
	struct drm_connector *connector;
	int i;
 
	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;
 
		fb_helper_connector->connector = connector;
		fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
	}
	return 0;
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;
}
EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
 
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);
}
 
 
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;
	struct drm_crtc_helper_funcs *crtc_funcs;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	int i, j;
 
	/*
	 * For each CRTC in this fb, turn the crtc on then,
	 * find all associated encoders and turn them on.
	 */
	mutex_lock(&dev->mode_config.mutex);
	for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
		crtc_funcs = crtc->helper_private;
 
		if (!crtc->enabled)
				continue;
 
			crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
 
		/* 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);
		}
			/* 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;
 
					encoder_funcs = encoder->helper_private;
					encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
			}
		}
	}
	mutex_unlock(&dev->mode_config.mutex);
}
 
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;
	struct drm_crtc_helper_funcs *crtc_funcs;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	int i, j;
 
	/*
	 * For each CRTC in this fb, find all associated encoders
	 * and turn them off, then turn off the CRTC.
	 */
	mutex_lock(&dev->mode_config.mutex);
	for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
		crtc_funcs = crtc->helper_private;
 
		if (!crtc->enabled)
				continue;
 
		/* 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);
		}
			/* 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;
 
					encoder_funcs = encoder->helper_private;
					encoder_funcs->dpms(encoder, dpms_mode);
				}
			}
			    crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
	}
				mutex_unlock(&dev->mode_config.mutex);
}
 
int drm_fb_helper_blank(int blank, struct fb_info *info)
{
	switch (blank) {
	/* Display: On; HSync: On, VSync: On */
	case FB_BLANK_UNBLANK:
		drm_fb_helper_on(info);
		break;
	/* Display: Off; HSync: On, VSync: On */
	case FB_BLANK_NORMAL:
		drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
		break;
	/* Display: Off; HSync: Off, VSync: On */
	case FB_BLANK_HSYNC_SUSPEND:
		drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
		break;
	/* Display: Off; HSync: On, VSync: Off */
	case FB_BLANK_VSYNC_SUSPEND:
		drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
		break;
	/* Display: Off; HSync: Off, VSync: Off */
	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;
 
	for (i = 0; i < helper->connector_count; i++)
		kfree(helper->connector_info[i]);
	kfree(helper->connector_info);
	for (i = 0; i < helper->crtc_count; i++)
		kfree(helper->crtc_info[i].mode_set.connectors);
	kfree(helper->crtc_info);
}
 
int drm_fb_helper_init(struct drm_device *dev,
		       struct drm_fb_helper *fb_helper,
		       int crtc_count, int max_conn_count)
{
	struct drm_crtc *crtc;
	int ret = 0;
	int i;
 
	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)
		return -ENOMEM;
 
	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);
		return -ENOMEM;
	}
	fb_helper->connector_count = 0;
 
	for (i = 0; i < crtc_count; i++) {
		fb_helper->crtc_info[i].mode_set.connectors =
			kcalloc(max_conn_count,
				sizeof(struct drm_connector *),
				GFP_KERNEL);
 
		if (!fb_helper->crtc_info[i].mode_set.connectors) {
			ret = -ENOMEM;
			goto out_free;
		}
		fb_helper->crtc_info[i].mode_set.num_connectors = 0;
	}
 
	i = 0;
	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
		fb_helper->crtc_info[i].crtc_id = crtc->base.id;
		fb_helper->crtc_info[i].mode_set.crtc = crtc;
		i++;
	}
	fb_helper->conn_limit = max_conn_count;
	return 0;
out_free:
	drm_fb_helper_crtc_free(fb_helper);
	return -ENOMEM;
}
EXPORT_SYMBOL(drm_fb_helper_init);
 
static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
		     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;
 
	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);
		if (info->var.transp.length > 0) {
			u32 mask = (1 << info->var.transp.length) - 1;
			mask <<= info->var.transp.offset;
			value |= mask;
		}
		palette[regno] = value;
		return 0;
	}
 
	pindex = regno;
 
	if (fb->bits_per_pixel == 16) {
		pindex = regno << 3;
 
		if (fb->depth == 16 && regno > 63)
			return -EINVAL;
		if (fb->depth == 15 && regno > 31)
			return -EINVAL;
 
		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);
	return 0;
}
 
int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info)
{
	struct drm_fb_helper *fb_helper = info->par;
	struct drm_crtc_helper_funcs *crtc_funcs;
	u16 *red, *green, *blue, *transp;
	struct drm_crtc *crtc;
	int i, j, rc = 0;
	int start;
 
		for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
		crtc_funcs = crtc->helper_private;
 
		red = cmap->red;
		green = cmap->green;
		blue = cmap->blue;
		transp = cmap->transp;
		start = cmap->start;
 
		for (j = 0; j < cmap->len; j++) {
			u16 hred, hgreen, hblue, htransp = 0xffff;
 
			hred = *red++;
			hgreen = *green++;
			hblue = *blue++;
 
			if (transp)
				htransp = *transp++;
 
			rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
			if (rc)
				return rc;
		}
		crtc_funcs->load_lut(crtc);
	}
	return rc;
}
EXPORT_SYMBOL(drm_fb_helper_setcmap);
 
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;
 
	if (var->pixclock != 0 || in_dbg_master())
		return -EINVAL;
 
	/* Need to resize the fb object !!! */
	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);
		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;
 
	if (var->pixclock != 0) {
		DRM_ERROR("PIXEL CLOCK SET\n");
		return -EINVAL;
	}
 
	mutex_lock(&dev->mode_config.mutex);
		for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
			ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
		if (ret) {
			mutex_unlock(&dev->mode_config.mutex);
				return ret;
		}
	}
	mutex_unlock(&dev->mode_config.mutex);
 
	if (fb_helper->delayed_hotplug) {
		fb_helper->delayed_hotplug = false;
//       drm_fb_helper_hotplug_event(fb_helper);
	}
	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;
 
	mutex_lock(&dev->mode_config.mutex);
		for (i = 0; i < fb_helper->crtc_count; i++) {
		crtc = fb_helper->crtc_info[i].mode_set.crtc;
 
		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;
			}
		}
	}
	mutex_unlock(&dev->mode_config.mutex);
	return ret;
}
EXPORT_SYMBOL(drm_fb_helper_pan_display);
 
int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,
				  int preferred_bpp)
{
	int new_fb = 0;
	int crtc_count = 0;
	int i;
	struct fb_info *info;
	struct drm_fb_helper_surface_size sizes;
	int gamma_size = 0;
 
	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;
 
    sizes.surface_depth = 24;
    sizes.surface_bpp = 32;
 
	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;
			crtc_count++;
		}
	}
 
	if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) {
		/* hmm everyone went away - assume VGA cable just fell out
		   and will come back later. */
		DRM_INFO("Cannot find any crtc or sizes - going 1024x768\n");
		sizes.fb_width = sizes.surface_width = 1024;
		sizes.fb_height = sizes.surface_height = 768;
	}
 
	/* push down into drivers */
 
    DRM_INFO("enter fb probe\n");
 
 
    new_fb = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes);
	if (new_fb < 0)
		return new_fb;
 
	info = fb_helper->fbdev;
 
 
 
	/* set the fb pointer */
	for (i = 0; i < fb_helper->crtc_count; i++) {
		fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb;
		}
 
	if (new_fb) {
		info->var.pixclock = 0;
 
		printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
		       info->fix.id);
 
	} else {
		drm_fb_helper_set_par(info);
	}
 
 
	if (new_fb)
        list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list);
 
 
 
    LEAVE();
 
	return 0;
}
EXPORT_SYMBOL(drm_fb_helper_single_fb_probe);
 
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);
 
void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
			    uint32_t fb_width, uint32_t fb_height)
{
	struct drm_framebuffer *fb = fb_helper->fb;
	info->pseudo_palette = fb_helper->pseudo_palette;
	info->var.xres_virtual = fb->width;
	info->var.yres_virtual = fb->height;
	info->var.bits_per_pixel = fb->bits_per_pixel;
	info->var.accel_flags = FB_ACCELF_TEXT;
	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);
 
static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper,
					       uint32_t maxX,
					       uint32_t maxY)
{
	struct drm_connector *connector;
	int count = 0;
	int i;
 
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
		count += connector->funcs->fill_modes(connector, maxX, maxY);
	}
 
	return count;
}
 
static struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height)
{
	struct drm_display_mode *mode;
 
	list_for_each_entry(mode, &fb_connector->connector->modes, head) {
		if (drm_mode_width(mode) > width ||
		    drm_mode_height(mode) > height)
			continue;
		if (mode->type & DRM_MODE_TYPE_PREFERRED)
			return mode;
	}
	return NULL;
}
 
static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector)
{
	struct drm_cmdline_mode *cmdline_mode;
	cmdline_mode = &fb_connector->cmdline_mode;
	return cmdline_mode->specified;
}
 
 
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;
}
 
static void drm_enable_connectors(struct drm_fb_helper *fb_helper,
				  bool *enabled)
{
	bool any_enabled = false;
	struct drm_connector *connector;
	int i = 0;
 
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
		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;
 
	for (i = 0; i < fb_helper->connector_count; i++) {
		connector = fb_helper->connector_info[i]->connector;
		enabled[i] = drm_connector_enabled(connector, false);
	}
}
 
 
static bool drm_target_preferred(struct drm_fb_helper *fb_helper,
				 struct drm_display_mode **modes,
				 bool *enabled, int width, int height)
{
	struct drm_fb_helper_connector *fb_helper_conn;
	int i;
 
	for (i = 0; i < fb_helper->connector_count; i++) {
		fb_helper_conn = fb_helper->connector_info[i];
 
		if (enabled[i] == false)
			continue;
 
		DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n",
			      fb_helper_conn->connector->base.id);
 
		/* got for command line mode first */
//       modes[i] = drm_pick_cmdline_mode(fb_helper_conn, width, height);
 
        modes[i] = NULL;
 
		if (!modes[i]) {
			DRM_DEBUG_KMS("looking for preferred mode on connector %d\n",
				      fb_helper_conn->connector->base.id);
			modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
		}
		/* No preferred modes, pick one off the list */
		if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
			list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
				break;
		}
		DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
			  "none");
	}
	return true;
}
 
static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,
			  struct drm_fb_helper_crtc **best_crtcs,
			  struct drm_display_mode **modes,
			  int n, int width, int height)
{
	int c, o;
	struct drm_device *dev = fb_helper->dev;
	struct drm_connector *connector;
	struct drm_connector_helper_funcs *connector_funcs;
	struct drm_encoder *encoder;
	struct drm_fb_helper_crtc *best_crtc;
	int my_score, best_score, score;
	struct drm_fb_helper_crtc **crtcs, *crtc;
	struct drm_fb_helper_connector *fb_helper_conn;
 
	if (n == fb_helper->connector_count)
		return 0;
 
	fb_helper_conn = fb_helper->connector_info[n];
	connector = fb_helper_conn->connector;
 
	best_crtcs[n] = NULL;
	best_crtc = NULL;
	best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height);
	if (modes[n] == NULL)
		return best_score;
 
	crtcs = kzalloc(dev->mode_config.num_connector *
			sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
	if (!crtcs)
		return best_score;
 
	my_score = 1;
	if (connector->status == connector_status_connected)
		my_score++;
	if (drm_has_cmdline_mode(fb_helper_conn))
		my_score++;
	if (drm_has_preferred_mode(fb_helper_conn, width, height))
		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 */
	for (c = 0; c < fb_helper->crtc_count; c++) {
		crtc = &fb_helper->crtc_info[c];
 
		if ((encoder->possible_crtcs & (1 << c)) == 0) {
			continue;
		}
 
		for (o = 0; o < n; o++)
			if (best_crtcs[o] == crtc)
				break;
 
		if (o < n) {
			/* ignore cloning unless only a single crtc */
			if (fb_helper->crtc_count > 1)
				continue;
 
			if (!drm_mode_equal(modes[o], modes[n]))
				continue;
		}
 
		crtcs[n] = crtc;
		memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *));
		score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1,
						  width, height);
		if (score > best_score) {
			best_crtc = crtc;
			best_score = score;
			memcpy(best_crtcs, crtcs,
			       dev->mode_config.num_connector *
			       sizeof(struct drm_fb_helper_crtc *));
		}
	}
out:
	kfree(crtcs);
	return best_score;
}
 
static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
{
	struct drm_device *dev = fb_helper->dev;
	struct drm_fb_helper_crtc **crtcs;
	struct drm_display_mode **modes;
	struct drm_encoder *encoder;
	struct drm_mode_set *modeset;
	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,
			sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL);
	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);
 
	drm_enable_connectors(fb_helper, enabled);
 
    //ret = drm_target_cloned(fb_helper, modes, enabled, width, height);
 
    ret = 0;
 
	if (!ret) {
		ret = drm_target_preferred(fb_helper, modes, enabled, width, height);
		if (!ret)
			DRM_ERROR("Unable to find initial modes\n");
	}
 
	DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);
 
	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;
	}
 
	for (i = 0; i < fb_helper->connector_count; i++) {
		struct drm_display_mode *mode = modes[i];
		struct drm_fb_helper_crtc *fb_crtc = crtcs[i];
		modeset = &fb_crtc->mode_set;
 
		if (mode && fb_crtc) {
			DRM_DEBUG_KMS("desired mode %s set on crtc %d\n",
				      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);
			modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
		}
	}
 
	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.
 */
bool drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel)
{
	struct drm_device *dev = fb_helper->dev;
	int count = 0;
 
	/* disable all the possible outputs/crtcs before entering KMS mode */
//   drm_helper_disable_unused_functions(fb_helper->dev);
 
//   drm_fb_helper_parse_command_line(fb_helper);
 
	count = drm_fb_helper_probe_connector_modes(fb_helper,
						    dev->mode_config.max_width,
						    dev->mode_config.max_height);
	/*
	 * we shouldn't end up with no modes here.
	 */
	if (count == 0) {
		printk(KERN_INFO "No connectors reported connected with modes\n");
	}
	drm_setup_crtcs(fb_helper);
 
 
 
	return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
}
EXPORT_SYMBOL(drm_fb_helper_initial_config);

Rev 1963	Rev 1986
1	/*	1	/*
2	* Copyright (c) 2006-2009 Red Hat Inc.	2	* Copyright (c) 2006-2009 Red Hat Inc.
3	* Copyright (c) 2006-2008 Intel Corporation	3	* Copyright (c) 2006-2008 Intel Corporation
4	* Copyright (c) 2007 Dave Airlie	4	* Copyright (c) 2007 Dave Airlie
5	*	5	*
6	* DRM framebuffer helper functions	6	* DRM framebuffer helper functions
7	*	7	*
8	* Permission to use, copy, modify, distribute, and sell this software and its	8	* Permission to use, copy, modify, distribute, and sell this software and its
9	* documentation for any purpose is hereby granted without fee, provided that	9	* documentation for any purpose is hereby granted without fee, provided that
10	* the above copyright notice appear in all copies and that both that copyright	10	* the above copyright notice appear in all copies and that both that copyright
11	* notice and this permission notice appear in supporting documentation, and	11	* notice and this permission notice appear in supporting documentation, and
12	* that the name of the copyright holders not be used in advertising or	12	* that the name of the copyright holders not be used in advertising or
13	* publicity pertaining to distribution of the software without specific,	13	* publicity pertaining to distribution of the software without specific,
14	* written prior permission. The copyright holders make no representations	14	* written prior permission. The copyright holders make no representations
15	* about the suitability of this software for any purpose. It is provided "as	15	* about the suitability of this software for any purpose. It is provided "as
16	* is" without express or implied warranty.	16	* is" without express or implied warranty.
17	*	17	*
18	* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,	18	* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO	19	* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20	* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR	20	* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,	21	* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22	* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER	22	* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23	* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE	23	* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24	* OF THIS SOFTWARE.	24	* OF THIS SOFTWARE.
25	*	25	*
26	* Authors:	26	* Authors:
27	* Dave Airlie	27	* Dave Airlie
28	* Jesse Barnes	28	* Jesse Barnes
29	*/	29	*/
30	#include	30	#include
31	#include	31	#include
32	#include	32	#include
33	#include	33	#include
34	#include "drmP.h"	34	#include "drmP.h"
35	#include "drm_crtc.h"	35	#include "drm_crtc.h"
36	#include "drm_fb_helper.h"	36	#include "drm_fb_helper.h"
37	#include "drm_crtc_helper.h"	37	#include "drm_crtc_helper.h"
38		38
39	MODULE_AUTHOR("David Airlie, Jesse Barnes");	39	MODULE_AUTHOR("David Airlie, Jesse Barnes");
40	MODULE_DESCRIPTION("DRM KMS helper");	40	MODULE_DESCRIPTION("DRM KMS helper");
41	MODULE_LICENSE("GPL and additional rights");	41	MODULE_LICENSE("GPL and additional rights");
42		42
43	static LIST_HEAD(kernel_fb_helper_list);	43	static LIST_HEAD(kernel_fb_helper_list);
44		44
45	/* simple single crtc case helper function */	45	/* simple single crtc case helper function */
46	int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)	46	int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
47	{	47	{
48	struct drm_device *dev = fb_helper->dev;	48	struct drm_device *dev = fb_helper->dev;
49	struct drm_connector *connector;	49	struct drm_connector *connector;
50	int i;	50	int i;
51		51
52	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {	52	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
53	struct drm_fb_helper_connector *fb_helper_connector;	53	struct drm_fb_helper_connector *fb_helper_connector;
54		54
55	fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);	55	fb_helper_connector = kzalloc(sizeof(struct drm_fb_helper_connector), GFP_KERNEL);
56	if (!fb_helper_connector)	56	if (!fb_helper_connector)
57	goto fail;	57	goto fail;
58		58
59	fb_helper_connector->connector = connector;	59	fb_helper_connector->connector = connector;
60	fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;	60	fb_helper->connector_info[fb_helper->connector_count++] = fb_helper_connector;
61	}	61	}
62	return 0;	62	return 0;
63	fail:	63	fail:
64	for (i = 0; i < fb_helper->connector_count; i++) {	64	for (i = 0; i < fb_helper->connector_count; i++) {
65	kfree(fb_helper->connector_info[i]);	65	kfree(fb_helper->connector_info[i]);
66	fb_helper->connector_info[i] = NULL;	66	fb_helper->connector_info[i] = NULL;
67	}	67	}
68	fb_helper->connector_count = 0;	68	fb_helper->connector_count = 0;
69	return -ENOMEM;	69	return -ENOMEM;
70	}	70	}
71	EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);	71	EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors);
72		72
73	static void drm_fb_helper_save_lut_atomic(struct drm_crtc crtc, struct drm_fb_helper helper)	73	static void drm_fb_helper_save_lut_atomic(struct drm_crtc crtc, struct drm_fb_helper helper)
74	{	74	{
75	uint16_t r_base, g_base, *b_base;	75	uint16_t r_base, g_base, *b_base;
76	int i;	76	int i;
77		77
78	r_base = crtc->gamma_store;	78	r_base = crtc->gamma_store;
79	g_base = r_base + crtc->gamma_size;	79	g_base = r_base + crtc->gamma_size;
80	b_base = g_base + crtc->gamma_size;	80	b_base = g_base + crtc->gamma_size;
81		81
82	for (i = 0; i < crtc->gamma_size; i++)	82	for (i = 0; i < crtc->gamma_size; i++)
83	helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);	83	helper->funcs->gamma_get(crtc, &r_base[i], &g_base[i], &b_base[i], i);
84	}	84	}
85		85
86	static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)	86	static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc)
87	{	87	{
88	uint16_t r_base, g_base, *b_base;	88	uint16_t r_base, g_base, *b_base;
89		89
90	r_base = crtc->gamma_store;	90	r_base = crtc->gamma_store;
91	g_base = r_base + crtc->gamma_size;	91	g_base = r_base + crtc->gamma_size;
92	b_base = g_base + crtc->gamma_size;	92	b_base = g_base + crtc->gamma_size;
93		93
94	crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);	94	crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, 0, crtc->gamma_size);
95	}	95	}
96		96
97		97
98	static void drm_fb_helper_on(struct fb_info *info)	98	static void drm_fb_helper_on(struct fb_info *info)
99	{	99	{
100	struct drm_fb_helper *fb_helper = info->par;	100	struct drm_fb_helper *fb_helper = info->par;
101	struct drm_device *dev = fb_helper->dev;	101	struct drm_device *dev = fb_helper->dev;
102	struct drm_crtc *crtc;	102	struct drm_crtc *crtc;
103	struct drm_crtc_helper_funcs *crtc_funcs;	103	struct drm_crtc_helper_funcs *crtc_funcs;
104	struct drm_connector *connector;	104	struct drm_connector *connector;
105	struct drm_encoder *encoder;	105	struct drm_encoder *encoder;
106	int i, j;	106	int i, j;
107		107
108	/*	108	/*
109	* For each CRTC in this fb, turn the crtc on then,	109	* For each CRTC in this fb, turn the crtc on then,
110	* find all associated encoders and turn them on.	110	* find all associated encoders and turn them on.
111	*/	111	*/
112	mutex_lock(&dev->mode_config.mutex);	112	mutex_lock(&dev->mode_config.mutex);
113	for (i = 0; i < fb_helper->crtc_count; i++) {	113	for (i = 0; i < fb_helper->crtc_count; i++) {
114	crtc = fb_helper->crtc_info[i].mode_set.crtc;	114	crtc = fb_helper->crtc_info[i].mode_set.crtc;
115	crtc_funcs = crtc->helper_private;	115	crtc_funcs = crtc->helper_private;
116		116
117	if (!crtc->enabled)	117	if (!crtc->enabled)
118	continue;	118	continue;
119		119
120	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);	120	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
121		121
122	/* Walk the connectors & encoders on this fb turning them on */	122	/* Walk the connectors & encoders on this fb turning them on */
123	for (j = 0; j < fb_helper->connector_count; j++) {	123	for (j = 0; j < fb_helper->connector_count; j++) {
124	connector = fb_helper->connector_info[j]->connector;	124	connector = fb_helper->connector_info[j]->connector;
125	connector->dpms = DRM_MODE_DPMS_ON;	125	connector->dpms = DRM_MODE_DPMS_ON;
126	drm_connector_property_set_value(connector,	126	drm_connector_property_set_value(connector,
127	dev->mode_config.dpms_property,	127	dev->mode_config.dpms_property,
128	DRM_MODE_DPMS_ON);	128	DRM_MODE_DPMS_ON);
129	}	129	}
130	/* Found a CRTC on this fb, now find encoders */	130	/* Found a CRTC on this fb, now find encoders */
131	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {	131	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
132	if (encoder->crtc == crtc) {	132	if (encoder->crtc == crtc) {
133	struct drm_encoder_helper_funcs *encoder_funcs;	133	struct drm_encoder_helper_funcs *encoder_funcs;
134		134
135	encoder_funcs = encoder->helper_private;	135	encoder_funcs = encoder->helper_private;
136	encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);	136	encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
137	}	137	}
138	}	138	}
139	}	139	}
140	mutex_unlock(&dev->mode_config.mutex);	140	mutex_unlock(&dev->mode_config.mutex);
141	}	141	}
142		142
143	static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)	143	static void drm_fb_helper_off(struct fb_info *info, int dpms_mode)
144	{	144	{
145	struct drm_fb_helper *fb_helper = info->par;	145	struct drm_fb_helper *fb_helper = info->par;
146	struct drm_device *dev = fb_helper->dev;	146	struct drm_device *dev = fb_helper->dev;
147	struct drm_crtc *crtc;	147	struct drm_crtc *crtc;
148	struct drm_crtc_helper_funcs *crtc_funcs;	148	struct drm_crtc_helper_funcs *crtc_funcs;
149	struct drm_connector *connector;	149	struct drm_connector *connector;
150	struct drm_encoder *encoder;	150	struct drm_encoder *encoder;
151	int i, j;	151	int i, j;
152		152
153	/*	153	/*
154	* For each CRTC in this fb, find all associated encoders	154	* For each CRTC in this fb, find all associated encoders
155	* and turn them off, then turn off the CRTC.	155	* and turn them off, then turn off the CRTC.
156	*/	156	*/
157	mutex_lock(&dev->mode_config.mutex);	157	mutex_lock(&dev->mode_config.mutex);
158	for (i = 0; i < fb_helper->crtc_count; i++) {	158	for (i = 0; i < fb_helper->crtc_count; i++) {
159	crtc = fb_helper->crtc_info[i].mode_set.crtc;	159	crtc = fb_helper->crtc_info[i].mode_set.crtc;
160	crtc_funcs = crtc->helper_private;	160	crtc_funcs = crtc->helper_private;
161		161
162	if (!crtc->enabled)	162	if (!crtc->enabled)
163	continue;	163	continue;
164		164
165	/* Walk the connectors on this fb and mark them off */	165	/* Walk the connectors on this fb and mark them off */
166	for (j = 0; j < fb_helper->connector_count; j++) {	166	for (j = 0; j < fb_helper->connector_count; j++) {
167	connector = fb_helper->connector_info[j]->connector;	167	connector = fb_helper->connector_info[j]->connector;
168	connector->dpms = dpms_mode;	168	connector->dpms = dpms_mode;
169	drm_connector_property_set_value(connector,	169	drm_connector_property_set_value(connector,
170	dev->mode_config.dpms_property,	170	dev->mode_config.dpms_property,
171	dpms_mode);	171	dpms_mode);
172	}	172	}
173	/* Found a CRTC on this fb, now find encoders */	173	/* Found a CRTC on this fb, now find encoders */
174	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {	174	list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
175	if (encoder->crtc == crtc) {	175	if (encoder->crtc == crtc) {
176	struct drm_encoder_helper_funcs *encoder_funcs;	176	struct drm_encoder_helper_funcs *encoder_funcs;
177		177
178	encoder_funcs = encoder->helper_private;	178	encoder_funcs = encoder->helper_private;
179	encoder_funcs->dpms(encoder, dpms_mode);	179	encoder_funcs->dpms(encoder, dpms_mode);
180	}	180	}
181	}	181	}
182	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);	182	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
183	}	183	}
184	mutex_unlock(&dev->mode_config.mutex);	184	mutex_unlock(&dev->mode_config.mutex);
185	}	185	}
186		186
187	int drm_fb_helper_blank(int blank, struct fb_info *info)	187	int drm_fb_helper_blank(int blank, struct fb_info *info)
188	{	188	{
189	switch (blank) {	189	switch (blank) {
190	/* Display: On; HSync: On, VSync: On */	190	/* Display: On; HSync: On, VSync: On */
191	case FB_BLANK_UNBLANK:	191	case FB_BLANK_UNBLANK:
192	drm_fb_helper_on(info);	192	drm_fb_helper_on(info);
193	break;	193	break;
194	/* Display: Off; HSync: On, VSync: On */	194	/* Display: Off; HSync: On, VSync: On */
195	case FB_BLANK_NORMAL:	195	case FB_BLANK_NORMAL:
196	drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);	196	drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
197	break;	197	break;
198	/* Display: Off; HSync: Off, VSync: On */	198	/* Display: Off; HSync: Off, VSync: On */
199	case FB_BLANK_HSYNC_SUSPEND:	199	case FB_BLANK_HSYNC_SUSPEND:
200	drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);	200	drm_fb_helper_off(info, DRM_MODE_DPMS_STANDBY);
201	break;	201	break;
202	/* Display: Off; HSync: On, VSync: Off */	202	/* Display: Off; HSync: On, VSync: Off */
203	case FB_BLANK_VSYNC_SUSPEND:	203	case FB_BLANK_VSYNC_SUSPEND:
204	drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);	204	drm_fb_helper_off(info, DRM_MODE_DPMS_SUSPEND);
205	break;	205	break;
206	/* Display: Off; HSync: Off, VSync: Off */	206	/* Display: Off; HSync: Off, VSync: Off */
207	case FB_BLANK_POWERDOWN:	207	case FB_BLANK_POWERDOWN:
208	drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);	208	drm_fb_helper_off(info, DRM_MODE_DPMS_OFF);
209	break;	209	break;
210	}	210	}
211	return 0;	211	return 0;
212	}	212	}
213	EXPORT_SYMBOL(drm_fb_helper_blank);	213	EXPORT_SYMBOL(drm_fb_helper_blank);
214		214
215	static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)	215	static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper)
216	{	216	{
217	int i;	217	int i;
218		218
219	for (i = 0; i < helper->connector_count; i++)	219	for (i = 0; i < helper->connector_count; i++)
220	kfree(helper->connector_info[i]);	220	kfree(helper->connector_info[i]);
221	kfree(helper->connector_info);	221	kfree(helper->connector_info);
222	for (i = 0; i < helper->crtc_count; i++)	222	for (i = 0; i < helper->crtc_count; i++)
223	kfree(helper->crtc_info[i].mode_set.connectors);	223	kfree(helper->crtc_info[i].mode_set.connectors);
224	kfree(helper->crtc_info);	224	kfree(helper->crtc_info);
225	}	225	}
226		226
227	int drm_fb_helper_init(struct drm_device *dev,	227	int drm_fb_helper_init(struct drm_device *dev,
228	struct drm_fb_helper *fb_helper,	228	struct drm_fb_helper *fb_helper,
229	int crtc_count, int max_conn_count)	229	int crtc_count, int max_conn_count)
230	{	230	{
231	struct drm_crtc *crtc;	231	struct drm_crtc *crtc;
232	int ret = 0;	232	int ret = 0;
233	int i;	233	int i;
234		234
235	fb_helper->dev = dev;	235	fb_helper->dev = dev;
236		236
237	INIT_LIST_HEAD(&fb_helper->kernel_fb_list);	237	INIT_LIST_HEAD(&fb_helper->kernel_fb_list);
238		238
239	fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);	239	fb_helper->crtc_info = kcalloc(crtc_count, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL);
240	if (!fb_helper->crtc_info)	240	if (!fb_helper->crtc_info)
241	return -ENOMEM;	241	return -ENOMEM;
242		242
243	fb_helper->crtc_count = crtc_count;	243	fb_helper->crtc_count = crtc_count;
244	fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);	244	fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL);
245	if (!fb_helper->connector_info) {	245	if (!fb_helper->connector_info) {
246	kfree(fb_helper->crtc_info);	246	kfree(fb_helper->crtc_info);
247	return -ENOMEM;	247	return -ENOMEM;
248	}	248	}
249	fb_helper->connector_count = 0;	249	fb_helper->connector_count = 0;
250		250
251	for (i = 0; i < crtc_count; i++) {	251	for (i = 0; i < crtc_count; i++) {
252	fb_helper->crtc_info[i].mode_set.connectors =	252	fb_helper->crtc_info[i].mode_set.connectors =
253	kcalloc(max_conn_count,	253	kcalloc(max_conn_count,
254	sizeof(struct drm_connector *),	254	sizeof(struct drm_connector *),
255	GFP_KERNEL);	255	GFP_KERNEL);
256		256
257	if (!fb_helper->crtc_info[i].mode_set.connectors) {	257	if (!fb_helper->crtc_info[i].mode_set.connectors) {
258	ret = -ENOMEM;	258	ret = -ENOMEM;
259	goto out_free;	259	goto out_free;
260	}	260	}
261	fb_helper->crtc_info[i].mode_set.num_connectors = 0;	261	fb_helper->crtc_info[i].mode_set.num_connectors = 0;
262	}	262	}
263		263
264	i = 0;	264	i = 0;
265	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {	265	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
266	fb_helper->crtc_info[i].crtc_id = crtc->base.id;	266	fb_helper->crtc_info[i].crtc_id = crtc->base.id;
267	fb_helper->crtc_info[i].mode_set.crtc = crtc;	267	fb_helper->crtc_info[i].mode_set.crtc = crtc;
268	i++;	268	i++;
269	}	269	}
270	fb_helper->conn_limit = max_conn_count;	270	fb_helper->conn_limit = max_conn_count;
271	return 0;	271	return 0;
272	out_free:	272	out_free:
273	drm_fb_helper_crtc_free(fb_helper);	273	drm_fb_helper_crtc_free(fb_helper);
274	return -ENOMEM;	274	return -ENOMEM;
275	}	275	}
276	EXPORT_SYMBOL(drm_fb_helper_init);	276	EXPORT_SYMBOL(drm_fb_helper_init);
277		277
278	static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,	278	static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green,
279	u16 blue, u16 regno, struct fb_info *info)	279	u16 blue, u16 regno, struct fb_info *info)
280	{	280	{
281	struct drm_fb_helper *fb_helper = info->par;	281	struct drm_fb_helper *fb_helper = info->par;
282	struct drm_framebuffer *fb = fb_helper->fb;	282	struct drm_framebuffer *fb = fb_helper->fb;
283	int pindex;	283	int pindex;
284		284
285	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {	285	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
286	u32 *palette;	286	u32 *palette;
287	u32 value;	287	u32 value;
288	/* place color in psuedopalette */	288	/* place color in psuedopalette */
289	if (regno > 16)	289	if (regno > 16)
290	return -EINVAL;	290	return -EINVAL;
291	palette = (u32 *)info->pseudo_palette;	291	palette = (u32 *)info->pseudo_palette;
292	red >>= (16 - info->var.red.length);	292	red >>= (16 - info->var.red.length);
293	green >>= (16 - info->var.green.length);	293	green >>= (16 - info->var.green.length);
294	blue >>= (16 - info->var.blue.length);	294	blue >>= (16 - info->var.blue.length);
295	value = (red << info->var.red.offset) \|	295	value = (red << info->var.red.offset) \|
296	(green << info->var.green.offset) \|	296	(green << info->var.green.offset) \|
297	(blue << info->var.blue.offset);	297	(blue << info->var.blue.offset);
298	if (info->var.transp.length > 0) {	298	if (info->var.transp.length > 0) {
299	u32 mask = (1 << info->var.transp.length) - 1;	299	u32 mask = (1 << info->var.transp.length) - 1;
300	mask <<= info->var.transp.offset;	300	mask <<= info->var.transp.offset;
301	value \|= mask;	301	value \|= mask;
302	}	302	}
303	palette[regno] = value;	303	palette[regno] = value;
304	return 0;	304	return 0;
305	}	305	}
306		306
307	pindex = regno;	307	pindex = regno;
308		308
309	if (fb->bits_per_pixel == 16) {	309	if (fb->bits_per_pixel == 16) {
310	pindex = regno << 3;	310	pindex = regno << 3;
311		311
312	if (fb->depth == 16 && regno > 63)	312	if (fb->depth == 16 && regno > 63)
313	return -EINVAL;	313	return -EINVAL;
314	if (fb->depth == 15 && regno > 31)	314	if (fb->depth == 15 && regno > 31)
315	return -EINVAL;	315	return -EINVAL;
316		316
317	if (fb->depth == 16) {	317	if (fb->depth == 16) {
318	u16 r, g, b;	318	u16 r, g, b;
319	int i;	319	int i;
320	if (regno < 32) {	320	if (regno < 32) {
321	for (i = 0; i < 8; i++)	321	for (i = 0; i < 8; i++)
322	fb_helper->funcs->gamma_set(crtc, red,	322	fb_helper->funcs->gamma_set(crtc, red,
323	green, blue, pindex + i);	323	green, blue, pindex + i);
324	}	324	}
325		325
326	fb_helper->funcs->gamma_get(crtc, &r,	326	fb_helper->funcs->gamma_get(crtc, &r,
327	&g, &b,	327	&g, &b,
328	pindex >> 1);	328	pindex >> 1);
329		329
330	for (i = 0; i < 4; i++)	330	for (i = 0; i < 4; i++)
331	fb_helper->funcs->gamma_set(crtc, r,	331	fb_helper->funcs->gamma_set(crtc, r,
332	green, b,	332	green, b,
333	(pindex >> 1) + i);	333	(pindex >> 1) + i);
334	}	334	}
335	}	335	}
336		336
337	if (fb->depth != 16)	337	if (fb->depth != 16)
338	fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);	338	fb_helper->funcs->gamma_set(crtc, red, green, blue, pindex);
339	return 0;	339	return 0;
340	}	340	}
341		341
342	int drm_fb_helper_setcmap(struct fb_cmap cmap, struct fb_info info)	342	int drm_fb_helper_setcmap(struct fb_cmap cmap, struct fb_info info)
343	{	343	{
344	struct drm_fb_helper *fb_helper = info->par;	344	struct drm_fb_helper *fb_helper = info->par;
345	struct drm_crtc_helper_funcs *crtc_funcs;	345	struct drm_crtc_helper_funcs *crtc_funcs;
346	u16 red, green, blue, transp;	346	u16 red, green, blue, transp;
347	struct drm_crtc *crtc;	347	struct drm_crtc *crtc;
348	int i, j, rc = 0;	348	int i, j, rc = 0;
349	int start;	349	int start;
350		350
351	for (i = 0; i < fb_helper->crtc_count; i++) {	351	for (i = 0; i < fb_helper->crtc_count; i++) {
352	crtc = fb_helper->crtc_info[i].mode_set.crtc;	352	crtc = fb_helper->crtc_info[i].mode_set.crtc;
353	crtc_funcs = crtc->helper_private;	353	crtc_funcs = crtc->helper_private;
354		354
355	red = cmap->red;	355	red = cmap->red;
356	green = cmap->green;	356	green = cmap->green;
357	blue = cmap->blue;	357	blue = cmap->blue;
358	transp = cmap->transp;	358	transp = cmap->transp;
359	start = cmap->start;	359	start = cmap->start;
360		360
361	for (j = 0; j < cmap->len; j++) {	361	for (j = 0; j < cmap->len; j++) {
362	u16 hred, hgreen, hblue, htransp = 0xffff;	362	u16 hred, hgreen, hblue, htransp = 0xffff;
363		363
364	hred = *red++;	364	hred = *red++;
365	hgreen = *green++;	365	hgreen = *green++;
366	hblue = *blue++;	366	hblue = *blue++;
367		367
368	if (transp)	368	if (transp)
369	htransp = *transp++;	369	htransp = *transp++;
370		370
371	rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);	371	rc = setcolreg(crtc, hred, hgreen, hblue, start++, info);
372	if (rc)	372	if (rc)
373	return rc;	373	return rc;
374	}	374	}
375	crtc_funcs->load_lut(crtc);	375	crtc_funcs->load_lut(crtc);
376	}	376	}
377	return rc;	377	return rc;
378	}	378	}
379	EXPORT_SYMBOL(drm_fb_helper_setcmap);	379	EXPORT_SYMBOL(drm_fb_helper_setcmap);
380		380
381	int drm_fb_helper_check_var(struct fb_var_screeninfo *var,	381	int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
382	struct fb_info *info)	382	struct fb_info *info)
383	{	383	{
384	struct drm_fb_helper *fb_helper = info->par;	384	struct drm_fb_helper *fb_helper = info->par;
385	struct drm_framebuffer *fb = fb_helper->fb;	385	struct drm_framebuffer *fb = fb_helper->fb;
386	int depth;	386	int depth;
387		387
388	if (var->pixclock != 0 \|\| in_dbg_master())	388	if (var->pixclock != 0 \|\| in_dbg_master())
389	return -EINVAL;	389	return -EINVAL;
390		390
391	/* Need to resize the fb object !!! */	391	/* Need to resize the fb object !!! */
392	if (var->bits_per_pixel > fb->bits_per_pixel \|\| var->xres > fb->width \|\| var->yres > fb->height) {	392	if (var->bits_per_pixel > fb->bits_per_pixel \|\| var->xres > fb->width \|\| var->yres > fb->height) {
393	DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "	393	DRM_DEBUG("fb userspace requested width/height/bpp is greater than current fb "
394	"object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,	394	"object %dx%d-%d > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel,
395	fb->width, fb->height, fb->bits_per_pixel);	395	fb->width, fb->height, fb->bits_per_pixel);
396	return -EINVAL;	396	return -EINVAL;
397	}	397	}
398		398
399	switch (var->bits_per_pixel) {	399	switch (var->bits_per_pixel) {
400	case 16:	400	case 16:
401	depth = (var->green.length == 6) ? 16 : 15;	401	depth = (var->green.length == 6) ? 16 : 15;
402	break;	402	break;
403	case 32:	403	case 32:
404	depth = (var->transp.length > 0) ? 32 : 24;	404	depth = (var->transp.length > 0) ? 32 : 24;
405	break;	405	break;
406	default:	406	default:
407	depth = var->bits_per_pixel;	407	depth = var->bits_per_pixel;
408	break;	408	break;
409	}	409	}
410		410
411	switch (depth) {	411	switch (depth) {
412	case 8:	412	case 8:
413	var->red.offset = 0;	413	var->red.offset = 0;
414	var->green.offset = 0;	414	var->green.offset = 0;
415	var->blue.offset = 0;	415	var->blue.offset = 0;
416	var->red.length = 8;	416	var->red.length = 8;
417	var->green.length = 8;	417	var->green.length = 8;
418	var->blue.length = 8;	418	var->blue.length = 8;
419	var->transp.length = 0;	419	var->transp.length = 0;
420	var->transp.offset = 0;	420	var->transp.offset = 0;
421	break;	421	break;
422	case 15:	422	case 15:
423	var->red.offset = 10;	423	var->red.offset = 10;
424	var->green.offset = 5;	424	var->green.offset = 5;
425	var->blue.offset = 0;	425	var->blue.offset = 0;
426	var->red.length = 5;	426	var->red.length = 5;
427	var->green.length = 5;	427	var->green.length = 5;
428	var->blue.length = 5;	428	var->blue.length = 5;
429	var->transp.length = 1;	429	var->transp.length = 1;
430	var->transp.offset = 15;	430	var->transp.offset = 15;
431	break;	431	break;
432	case 16:	432	case 16:
433	var->red.offset = 11;	433	var->red.offset = 11;
434	var->green.offset = 5;	434	var->green.offset = 5;
435	var->blue.offset = 0;	435	var->blue.offset = 0;
436	var->red.length = 5;	436	var->red.length = 5;
437	var->green.length = 6;	437	var->green.length = 6;
438	var->blue.length = 5;	438	var->blue.length = 5;
439	var->transp.length = 0;	439	var->transp.length = 0;
440	var->transp.offset = 0;	440	var->transp.offset = 0;
441	break;	441	break;
442	case 24:	442	case 24:
443	var->red.offset = 16;	443	var->red.offset = 16;
444	var->green.offset = 8;	444	var->green.offset = 8;
445	var->blue.offset = 0;	445	var->blue.offset = 0;
446	var->red.length = 8;	446	var->red.length = 8;
447	var->green.length = 8;	447	var->green.length = 8;
448	var->blue.length = 8;	448	var->blue.length = 8;
449	var->transp.length = 0;	449	var->transp.length = 0;
450	var->transp.offset = 0;	450	var->transp.offset = 0;
451	break;	451	break;
452	case 32:	452	case 32:
453	var->red.offset = 16;	453	var->red.offset = 16;
454	var->green.offset = 8;	454	var->green.offset = 8;
455	var->blue.offset = 0;	455	var->blue.offset = 0;
456	var->red.length = 8;	456	var->red.length = 8;
457	var->green.length = 8;	457	var->green.length = 8;
458	var->blue.length = 8;	458	var->blue.length = 8;
459	var->transp.length = 8;	459	var->transp.length = 8;
460	var->transp.offset = 24;	460	var->transp.offset = 24;
461	break;	461	break;
462	default:	462	default:
463	return -EINVAL;	463	return -EINVAL;
464	}	464	}
465	return 0;	465	return 0;
466	}	466	}
467	EXPORT_SYMBOL(drm_fb_helper_check_var);	467	EXPORT_SYMBOL(drm_fb_helper_check_var);
468		468
469	/* this will let fbcon do the mode init */	469	/* this will let fbcon do the mode init */
470	int drm_fb_helper_set_par(struct fb_info *info)	470	int drm_fb_helper_set_par(struct fb_info *info)
471	{	471	{
472	struct drm_fb_helper *fb_helper = info->par;	472	struct drm_fb_helper *fb_helper = info->par;
473	struct drm_device *dev = fb_helper->dev;	473	struct drm_device *dev = fb_helper->dev;
474	struct fb_var_screeninfo *var = &info->var;	474	struct fb_var_screeninfo *var = &info->var;
475	struct drm_crtc *crtc;	475	struct drm_crtc *crtc;
476	int ret;	476	int ret;
477	int i;	477	int i;
478		478
479	if (var->pixclock != 0) {	479	if (var->pixclock != 0) {
480	DRM_ERROR("PIXEL CLOCK SET\n");	480	DRM_ERROR("PIXEL CLOCK SET\n");
481	return -EINVAL;	481	return -EINVAL;
482	}	482	}
483		483
484	mutex_lock(&dev->mode_config.mutex);	484	mutex_lock(&dev->mode_config.mutex);
485	for (i = 0; i < fb_helper->crtc_count; i++) {	485	for (i = 0; i < fb_helper->crtc_count; i++) {
486	crtc = fb_helper->crtc_info[i].mode_set.crtc;	486	crtc = fb_helper->crtc_info[i].mode_set.crtc;
487	ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);	487	ret = crtc->funcs->set_config(&fb_helper->crtc_info[i].mode_set);
488	if (ret) {	488	if (ret) {
489	mutex_unlock(&dev->mode_config.mutex);	489	mutex_unlock(&dev->mode_config.mutex);
490	return ret;	490	return ret;
491	}	491	}
492	}	492	}
493	mutex_unlock(&dev->mode_config.mutex);	493	mutex_unlock(&dev->mode_config.mutex);
494		494
495	if (fb_helper->delayed_hotplug) {	495	if (fb_helper->delayed_hotplug) {
496	fb_helper->delayed_hotplug = false;	496	fb_helper->delayed_hotplug = false;
497	// drm_fb_helper_hotplug_event(fb_helper);	497	// drm_fb_helper_hotplug_event(fb_helper);
498	}	498	}
499	return 0;	499	return 0;
500	}	500	}

Subversion Repositories Kolibri OS

(root)/drivers/video/drm/drm_fb_helper.c – Rev 1963 → 1986