/* * 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/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" static struct fb_ops intelfb_ops = {	.owner = THIS_MODULE,	.fb_check_var = drm_fb_helper_check_var,	.fb_set_par = drm_fb_helper_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_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 drm_device *dev = helper->dev;	struct drm_i915_private *dev_priv = dev->dev_private;	struct fb_info *info;	struct drm_framebuffer *fb;	struct drm_mode_fb_cmd2 mode_cmd = {};	struct drm_i915_gem_object *obj;	struct device *device = &dev->pdev->dev;	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 = i915_gem_object_create_stolen(dev, size);	if (obj == NULL)		obj = i915_gem_alloc_object(dev, size);	if (!obj) {		DRM_ERROR("failed to allocate framebuffer\n");		ret = -ENOMEM;		goto out;	} 	mutex_lock(&dev->struct_mutex); 	/* Flush everything out, we'll be doing GTT only from now on */	ret = intel_pin_and_fence_fb_obj(dev, obj, NULL);	if (ret) {		DRM_ERROR("failed to pin fb: %d\n", ret);		goto out_unref;	} 	info = framebuffer_alloc(0, device);	if (!info) {		ret = -ENOMEM;		goto out_unpin;	} 	info->par = helper; 	ret = intel_framebuffer_init(dev, &ifbdev->ifb, &mode_cmd, obj);	if (ret)		goto out_unpin; 	fb = &ifbdev->ifb.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; 	ret = fb_alloc_cmap(&info->cmap, 256, 0);	if (ret) {		ret = -ENOMEM;		goto out_unpin;	}	/* 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->fix.smem_start = dev->mode_config.fb_base + i915_gem_obj_ggtt_offset(obj);	info->fix.smem_len = size; 	info->screen_base =		ioremap_wc(dev_priv->gtt.mappable_base + i915_gem_obj_ggtt_offset(obj),			   size);	if (!info->screen_base) {		ret = -ENOSPC;		goto out_unpin;	}	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); 	/* If the object is shmemfs backed, it will have given us zeroed pages.	 * If the object is stolen however, it will be full of whatever	 * garbage was left in there.	 */	if (ifbdev->ifb.obj->stolen)		memset_io(info->screen_base, 0, info->screen_size); 	/* 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);	vga_switcheroo_client_fb_set(dev->pdev, info);	return 0; out_unpin:	i915_gem_object_unpin(obj);out_unref:	drm_gem_object_unreference(&obj->base);	mutex_unlock(&dev->struct_mutex);out:	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_funcs intel_fb_helper_funcs = {	.gamma_set = intel_crtc_fb_gamma_set,	.gamma_get = intel_crtc_fb_gamma_get,	.fb_probe = intelfb_create,}; static void intel_fbdev_destroy(struct drm_device *dev,				struct intel_fbdev *ifbdev){	if (ifbdev->helper.fbdev) {		struct fb_info *info = ifbdev->helper.fbdev; 		unregister_framebuffer(info);		iounmap(info->screen_base);		if (info->cmap.len)			fb_dealloc_cmap(&info->cmap); 		framebuffer_release(info);	} 	drm_fb_helper_fini(&ifbdev->helper); 	drm_framebuffer_unregister_private(&ifbdev->ifb.base);	intel_framebuffer_fini(&ifbdev->ifb);} int intel_fbdev_init(struct drm_device *dev){	struct intel_fbdev *ifbdev;	struct drm_i915_private *dev_priv = dev->dev_private;	int ret; 	ifbdev = kzalloc(sizeof(*ifbdev), GFP_KERNEL);	if (!ifbdev)		return -ENOMEM; 	dev_priv->fbdev = ifbdev;	ifbdev->helper.funcs = &intel_fb_helper_funcs; 	ret = drm_fb_helper_init(dev, &ifbdev->helper,				 INTEL_INFO(dev)->num_pipes,				 4);	if (ret) {		kfree(ifbdev);		return ret;	} 	drm_fb_helper_single_add_all_connectors(&ifbdev->helper); 	return 0;} void intel_fbdev_initial_config(struct drm_device *dev){	struct drm_i915_private *dev_priv = dev->dev_private; 	/* Due to peculiar init order wrt to hpd handling this is separate. */	drm_fb_helper_initial_config(&dev_priv->fbdev->helper, 32);} void intel_fbdev_fini(struct drm_device *dev){	struct drm_i915_private *dev_priv = dev->dev_private;	if (!dev_priv->fbdev)		return; 	intel_fbdev_destroy(dev, dev_priv->fbdev);	kfree(dev_priv->fbdev);	dev_priv->fbdev = NULL;} void intel_fbdev_set_suspend(struct drm_device *dev, int state){	struct drm_i915_private *dev_priv = dev->dev_private;	struct intel_fbdev *ifbdev = dev_priv->fbdev;	struct fb_info *info; 	if (!ifbdev)		return; 	info = ifbdev->helper.fbdev; 	/* On resume from hibernation: If the object is shmemfs backed, it has	 * been restored from swap. If the object is stolen however, it will be	 * full of whatever garbage was left in there.	 */	if (state == FBINFO_STATE_RUNNING && ifbdev->ifb.obj->stolen)		memset_io(info->screen_base, 0, info->screen_size); 	fb_set_suspend(info, state);} MODULE_LICENSE("GPL and additional rights"); void intel_fbdev_output_poll_changed(struct drm_device *dev){	struct drm_i915_private *dev_priv = dev->dev_private;	drm_fb_helper_hotplug_event(&dev_priv->fbdev->helper);} void intel_fbdev_restore_mode(struct drm_device *dev){	int ret;	struct drm_i915_private *dev_priv = dev->dev_private; 	if (INTEL_INFO(dev)->num_pipes == 0)		return; 	drm_modeset_lock_all(dev); 	ret = drm_fb_helper_restore_fbdev_mode(&dev_priv->fbdev->helper);	if (ret)		DRM_DEBUG("failed to restore crtc mode\n"); 	drm_modeset_unlock_all(dev);}