linux/drivers/gpu/drm/i915/intel_fb.c

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/*
* Copyright © 2007 David Airlie
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* David Airlie
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/sysrq.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include "drmP.h"
#include "drm.h"
#include "drm_crtc.h"
#include "intel_drv.h"
#include "i915_drm.h"
#include "i915_drv.h"
struct intelfb_par {
struct drm_device *dev;
struct drm_display_mode *our_mode;
struct intel_framebuffer *intel_fb;
int crtc_count;
/* crtc currently bound to this */
uint32_t crtc_ids[2];
};
static int intelfb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info)
{
struct intelfb_par *par = info->par;
struct drm_device *dev = par->dev;
struct drm_crtc *crtc;
int i;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct drm_mode_set *modeset = &intel_crtc->mode_set;
struct drm_framebuffer *fb = modeset->fb;
for (i = 0; i < par->crtc_count; i++)
if (crtc->base.id == par->crtc_ids[i])
break;
if (i == par->crtc_count)
continue;
if (regno > 255)
return 1;
if (fb->depth == 8) {
intel_crtc_fb_gamma_set(crtc, red, green, blue, regno);
return 0;
}
if (regno < 16) {
switch (fb->depth) {
case 15:
fb->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
((green & 0xf800) >> 6) |
((blue & 0xf800) >> 11);
break;
case 16:
fb->pseudo_palette[regno] = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
break;
case 24:
case 32:
fb->pseudo_palette[regno] = ((red & 0xff00) << 8) |
(green & 0xff00) |
((blue & 0xff00) >> 8);
break;
}
}
}
return 0;
}
static int intelfb_check_var(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct intelfb_par *par = info->par;
struct intel_framebuffer *intel_fb = par->intel_fb;
struct drm_framebuffer *fb = &intel_fb->base;
int depth;
if (var->pixclock == -1 || !var->pixclock)
return -EINVAL;
/* Need to resize the fb object !!! */
if (var->xres > fb->width || var->yres > fb->height) {
DRM_ERROR("Requested width/height is greater than current fb object %dx%d > %dx%d\n",var->xres,var->yres,fb->width,fb->height);
DRM_ERROR("Need resizing code.\n");
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;
}
/* this will let fbcon do the mode init */
/* FIXME: take mode config lock? */
static int intelfb_set_par(struct fb_info *info)
{
struct intelfb_par *par = info->par;
struct drm_device *dev = par->dev;
struct fb_var_screeninfo *var = &info->var;
int i;
DRM_DEBUG("%d %d\n", var->xres, var->pixclock);
if (var->pixclock != -1) {
DRM_ERROR("PIXEL CLOCK SET\n");
return -EINVAL;
} else {
struct drm_crtc *crtc;
int ret;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
for (i = 0; i < par->crtc_count; i++)
if (crtc->base.id == par->crtc_ids[i])
break;
if (i == par->crtc_count)
continue;
if (crtc->fb == intel_crtc->mode_set.fb) {
mutex_lock(&dev->mode_config.mutex);
ret = crtc->funcs->set_config(&intel_crtc->mode_set);
mutex_unlock(&dev->mode_config.mutex);
if (ret)
return ret;
}
}
return 0;
}
}
static int intelfb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
struct intelfb_par *par = info->par;
struct drm_device *dev = par->dev;
struct drm_mode_set *modeset;
struct drm_crtc *crtc;
struct intel_crtc *intel_crtc;
int ret = 0;
int i;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
for (i = 0; i < par->crtc_count; i++)
if (crtc->base.id == par->crtc_ids[i])
break;
if (i == par->crtc_count)
continue;
intel_crtc = to_intel_crtc(crtc);
modeset = &intel_crtc->mode_set;
modeset->x = var->xoffset;
modeset->y = var->yoffset;
if (modeset->num_connectors) {
mutex_lock(&dev->mode_config.mutex);
ret = crtc->funcs->set_config(modeset);
mutex_unlock(&dev->mode_config.mutex);
if (!ret) {
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
}
}
}
return ret;
}
static void intelfb_on(struct fb_info *info)
{
struct intelfb_par *par = info->par;
struct drm_device *dev = par->dev;
struct drm_crtc *crtc;
struct drm_encoder *encoder;
int i;
/*
* For each CRTC in this fb, find all associated encoders
* and turn them off, then turn off the CRTC.
*/
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
for (i = 0; i < par->crtc_count; i++)
if (crtc->base.id == par->crtc_ids[i])
break;
crtc_funcs->dpms(crtc, 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);
}
}
}
}
static void intelfb_off(struct fb_info *info, int dpms_mode)
{
struct intelfb_par *par = info->par;
struct drm_device *dev = par->dev;
struct drm_crtc *crtc;
struct drm_encoder *encoder;
int i;
/*
* For each CRTC in this fb, find all associated encoders
* and turn them off, then turn off the CRTC.
*/
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
for (i = 0; i < par->crtc_count; i++)
if (crtc->base.id == par->crtc_ids[i])
break;
/* 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);
}
}
if (dpms_mode == DRM_MODE_DPMS_OFF)
crtc_funcs->dpms(crtc, dpms_mode);
}
}
static int intelfb_blank(int blank, struct fb_info *info)
{
switch (blank) {
case FB_BLANK_UNBLANK:
intelfb_on(info);
break;
case FB_BLANK_NORMAL:
intelfb_off(info, DRM_MODE_DPMS_STANDBY);
break;
case FB_BLANK_HSYNC_SUSPEND:
intelfb_off(info, DRM_MODE_DPMS_STANDBY);
break;
case FB_BLANK_VSYNC_SUSPEND:
intelfb_off(info, DRM_MODE_DPMS_SUSPEND);
break;
case FB_BLANK_POWERDOWN:
intelfb_off(info, DRM_MODE_DPMS_OFF);
break;
}
return 0;
}
static struct fb_ops intelfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = intelfb_check_var,
.fb_set_par = intelfb_set_par,
.fb_setcolreg = intelfb_setcolreg,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_pan_display = intelfb_pan_display,
.fb_blank = intelfb_blank,
};
/**
* Curretly it is assumed that the old framebuffer is reused.
*
* LOCKING
* caller should hold the mode config lock.
*
*/
int intelfb_resize(struct drm_device *dev, struct drm_crtc *crtc)
{
struct fb_info *info;
struct drm_framebuffer *fb;
struct drm_display_mode *mode = crtc->desired_mode;
fb = crtc->fb;
if (!fb)
return 1;
info = fb->fbdev;
if (!info)
return 1;
if (!mode)
return 1;
info->var.xres = mode->hdisplay;
info->var.right_margin = mode->hsync_start - mode->hdisplay;
info->var.hsync_len = mode->hsync_end - mode->hsync_start;
info->var.left_margin = mode->htotal - mode->hsync_end;
info->var.yres = mode->vdisplay;
info->var.lower_margin = mode->vsync_start - mode->vdisplay;
info->var.vsync_len = mode->vsync_end - mode->vsync_start;
info->var.upper_margin = mode->vtotal - mode->vsync_end;
info->var.pixclock = 10000000 / mode->htotal * 1000 / mode->vtotal * 100;
/* avoid overflow */
info->var.pixclock = info->var.pixclock * 1000 / mode->vrefresh;
return 0;
}
EXPORT_SYMBOL(intelfb_resize);
static struct drm_mode_set kernelfb_mode;
static int intelfb_panic(struct notifier_block *n, unsigned long ununsed,
void *panic_str)
{
DRM_ERROR("panic occurred, switching back to text console\n");
intelfb_restore();
return 0;
}
static struct notifier_block paniced = {
.notifier_call = intelfb_panic,
};
static int intelfb_create(struct drm_device *dev, uint32_t fb_width,
uint32_t fb_height, uint32_t surface_width,
uint32_t surface_height,
struct intel_framebuffer **intel_fb_p)
{
struct fb_info *info;
struct intelfb_par *par;
struct drm_framebuffer *fb;
struct intel_framebuffer *intel_fb;
struct drm_mode_fb_cmd mode_cmd;
struct drm_gem_object *fbo = NULL;
struct drm_i915_gem_object *obj_priv;
struct device *device = &dev->pdev->dev;
int size, ret, mmio_bar = IS_I9XX(dev) ? 0 : 1;
mode_cmd.width = surface_width;
mode_cmd.height = surface_height;
mode_cmd.bpp = 32;
mode_cmd.pitch = ALIGN(mode_cmd.width * ((mode_cmd.bpp + 1) / 8), 64);
mode_cmd.depth = 24;
size = mode_cmd.pitch * mode_cmd.height;
size = ALIGN(size, PAGE_SIZE);
fbo = drm_gem_object_alloc(dev, size);
if (!fbo) {
printk(KERN_ERR "failed to allocate framebuffer\n");
ret = -ENOMEM;
goto out;
}
obj_priv = fbo->driver_private;
mutex_lock(&dev->struct_mutex);
ret = i915_gem_object_pin(fbo, PAGE_SIZE);
if (ret) {
DRM_ERROR("failed to pin fb: %d\n", ret);
goto out_unref;
}
/* Flush everything out, we'll be doing GTT only from now on */
i915_gem_object_set_to_gtt_domain(fbo, 1);
ret = intel_framebuffer_create(dev, &mode_cmd, &fb, fbo);
if (ret) {
DRM_ERROR("failed to allocate fb.\n");
goto out_unpin;
}
list_add(&fb->filp_head, &dev->mode_config.fb_kernel_list);
intel_fb = to_intel_framebuffer(fb);
*intel_fb_p = intel_fb;
info = framebuffer_alloc(sizeof(struct intelfb_par), device);
if (!info) {
ret = -ENOMEM;
goto out_unpin;
}
par = info->par;
strcpy(info->fix.id, "inteldrmfb");
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.visual = FB_VISUAL_TRUECOLOR;
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_I830;
info->fix.type_aux = 0;
info->flags = FBINFO_DEFAULT;
info->fbops = &intelfb_ops;
info->fix.line_length = fb->pitch;
/* setup aperture base/size for vesafb takeover */
info->aperture_base = dev->mode_config.fb_base;
if (IS_I9XX(dev))
info->aperture_size = pci_resource_len(dev->pdev, 2);
else
info->aperture_size = pci_resource_len(dev->pdev, 0);
info->fix.smem_start = dev->mode_config.fb_base + obj_priv->gtt_offset;
info->fix.smem_len = size;
info->flags = FBINFO_DEFAULT;
info->screen_base = ioremap_wc(dev->agp->base + obj_priv->gtt_offset,
size);
if (!info->screen_base) {
ret = -ENOSPC;
goto out_unpin;
}
info->screen_size = size;
// memset(info->screen_base, 0, size);
info->pseudo_palette = fb->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.xoffset = 0;
info->var.yoffset = 0;
info->var.activate = FB_ACTIVATE_NOW;
info->var.height = -1;
info->var.width = -1;
info->var.xres = fb_width;
info->var.yres = fb_height;
/* FIXME: we really shouldn't expose mmio space at all */
info->fix.mmio_start = pci_resource_start(dev->pdev, mmio_bar);
info->fix.mmio_len = pci_resource_len(dev->pdev, mmio_bar);
info->pixmap.size = 64*1024;
info->pixmap.buf_align = 8;
info->pixmap.access_align = 32;
info->pixmap.flags = FB_PIXMAP_SYSTEM;
info->pixmap.scan_align = 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;
}
fb->fbdev = info;
par->intel_fb = intel_fb;
par->dev = dev;
/* To allow resizeing without swapping buffers */
printk("allocated %dx%d fb: 0x%08x, bo %p\n", intel_fb->base.width,
intel_fb->base.height, obj_priv->gtt_offset, fbo);
mutex_unlock(&dev->struct_mutex);
return 0;
out_unpin:
i915_gem_object_unpin(fbo);
out_unref:
drm_gem_object_unreference(fbo);
mutex_unlock(&dev->struct_mutex);
out:
return ret;
}
static int intelfb_multi_fb_probe_crtc(struct drm_device *dev, struct drm_crtc *crtc)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
struct intel_framebuffer *intel_fb;
struct drm_framebuffer *fb;
struct drm_connector *connector;
struct fb_info *info;
struct intelfb_par *par;
struct drm_mode_set *modeset;
unsigned int width, height;
int new_fb = 0;
int ret, i, conn_count;
if (!drm_helper_crtc_in_use(crtc))
return 0;
if (!crtc->desired_mode)
return 0;
width = crtc->desired_mode->hdisplay;
height = crtc->desired_mode->vdisplay;
/* is there an fb bound to this crtc already */
if (!intel_crtc->mode_set.fb) {
ret = intelfb_create(dev, width, height, width, height, &intel_fb);
if (ret)
return -EINVAL;
new_fb = 1;
} else {
fb = intel_crtc->mode_set.fb;
intel_fb = to_intel_framebuffer(fb);
if ((intel_fb->base.width < width) || (intel_fb->base.height < height))
return -EINVAL;
}
info = intel_fb->base.fbdev;
par = info->par;
modeset = &intel_crtc->mode_set;
modeset->fb = &intel_fb->base;
conn_count = 0;
list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
if (connector->encoder)
if (connector->encoder->crtc == modeset->crtc) {
modeset->connectors[conn_count] = connector;
conn_count++;
if (conn_count > INTELFB_CONN_LIMIT)
BUG();
}
}
for (i = conn_count; i < INTELFB_CONN_LIMIT; i++)
modeset->connectors[i] = NULL;
par->crtc_ids[0] = crtc->base.id;
modeset->num_connectors = conn_count;
if (modeset->crtc->desired_mode) {
if (modeset->mode)
drm_mode_destroy(dev, modeset->mode);
modeset->mode = drm_mode_duplicate(dev,
modeset->crtc->desired_mode);
}
par->crtc_count = 1;
if (new_fb) {
info->var.pixclock = -1;
if (register_framebuffer(info) < 0)
return -EINVAL;
} else
intelfb_set_par(info);
printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
info->fix.id);
/* Switch back to kernel console on panic */
kernelfb_mode = *modeset;
atomic_notifier_chain_register(&panic_notifier_list, &paniced);
printk(KERN_INFO "registered panic notifier\n");
return 0;
}
static int intelfb_multi_fb_probe(struct drm_device *dev)
{
struct drm_crtc *crtc;
int ret = 0;
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
ret = intelfb_multi_fb_probe_crtc(dev, crtc);
if (ret)
return ret;
}
return ret;
}
static int intelfb_single_fb_probe(struct drm_device *dev)
{
struct drm_crtc *crtc;
struct drm_connector *connector;
unsigned int fb_width = (unsigned)-1, fb_height = (unsigned)-1;
unsigned int surface_width = 0, surface_height = 0;
int new_fb = 0;
int crtc_count = 0;
int ret, i, conn_count = 0;
struct intel_framebuffer *intel_fb;
struct fb_info *info;
struct intelfb_par *par;
struct drm_mode_set *modeset = NULL;
DRM_DEBUG("\n");
/* Get a count of crtcs now in use and new min/maxes width/heights */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
if (!drm_helper_crtc_in_use(crtc))
continue;
crtc_count++;
if (!crtc->desired_mode)
continue;
/* Smallest mode determines console size... */
if (crtc->desired_mode->hdisplay < fb_width)
fb_width = crtc->desired_mode->hdisplay;
if (crtc->desired_mode->vdisplay < fb_height)
fb_height = crtc->desired_mode->vdisplay;
/* ... but largest for memory allocation dimensions */
if (crtc->desired_mode->hdisplay > surface_width)
surface_width = crtc->desired_mode->hdisplay;
if (crtc->desired_mode->vdisplay > surface_height)
surface_height = crtc->desired_mode->vdisplay;
}
if (crtc_count == 0 || fb_width == -1 || fb_height == -1) {
/* hmm everyone went away - assume VGA cable just fell out
and will come back later. */
DRM_DEBUG("no CRTCs available?\n");
return 0;
}
//fail
/* Find the fb for our new config */
if (list_empty(&dev->mode_config.fb_kernel_list)) {
DRM_DEBUG("creating new fb (console size %dx%d, "
"buffer size %dx%d)\n", fb_width, fb_height,
surface_width, surface_height);
ret = intelfb_create(dev, fb_width, fb_height, surface_width,
surface_height, &intel_fb);
if (ret)
return -EINVAL;
new_fb = 1;
} else {
struct drm_framebuffer *fb;
fb = list_first_entry(&dev->mode_config.fb_kernel_list,
struct drm_framebuffer, filp_head);
intel_fb = to_intel_framebuffer(fb);
/* if someone hotplugs something bigger than we have already
* allocated, we are pwned. As really we can't resize an
* fbdev that is in the wild currently due to fbdev not really
* being designed for the lower layers moving stuff around
* under it.
* - so in the grand style of things - punt.
*/
if ((fb->width < surface_width) ||
(fb->height < surface_height)) {
DRM_ERROR("fb not large enough for console\n");
return -EINVAL;
}
}
// fail
info = intel_fb->base.fbdev;
par = info->par;
crtc_count = 0;
/*
* For each CRTC, set up the connector list for the CRTC's mode
* set configuration.
*/
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
modeset = &intel_crtc->mode_set;
modeset->fb = &intel_fb->base;
conn_count = 0;
list_for_each_entry(connector, &dev->mode_config.connector_list,
head) {
if (!connector->encoder)
continue;
if(connector->encoder->crtc == modeset->crtc) {
modeset->connectors[conn_count++] = connector;
if (conn_count > INTELFB_CONN_LIMIT)
BUG();
}
}
/* Zero out remaining connector pointers */
for (i = conn_count; i < INTELFB_CONN_LIMIT; i++)
modeset->connectors[i] = NULL;
par->crtc_ids[crtc_count++] = crtc->base.id;
modeset->num_connectors = conn_count;
if (modeset->crtc->desired_mode) {
if (modeset->mode)
drm_mode_destroy(dev, modeset->mode);
modeset->mode = drm_mode_duplicate(dev,
modeset->crtc->desired_mode);
}
}
par->crtc_count = crtc_count;
if (new_fb) {
info->var.pixclock = -1;
if (register_framebuffer(info) < 0)
return -EINVAL;
} else
intelfb_set_par(info);
printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
info->fix.id);
/* Switch back to kernel console on panic */
kernelfb_mode = *modeset;
atomic_notifier_chain_register(&panic_notifier_list, &paniced);
printk(KERN_INFO "registered panic notifier\n");
return 0;
}
/**
* intelfb_restore - restore the framebuffer console (kernel) config
*
* Restore's the kernel's fbcon mode, used for lastclose & panic paths.
*/
void intelfb_restore(void)
{
drm_crtc_helper_set_config(&kernelfb_mode);
}
static void intelfb_restore_work_fn(struct work_struct *ignored)
{
intelfb_restore();
}
static DECLARE_WORK(intelfb_restore_work, intelfb_restore_work_fn);
static void intelfb_sysrq(int dummy1, struct tty_struct *dummy3)
{
schedule_work(&intelfb_restore_work);
}
static struct sysrq_key_op sysrq_intelfb_restore_op = {
.handler = intelfb_sysrq,
.help_msg = "force-fb(V)",
.action_msg = "Restore framebuffer console",
};
int intelfb_probe(struct drm_device *dev)
{
int ret;
DRM_DEBUG("\n");
/* something has changed in the lower levels of hell - deal with it
here */
/* two modes : a) 1 fb to rule all crtcs.
b) one fb per crtc.
two actions 1) new connected device
2) device removed.
case a/1 : if the fb surface isn't big enough - resize the surface fb.
if the fb size isn't big enough - resize fb into surface.
if everything big enough configure the new crtc/etc.
case a/2 : undo the configuration
possibly resize down the fb to fit the new configuration.
case b/1 : see if it is on a new crtc - setup a new fb and add it.
case b/2 : teardown the new fb.
*/
/* mode a first */
/* search for an fb */
if (i915_fbpercrtc == 1) {
ret = intelfb_multi_fb_probe(dev);
} else {
ret = intelfb_single_fb_probe(dev);
}
register_sysrq_key('v', &sysrq_intelfb_restore_op);
return ret;
}
EXPORT_SYMBOL(intelfb_probe);
int intelfb_remove(struct drm_device *dev, struct drm_framebuffer *fb)
{
struct fb_info *info;
if (!fb)
return -EINVAL;
info = fb->fbdev;
if (info) {
unregister_framebuffer(info);
iounmap(info->screen_base);
framebuffer_release(info);
}
atomic_notifier_chain_unregister(&panic_notifier_list, &paniced);
memset(&kernelfb_mode, 0, sizeof(struct drm_mode_set));
return 0;
}
EXPORT_SYMBOL(intelfb_remove);
MODULE_LICENSE("GPL and additional rights");