/*
* 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/async.h>
#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/sysrq.h>
#include <linux/delay.h>
#include <linux/fb.h>
//#include <linux/init.h>
//#include <linux/vga_switcheroo.h>
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>
#include "intel_drv.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"
struct fb_info *framebuffer_alloc(size_t size, struct device *dev)
{
#define BYTES_PER_LONG (BITS_PER_LONG/8)
#define PADDING (BYTES_PER_LONG - (sizeof(struct fb_info) % BYTES_PER_LONG))
int fb_info_size = sizeof(struct fb_info);
struct fb_info *info;
char *p;
if (size)
fb_info_size += PADDING;
p = kzalloc(fb_info_size + size, GFP_KERNEL);
if (!p)
return NULL;
info = (struct fb_info *) p;
if (size)
info->par = p + fb_info_size;
return info;
#undef PADDING
#undef BYTES_PER_LONG
}
static int intel_fbdev_set_par(struct fb_info *info)
{
struct drm_fb_helper *fb_helper = info->par;
struct intel_fbdev *ifbdev =
container_of(fb_helper, struct intel_fbdev, helper);
int ret;
ret = drm_fb_helper_set_par(info);
if (ret == 0) {
/*
* FIXME: fbdev presumes that all callbacks also work from
* atomic contexts and relies on that for emergency oops
* printing. KMS totally doesn't do that and the locking here is
* by far not the only place this goes wrong. Ignore this for
* now until we solve this for real.
*/
mutex_lock(&fb_helper->dev->struct_mutex);
ret = i915_gem_object_set_to_gtt_domain(ifbdev->fb->obj,
true);
mutex_unlock(&fb_helper->dev->struct_mutex);
}
return ret;
}
static struct fb_ops intelfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = intel_fbdev_set_par,
// .fb_fillrect = cfb_fillrect,
// .fb_copyarea = cfb_copyarea,
// .fb_imageblit = cfb_imageblit,
// .fb_pan_display = drm_fb_helper_pan_display,
.fb_blank = drm_fb_helper_blank,
// .fb_setcmap = drm_fb_helper_setcmap,
// .fb_debug_enter = drm_fb_helper_debug_enter,
// .fb_debug_leave = drm_fb_helper_debug_leave,
};
static int intelfb_alloc(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct intel_fbdev *ifbdev =
container_of(helper, struct intel_fbdev, helper);
struct drm_framebuffer *fb;
struct drm_device *dev = helper->dev;
struct drm_mode_fb_cmd2 mode_cmd = {};
struct drm_i915_gem_object *obj;
int size, ret;
/* we don't do packed 24bpp */
if (sizes->surface_bpp == 24)
sizes->surface_bpp = 32;
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = ALIGN(mode_cmd.width *
DIV_ROUND_UP(sizes->surface_bpp, 8), 64);
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
size = mode_cmd.pitches[0] * mode_cmd.height;
size = ALIGN(size, PAGE_SIZE);
obj = main_fb_obj;
obj->stride = mode_cmd.pitches[0];
if (!obj) {
DRM_ERROR("failed to allocate framebuffer\n");
ret = -ENOMEM;
goto out;
}
fb = __intel_framebuffer_create(dev, &mode_cmd, obj);
if (IS_ERR(fb)) {
ret = PTR_ERR(fb);
goto out_unref;
}
/* Flush everything out, we'll be doing GTT only from now on */
ret = intel_pin_and_fence_fb_obj(NULL, fb, NULL);
if (ret) {
DRM_ERROR("failed to pin obj: %d\n", ret);
goto out_fb;
}
ifbdev->fb = to_intel_framebuffer(fb);
return 0;
out_fb:
drm_framebuffer_remove(fb);
out_unref:
drm_gem_object_unreference(&obj->base);
out:
return ret;
}
static int intelfb_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct intel_fbdev *ifbdev =
container_of(helper, struct intel_fbdev, helper);
struct intel_framebuffer *intel_fb = ifbdev->fb;
struct drm_device *dev = helper->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct fb_info *info;
struct drm_framebuffer *fb;
struct drm_i915_gem_object *obj;
int size, ret;
bool prealloc = false;
mutex_lock(&dev->struct_mutex);
if (intel_fb &&
(sizes->fb_width > intel_fb->base.width ||
sizes->fb_height > intel_fb->base.height)) {
DRM_DEBUG_KMS("BIOS fb too small (%dx%d), we require (%dx%d),"
" releasing it\n",
intel_fb->base.width, intel_fb->base.height,
sizes->fb_width, sizes->fb_height);
drm_framebuffer_unreference(&intel_fb->base);
intel_fb = ifbdev->fb = NULL;
}
if (!intel_fb || WARN_ON(!intel_fb->obj)) {
DRM_DEBUG_KMS("no BIOS fb, allocating a new one\n");
ret = intelfb_alloc(helper, sizes);
if (ret)
goto out_unlock;
intel_fb = ifbdev->fb;
} else {
DRM_DEBUG_KMS("re-using BIOS fb\n");
prealloc = true;
sizes->fb_width = intel_fb->base.width;
sizes->fb_height = intel_fb->base.height;
}
obj = intel_fb->obj;
size = obj->base.size;
info = framebuffer_alloc(0, &dev->pdev->dev);
if (!info) {
ret = -ENOMEM;
goto out_unpin;
}
info->par = helper;
fb = &ifbdev->fb->base;
ifbdev->helper.fb = fb;
ifbdev->helper.fbdev = info;
strcpy(info
->fix.
id, "inteldrmfb");
info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
info->fbops = &intelfb_ops;
/* setup aperture base/size for vesafb takeover */
info->apertures = alloc_apertures(1);
if (!info->apertures) {
ret = -ENOMEM;
goto out_unpin;
}
info->apertures->ranges[0].base = dev->mode_config.fb_base;
info->apertures->ranges[0].size = dev_priv->gtt.mappable_end;
info->screen_base = (void*) 0xFE000000;
info->screen_size = size;
/* This driver doesn't need a VT switch to restore the mode on resume */
info->skip_vt_switch = true;
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width, sizes->fb_height);
/* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
DRM_DEBUG_KMS("allocated %dx%d fb: 0x%08lx, bo %p\n",
fb->width, fb->height,
i915_gem_obj_ggtt_offset(obj), obj);
mutex_unlock(&dev->struct_mutex);
return 0;
out_unpin:
i915_gem_object_ggtt_unpin(obj);
drm_gem_object_unreference(&obj->base);
out_unlock:
mutex_unlock(&dev->struct_mutex);
return ret;
}
/** Sets the color ramps on behalf of RandR */
static void intel_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
u16 blue, int regno)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
intel_crtc->lut_r[regno] = red >> 8;
intel_crtc->lut_g[regno] = green >> 8;
intel_crtc->lut_b[regno] = blue >> 8;
}
static void intel_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, int regno)
{
struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
*red = intel_crtc->lut_r[regno] << 8;
*green = intel_crtc->lut_g[regno] << 8;
*blue = intel_crtc->lut_b[regno] << 8;
}
static struct drm_fb_helper_crtc *
intel_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc)
{
int i;
for (i = 0; i < fb_helper->crtc_count; i++)
if (fb_helper->crtc_info[i].mode_set.crtc == crtc)
return &fb_helper->crtc_info[i];
return NULL;
}
/*
* Try to read the BIOS display configuration and use it for the initial
* fb configuration.
*
* The BIOS or boot loader will generally create an initial display
* configuration for us that includes some set of active pipes and displays.
* This routine tries to figure out which pipes and connectors are active
* and stuffs them into the crtcs and modes array given to us by the
* drm_fb_helper code.
*
* The overall sequence is:
* intel_fbdev_init - from driver load
* intel_fbdev_init_bios - initialize the intel_fbdev using BIOS data
* drm_fb_helper_init - build fb helper structs
* drm_fb_helper_single_add_all_connectors - more fb helper structs
* intel_fbdev_initial_config - apply the config
* drm_fb_helper_initial_config - call ->probe then register_framebuffer()
* drm_setup_crtcs - build crtc config for fbdev
* intel_fb_initial_config - find active connectors etc
* drm_fb_helper_single_fb_probe - set up fbdev
* intelfb_create - re-use or alloc fb, build out fbdev structs
*
* Note that we don't make special consideration whether we could actually
* switch to the selected modes without a full modeset. E.g. when the display
* is in VGA mode we need to recalculate watermarks and set a new high-res
* framebuffer anyway.
*/
static bool intel_fb_initial_config(struct drm_fb_helper *fb_helper,
struct drm_fb_helper_crtc **crtcs,
struct drm_display_mode **modes,
struct drm_fb_offset *offsets,
bool *enabled, int width, int height)
{
struct drm_device *dev = fb_helper->dev;
int i, j;
bool *save_enabled;
bool fallback = true;
int num_connectors_enabled = 0;
int num_connectors_detected = 0;
uint64_t conn_configured = 0, mask;
int pass = 0;
save_enabled = kcalloc(dev->mode_config.num_connector, sizeof(bool),
GFP_KERNEL);
if (!save_enabled)
return false;
memcpy(save_enabled
, enabled
, dev
->mode_config.
num_connector); mask = (1 << fb_helper->connector_count) - 1;
retry:
for (i = 0; i < fb_helper->connector_count; i++) {
struct drm_fb_helper_connector *fb_conn;
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_fb_helper_crtc *new_crtc;
fb_conn = fb_helper->connector_info[i];
connector = fb_conn->connector;
if (conn_configured & (1 << i))
continue;
if (pass == 0 && !connector->has_tile)
continue;
if (connector->status == connector_status_connected)
num_connectors_detected++;
if (!enabled[i]) {
DRM_DEBUG_KMS("connector %s not enabled, skipping\n",
connector->name);
conn_configured |= (1 << i);
continue;
}
if (connector->force == DRM_FORCE_OFF) {
DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n",
connector->name);
enabled[i] = false;
continue;
}
encoder = connector->encoder;
if (!encoder || WARN_ON(!encoder->crtc)) {
if (connector->force > DRM_FORCE_OFF)
goto bail;
DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n",
connector->name);
enabled[i] = false;
conn_configured |= (1 << i);
continue;
}
num_connectors_enabled++;
new_crtc = intel_fb_helper_crtc(fb_helper, encoder->crtc);
/*
* Make sure we're not trying to drive multiple connectors
* with a single CRTC, since our cloning support may not
* match the BIOS.
*/
for (j = 0; j < fb_helper->connector_count; j++) {
if (crtcs[j] == new_crtc) {
DRM_DEBUG_KMS("fallback: cloned configuration\n");
goto bail;
}
}
DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n",
connector->name);
/* go for command line mode first */
modes[i] = drm_pick_cmdline_mode(fb_conn, width, height);
/* try for preferred next */
if (!modes[i]) {
DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n",
connector->name, connector->has_tile);
modes[i] = drm_has_preferred_mode(fb_conn, width,
height);
}
/* No preferred mode marked by the EDID? Are there any modes? */
if (!modes[i] && !list_empty(&connector->modes)) {
DRM_DEBUG_KMS("using first mode listed on connector %s\n",
connector->name);
modes[i] = list_first_entry(&connector->modes,
struct drm_display_mode,
head);
}
/* last resort: use current mode */
if (!modes[i]) {
/*
* IMPORTANT: We want to use the adjusted mode (i.e.
* after the panel fitter upscaling) as the initial
* config, not the input mode, which is what crtc->mode
* usually contains. But since our current fastboot
* code puts a mode derived from the post-pfit timings
* into crtc->mode this works out correctly. We don't
* use hwmode anywhere right now, so use it for this
* since the fb helper layer wants a pointer to
* something we own.
*/
DRM_DEBUG_KMS("looking for current mode on connector %s\n",
connector->name);
intel_mode_from_pipe_config(&encoder->crtc->hwmode,
&to_intel_crtc(encoder->crtc)->config);
modes[i] = &encoder->crtc->hwmode;
}
crtcs[i] = new_crtc;
DRM_DEBUG_KMS("connector %s on pipe %c [CRTC:%d]: %dx%d%s\n",
connector->name,
pipe_name(to_intel_crtc(encoder->crtc)->pipe),
encoder->crtc->base.id,
modes[i]->hdisplay, modes[i]->vdisplay,
modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :"");
fallback = false;
conn_configured |= (1 << i);
}
if ((conn_configured & mask) != mask) {
pass++;
goto retry;
}
/*
* If the BIOS didn't enable everything it could, fall back to have the
* same user experiencing of lighting up as much as possible like the
* fbdev helper library.
*/
if (num_connectors_enabled != num_connectors_detected &&
num_connectors_enabled < INTEL_INFO(dev)->num_pipes) {
DRM_DEBUG_KMS("fallback: Not all outputs enabled\n");
DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled,
num_connectors_detected);
fallback = true;
}
if (fallback) {
bail:
DRM_DEBUG_KMS("Not using firmware configuration\n");
memcpy(enabled
, save_enabled
, dev
->mode_config.
num_connector); kfree(save_enabled);
return false;
}
kfree(save_enabled);
return true;
}
static const struct drm_fb_helper_funcs intel_fb_helper_funcs = {
.initial_config = intel_fb_initial_config,
.gamma_set = intel_crtc_fb_gamma_set,
.gamma_get = intel_crtc_fb_gamma_get,
.fb_probe = intelfb_create,
};
/*
* Build an intel_fbdev struct using a BIOS allocated framebuffer, if possible.
* The core display code will have read out the current plane configuration,
* so we use that to figure out if there's an object for us to use as the
* fb, and if so, we re-use it for the fbdev configuration.
*
* Note we only support a single fb shared across pipes for boot (mostly for
* fbcon), so we just find the biggest and use that.
*/
static bool intel_fbdev_init_bios(struct drm_device *dev,
struct intel_fbdev *ifbdev)
{
struct intel_framebuffer *fb = NULL;
struct drm_crtc *crtc;
struct intel_crtc *intel_crtc;
struct intel_plane_config *plane_config = NULL;
unsigned int max_size = 0;
if (!i915.fastboot)
return false;
/* Find the largest fb */
for_each_crtc(dev, crtc) {
intel_crtc = to_intel_crtc(crtc);
if (!intel_crtc->active || !crtc->primary->fb) {
DRM_DEBUG_KMS("pipe %c not active or no fb, skipping\n",
pipe_name(intel_crtc->pipe));
continue;
}
if (intel_crtc->plane_config.size > max_size) {
DRM_DEBUG_KMS("found possible fb from plane %c\n",
pipe_name(intel_crtc->pipe));
plane_config = &intel_crtc->plane_config;
fb = to_intel_framebuffer(crtc->primary->fb);
max_size = plane_config->size;
}
}
if (!fb) {
DRM_DEBUG_KMS("no active fbs found, not using BIOS config\n");
goto out;
}
/* Now make sure all the pipes will fit into it */
for_each_crtc(dev, crtc) {
unsigned int cur_size;
intel_crtc = to_intel_crtc(crtc);
if (!intel_crtc->active) {
DRM_DEBUG_KMS("pipe %c not active, skipping\n",
pipe_name(intel_crtc->pipe));
continue;
}
DRM_DEBUG_KMS("checking plane %c for BIOS fb\n",
pipe_name(intel_crtc->pipe));
/*
* See if the plane fb we found above will fit on this
* pipe. Note we need to use the selected fb's pitch and bpp
* rather than the current pipe's, since they differ.
*/
cur_size = intel_crtc->config.adjusted_mode.crtc_hdisplay;
cur_size = cur_size * fb->base.bits_per_pixel / 8;
if (fb->base.pitches[0] < cur_size) {
DRM_DEBUG_KMS("fb not wide enough for plane %c (%d vs %d)\n",
pipe_name(intel_crtc->pipe),
cur_size, fb->base.pitches[0]);
plane_config = NULL;
fb = NULL;
break;
}
cur_size = intel_crtc->config.adjusted_mode.crtc_vdisplay;
cur_size = ALIGN(cur_size, plane_config->tiled ? (IS_GEN2(dev) ? 16 : 8) : 1);
cur_size *= fb->base.pitches[0];
DRM_DEBUG_KMS("pipe %c area: %dx%d, bpp: %d, size: %d\n",
pipe_name(intel_crtc->pipe),
intel_crtc->config.adjusted_mode.crtc_hdisplay,
intel_crtc->config.adjusted_mode.crtc_vdisplay,
fb->base.bits_per_pixel,
cur_size);
if (cur_size > max_size) {
DRM_DEBUG_KMS("fb not big enough for plane %c (%d vs %d)\n",
pipe_name(intel_crtc->pipe),
cur_size, max_size);
plane_config = NULL;
fb = NULL;
break;
}
DRM_DEBUG_KMS("fb big enough for plane %c (%d >= %d)\n",
pipe_name(intel_crtc->pipe),
max_size, cur_size);
}
if (!fb) {
DRM_DEBUG_KMS("BIOS fb not suitable for all pipes, not using\n");
goto out;
}
ifbdev->preferred_bpp = fb->base.bits_per_pixel;
ifbdev->fb = fb;
drm_framebuffer_reference(&ifbdev->fb->base);
/* Final pass to check if any active pipes don't have fbs */
for_each_crtc(dev, crtc) {
intel_crtc = to_intel_crtc(crtc);
if (!intel_crtc->active)
continue;
WARN(!crtc->primary->fb,
"re-used BIOS config but lost an fb on crtc %d\n",
crtc->base.id);
}
DRM_DEBUG_KMS("using BIOS fb for initial console\n");
return true;
out:
return false;
}
int intel_fbdev_init(struct drm_device *dev)
{
struct intel_fbdev *ifbdev;
struct drm_i915_private *dev_priv = dev->dev_private;
int ret;
if (WARN_ON(INTEL_INFO(dev)->num_pipes == 0))
return -ENODEV;
ifbdev = kzalloc(sizeof(struct intel_fbdev), GFP_KERNEL);
if (ifbdev == NULL)
return -ENOMEM;
drm_fb_helper_prepare(dev, &ifbdev->helper, &intel_fb_helper_funcs);
if (!intel_fbdev_init_bios(dev, ifbdev))
ifbdev->preferred_bpp = 32;
ret = drm_fb_helper_init(dev, &ifbdev->helper,
INTEL_INFO(dev)->num_pipes, 4);
if (ret) {
kfree(ifbdev);
return ret;
}
dev_priv->fbdev = ifbdev;
drm_fb_helper_single_add_all_connectors(&ifbdev->helper);
return 0;
}
void intel_fbdev_initial_config(void *data, async_cookie_t cookie)
{
struct drm_i915_private *dev_priv = data;
struct intel_fbdev *ifbdev = dev_priv->fbdev;
/* Due to peculiar init order wrt to hpd handling this is separate. */
drm_fb_helper_initial_config(&ifbdev->helper, ifbdev->preferred_bpp);
}
void intel_fbdev_output_poll_changed(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
if (dev_priv->fbdev)
drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);
}