/* * 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/console.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/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 "intel_frontbuffer.h"#include <drm/i915_drm.h>#include "i915_drv.h" static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev){ struct drm_i915_gem_object *obj = ifbdev->fb->obj; unsigned int origin = ifbdev->vma->fence ? ORIGIN_GTT : ORIGIN_CPU; intel_fb_obj_invalidate(obj, origin);} 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) intel_fbdev_invalidate(ifbdev); return ret;} static int intel_fbdev_blank(int blank, 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_blank(blank, info); if (ret == 0) intel_fbdev_invalidate(ifbdev); return ret;} static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 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_pan_display(var, info); if (ret == 0) intel_fbdev_invalidate(ifbdev); return ret;} static struct fb_ops intelfb_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, .fb_set_par = intel_fbdev_set_par, .fb_fillrect = drm_fb_helper_cfb_fillrect, .fb_copyarea = drm_fb_helper_cfb_copyarea, .fb_imageblit = drm_fb_helper_cfb_imageblit, .fb_pan_display = intel_fbdev_pan_display, .fb_blank = intel_fbdev_blank,}; 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_i915_private *dev_priv = to_i915(dev); struct i915_ggtt *ggtt = &dev_priv->ggtt; 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 = PAGE_ALIGN(size); /* If the FB is too big, just don't use it since fbdev is not very * important and we should probably use that space with FBC or other * features. */ obj = NULL; if (size * 2 < ggtt->stolen_usable_size) obj = i915_gem_object_create_stolen(dev_priv, size); if (obj == NULL) obj = i915_gem_object_create(dev_priv, size); if (IS_ERR(obj)) { DRM_ERROR("failed to allocate framebuffer\n"); ret = PTR_ERR(obj); goto err; } fb = intel_framebuffer_create(obj, &mode_cmd); if (IS_ERR(fb)) { ret = PTR_ERR(fb); goto err_obj; } ifbdev->fb = to_intel_framebuffer(fb); return 0; err_obj: i915_gem_object_put(obj);err: 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 = to_i915(dev); struct pci_dev *pdev = dev_priv->drm.pdev; struct i915_ggtt *ggtt = &dev_priv->ggtt; struct fb_info *info; struct drm_framebuffer *fb; struct i915_vma *vma; bool prealloc = false; void __iomem *vaddr; int ret; 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) return ret; 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; } mutex_lock(&dev->struct_mutex); /* Pin the GGTT vma for our access via info->screen_base. * This also validates that any existing fb inherited from the * BIOS is suitable for own access. */ vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, DRM_MODE_ROTATE_0); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto out_unlock; } info = drm_fb_helper_alloc_fbi(helper); if (IS_ERR(info)) { DRM_ERROR("Failed to allocate fb_info\n"); ret = PTR_ERR(info); goto out_unpin; } info->par = helper; fb = &ifbdev->fb->base; ifbdev->helper.fb = fb; 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->ranges[0].base = dev->mode_config.fb_base; info->apertures->ranges[0].size = ggtt->mappable_end; info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma); info->fix.smem_len = vma->node.size; vaddr = i915_vma_pin_iomap(vma); if (IS_ERR(vaddr)) { DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); ret = PTR_ERR(vaddr); goto out_unpin; } info->screen_base = vaddr; info->screen_size = vma->node.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->format->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 (intel_fb->obj->stolen && !prealloc) 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%08x\n", fb->width, fb->height, i915_ggtt_offset(vma)); ifbdev->vma = vma; mutex_unlock(&dev->struct_mutex); vga_switcheroo_client_fb_set(pdev, info); return 0; out_unpin: intel_unpin_fb_vma(vma);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_i915_private *dev_priv = to_i915(fb_helper->dev); unsigned long conn_configured, conn_seq, mask; unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG); int i, j; bool *save_enabled; bool fallback = true; int num_connectors_enabled = 0; int num_connectors_detected = 0; save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); if (!save_enabled) return false; memcpy(save_enabled, enabled, count); mask = GENMASK(count - 1, 0); conn_configured = 0;retry: conn_seq = conn_configured; for (i = 0; i < count; i++) { struct drm_fb_helper_connector *fb_conn; struct drm_connector *connector; struct drm_encoder *encoder; struct drm_fb_helper_crtc *new_crtc; struct intel_crtc *intel_crtc; fb_conn = fb_helper->connector_info[i]; connector = fb_conn->connector; if (conn_configured & BIT(i)) continue; if (conn_seq == 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 |= BIT(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->state->best_encoder; if (!encoder || WARN_ON(!connector->state->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 |= BIT(i); continue; } num_connectors_enabled++; intel_crtc = to_intel_crtc(connector->state->crtc); for (j = 0; j < 256; j++) { intel_crtc->lut_r[j] = j; intel_crtc->lut_g[j] = j; intel_crtc->lut_b[j] = j; } new_crtc = intel_fb_helper_crtc(fb_helper, connector->state->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 < 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); /* 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 * code puts a mode derived from the post-pfit timings * into crtc->mode this works out correctly. * * This is crtc->mode and not crtc->state->mode for the * fastboot check to work correctly. crtc_state->mode has * I915_MODE_FLAG_INHERITED, which we clear to force check * state. */ DRM_DEBUG_KMS("looking for current mode on connector %s\n", connector->name); modes[i] = &connector->state->crtc->mode; } crtcs[i] = new_crtc; DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", connector->name, connector->state->crtc->base.id, connector->state->crtc->name, modes[i]->hdisplay, modes[i]->vdisplay, modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); fallback = false; conn_configured |= BIT(i); } if ((conn_configured & mask) != mask && conn_configured != conn_seq) 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 &&Lines 1–500 of 833. Load more
/* * 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/console.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/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 "intel_frontbuffer.h" #include <drm/i915_drm.h> #include "i915_drv.h" static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev) { struct drm_i915_gem_object *obj = ifbdev->fb->obj; unsigned int origin = ifbdev->vma->fence ? ORIGIN_GTT : ORIGIN_CPU; intel_fb_obj_invalidate(obj, origin); } 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) intel_fbdev_invalidate(ifbdev); return ret; } static int intel_fbdev_blank(int blank, 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_blank(blank, info); if (ret == 0) intel_fbdev_invalidate(ifbdev); return ret; } static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, 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_pan_display(var, info); if (ret == 0) intel_fbdev_invalidate(ifbdev); return ret; } static struct fb_ops intelfb_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, .fb_set_par = intel_fbdev_set_par, .fb_fillrect = drm_fb_helper_cfb_fillrect, .fb_copyarea = drm_fb_helper_cfb_copyarea, .fb_imageblit = drm_fb_helper_cfb_imageblit, .fb_pan_display = intel_fbdev_pan_display, .fb_blank = intel_fbdev_blank, }; 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_i915_private *dev_priv = to_i915(dev); struct i915_ggtt *ggtt = &dev_priv->ggtt; 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 = PAGE_ALIGN(size); /* If the FB is too big, just don't use it since fbdev is not very * important and we should probably use that space with FBC or other * features. */ obj = NULL; if (size * 2 < ggtt->stolen_usable_size) obj = i915_gem_object_create_stolen(dev_priv, size); if (obj == NULL) obj = i915_gem_object_create(dev_priv, size); if (IS_ERR(obj)) { DRM_ERROR("failed to allocate framebuffer\n"); ret = PTR_ERR(obj); goto err; } fb = intel_framebuffer_create(obj, &mode_cmd); if (IS_ERR(fb)) { ret = PTR_ERR(fb); goto err_obj; } ifbdev->fb = to_intel_framebuffer(fb); return 0; err_obj: i915_gem_object_put(obj); err: 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 = to_i915(dev); struct pci_dev *pdev = dev_priv->drm.pdev; struct i915_ggtt *ggtt = &dev_priv->ggtt; struct fb_info *info; struct drm_framebuffer *fb; struct i915_vma *vma; bool prealloc = false; void __iomem *vaddr; int ret; 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) return ret; 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; } mutex_lock(&dev->struct_mutex); /* Pin the GGTT vma for our access via info->screen_base. * This also validates that any existing fb inherited from the * BIOS is suitable for own access. */ vma = intel_pin_and_fence_fb_obj(&ifbdev->fb->base, DRM_MODE_ROTATE_0); if (IS_ERR(vma)) { ret = PTR_ERR(vma); goto out_unlock; } info = drm_fb_helper_alloc_fbi(helper); if (IS_ERR(info)) { DRM_ERROR("Failed to allocate fb_info\n"); ret = PTR_ERR(info); goto out_unpin; } info->par = helper; fb = &ifbdev->fb->base; ifbdev->helper.fb = fb; 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->ranges[0].base = dev->mode_config.fb_base; info->apertures->ranges[0].size = ggtt->mappable_end; info->fix.smem_start = dev->mode_config.fb_base + i915_ggtt_offset(vma); info->fix.smem_len = vma->node.size; vaddr = i915_vma_pin_iomap(vma); if (IS_ERR(vaddr)) { DRM_ERROR("Failed to remap framebuffer into virtual memory\n"); ret = PTR_ERR(vaddr); goto out_unpin; } info->screen_base = vaddr; info->screen_size = vma->node.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->format->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 (intel_fb->obj->stolen && !prealloc) 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%08x\n", fb->width, fb->height, i915_ggtt_offset(vma)); ifbdev->vma = vma; mutex_unlock(&dev->struct_mutex); vga_switcheroo_client_fb_set(pdev, info); return 0; out_unpin: intel_unpin_fb_vma(vma); 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_i915_private *dev_priv = to_i915(fb_helper->dev); unsigned long conn_configured, conn_seq, mask; unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG); int i, j; bool *save_enabled; bool fallback = true; int num_connectors_enabled = 0; int num_connectors_detected = 0; save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); if (!save_enabled) return false; memcpy(save_enabled, enabled, count); mask = GENMASK(count - 1, 0); conn_configured = 0; retry: conn_seq = conn_configured; for (i = 0; i < count; i++) { struct drm_fb_helper_connector *fb_conn; struct drm_connector *connector; struct drm_encoder *encoder; struct drm_fb_helper_crtc *new_crtc; struct intel_crtc *intel_crtc; fb_conn = fb_helper->connector_info[i]; connector = fb_conn->connector; if (conn_configured & BIT(i)) continue; if (conn_seq == 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 |= BIT(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->state->best_encoder; if (!encoder || WARN_ON(!connector->state->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 |= BIT(i); continue; } num_connectors_enabled++; intel_crtc = to_intel_crtc(connector->state->crtc); for (j = 0; j < 256; j++) { intel_crtc->lut_r[j] = j; intel_crtc->lut_g[j] = j; intel_crtc->lut_b[j] = j; } new_crtc = intel_fb_helper_crtc(fb_helper, connector->state->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 < 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); /* 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 * code puts a mode derived from the post-pfit timings * into crtc->mode this works out correctly. * * This is crtc->mode and not crtc->state->mode for the * fastboot check to work correctly. crtc_state->mode has * I915_MODE_FLAG_INHERITED, which we clear to force check * state. */ DRM_DEBUG_KMS("looking for current mode on connector %s\n", connector->name); modes[i] = &connector->state->crtc->mode; } crtcs[i] = new_crtc; DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", connector->name, connector->state->crtc->base.id, connector->state->crtc->name, modes[i]->hdisplay, modes[i]->vdisplay, modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" :""); fallback = false; conn_configured |= BIT(i); } if ((conn_configured & mask) != mask && conn_configured != conn_seq) 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 &&