diff options
27 files changed, 104 insertions, 216 deletions
diff --git a/Documentation/DocBook/gpu.tmpl b/Documentation/DocBook/gpu.tmpl index 7586bf75f62e..b3a04b521b22 100644 --- a/Documentation/DocBook/gpu.tmpl +++ b/Documentation/DocBook/gpu.tmpl @@ -1092,22 +1092,6 @@ int max_width, max_height;</synopsis> operation. </para> </sect2> - <sect2> - <title>Locking</title> - <para> - Beside some lookup structures with their own locking (which is hidden - behind the interface functions) most of the modeset state is protected - by the <code>dev-<mode_config.lock</code> mutex and additionally - per-crtc locks to allow cursor updates, pageflips and similar operations - to occur concurrently with background tasks like output detection. - Operations which cross domains like a full modeset always grab all - locks. Drivers there need to protect resources shared between crtcs with - additional locking. They also need to be careful to always grab the - relevant crtc locks if a modset functions touches crtc state, e.g. for - load detection (which does only grab the <code>mode_config.lock</code> - to allow concurrent screen updates on live crtcs). - </para> - </sect2> </sect1> <!-- Internals: kms initialization and cleanup --> @@ -2845,14 +2829,7 @@ void (*disable_vblank) (struct drm_device *dev, int crtc);</synopsis> <para> Drivers must initialize the vertical blanking handling core with a call to <function>drm_vblank_init</function> in their - <methodname>load</methodname> operation. The function will set the struct - <structname>drm_device</structname> - <structfield>vblank_disable_allowed</structfield> field to 0. This will - keep vertical blanking interrupts enabled permanently until the first mode - set operation, where <structfield>vblank_disable_allowed</structfield> is - set to 1. The reason behind this is not clear. Drivers can set the field - to 1 after <function>calling drm_vblank_init</function> to make vertical - blanking interrupts dynamically managed from the beginning. + <methodname>load</methodname> operation. </para> <para> Vertical blanking interrupts can be enabled by the DRM core or by drivers diff --git a/MAINTAINERS b/MAINTAINERS index 7304d2e37a98..150d52cb983c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -3854,6 +3854,9 @@ T: git git://people.freedesktop.org/~airlied/linux S: Maintained F: drivers/gpu/drm/ F: drivers/gpu/vga/ +F: Documentation/devicetree/bindings/display/ +F: Documentation/devicetree/bindings/gpu/ +F: Documentation/devicetree/bindings/video/ F: Documentation/DocBook/gpu.* F: include/drm/ F: include/uapi/drm/ diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c index b987c63ba8d6..4f909378d581 100644 --- a/drivers/gpu/drm/arm/hdlcd_drv.c +++ b/drivers/gpu/drm/arm/hdlcd_drv.c @@ -316,7 +316,7 @@ static struct drm_driver hdlcd_driver = { .get_vblank_counter = drm_vblank_no_hw_counter, .enable_vblank = hdlcd_enable_vblank, .disable_vblank = hdlcd_disable_vblank, - .gem_free_object = drm_gem_cma_free_object, + .gem_free_object_unlocked = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .dumb_create = drm_gem_cma_dumb_create, .dumb_map_offset = drm_gem_cma_dumb_map_offset, diff --git a/drivers/gpu/drm/cirrus/cirrus_mode.c b/drivers/gpu/drm/cirrus/cirrus_mode.c index d3d8d7bfcc57..0b1a411cb89e 100644 --- a/drivers/gpu/drm/cirrus/cirrus_mode.c +++ b/drivers/gpu/drm/cirrus/cirrus_mode.c @@ -331,9 +331,6 @@ static void cirrus_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, struct cirrus_crtc *cirrus_crtc = to_cirrus_crtc(crtc); int i; - if (size != CIRRUS_LUT_SIZE) - return; - for (i = 0; i < CIRRUS_LUT_SIZE; i++) { cirrus_crtc->lut_r[i] = red[i]; cirrus_crtc->lut_g[i] = green[i]; diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index ddfa0d120e39..939df900dcaa 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -414,6 +414,9 @@ mode_fixup(struct drm_atomic_state *state) for_each_crtc_in_state(state, crtc, crtc_state, i) { const struct drm_crtc_helper_funcs *funcs; + if (!crtc_state->enable) + continue; + if (!crtc_state->mode_changed && !crtc_state->connectors_changed) continue; diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index d2a6d958ca76..37427b2bb9fc 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -5139,6 +5139,9 @@ EXPORT_SYMBOL(drm_mode_connector_attach_encoder); int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, int gamma_size) { + uint16_t *r_base, *g_base, *b_base; + int i; + crtc->gamma_size = gamma_size; crtc->gamma_store = kcalloc(gamma_size, sizeof(uint16_t) * 3, @@ -5148,6 +5151,16 @@ int drm_mode_crtc_set_gamma_size(struct drm_crtc *crtc, return -ENOMEM; } + r_base = crtc->gamma_store; + g_base = r_base + gamma_size; + b_base = g_base + gamma_size; + for (i = 0; i < gamma_size; i++) { + r_base[i] = i << 8; + g_base[i] = i << 8; + b_base[i] = i << 8; + } + + return 0; } EXPORT_SYMBOL(drm_mode_crtc_set_gamma_size); diff --git a/drivers/gpu/drm/drm_edid_load.c b/drivers/gpu/drm/drm_edid_load.c index 9a401aed98e0..622f788bff46 100644 --- a/drivers/gpu/drm/drm_edid_load.c +++ b/drivers/gpu/drm/drm_edid_load.c @@ -271,7 +271,7 @@ int drm_load_edid_firmware(struct drm_connector *connector) * by commas, search through the list looking for one that * matches the connector. * - * If there's one or more that don't't specify a connector, keep + * If there's one or more that doesn't specify a connector, keep * the last one found one as a fallback. */ fwstr = kstrdup(edid_firmware, GFP_KERNEL); diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 7c2eb75db60f..7590df5e2e72 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -1042,7 +1042,6 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, { 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; @@ -1074,38 +1073,10 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, !fb_helper->funcs->gamma_get)) return -EINVAL; - pindex = regno; + WARN_ON(fb->bits_per_pixel != 8); - if (fb->bits_per_pixel == 16) { - pindex = regno << 3; + fb_helper->funcs->gamma_set(crtc, red, green, blue, regno); - 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; } diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 0fac801c18fe..66e5c1e412d3 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -42,10 +42,6 @@ #include <linux/vgaarb.h> #include <linux/export.h> -/* Access macro for slots in vblank timestamp ringbuffer. */ -#define vblanktimestamp(dev, pipe, count) \ - ((dev)->vblank[pipe].time[(count) % DRM_VBLANKTIME_RBSIZE]) - /* Retry timestamp calculation up to 3 times to satisfy * drm_timestamp_precision before giving up. */ @@ -82,29 +78,15 @@ static void store_vblank(struct drm_device *dev, unsigned int pipe, struct timeval *t_vblank, u32 last) { struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; - u32 tslot; assert_spin_locked(&dev->vblank_time_lock); vblank->last = last; - /* All writers hold the spinlock, but readers are serialized by - * the latching of vblank->count below. - */ - tslot = vblank->count + vblank_count_inc; - vblanktimestamp(dev, pipe, tslot) = *t_vblank; - - /* - * vblank timestamp updates are protected on the write side with - * vblank_time_lock, but on the read side done locklessly using a - * sequence-lock on the vblank counter. Ensure correct ordering using - * memory barrriers. We need the barrier both before and also after the - * counter update to synchronize with the next timestamp write. - * The read-side barriers for this are in drm_vblank_count_and_time. - */ - smp_wmb(); + write_seqlock(&vblank->seqlock); + vblank->time = *t_vblank; vblank->count += vblank_count_inc; - smp_wmb(); + write_sequnlock(&vblank->seqlock); } /** @@ -205,7 +187,7 @@ static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe, const struct timeval *t_old; u64 diff_ns; - t_old = &vblanktimestamp(dev, pipe, vblank->count); + t_old = &vblank->time; diff_ns = timeval_to_ns(&t_vblank) - timeval_to_ns(t_old); /* @@ -239,49 +221,6 @@ static void drm_update_vblank_count(struct drm_device *dev, unsigned int pipe, diff = 1; } - /* - * FIMXE: Need to replace this hack with proper seqlocks. - * - * Restrict the bump of the software vblank counter to a safe maximum - * value of +1 whenever there is the possibility that concurrent readers - * of vblank timestamps could be active at the moment, as the current - * implementation of the timestamp caching and updating is not safe - * against concurrent readers for calls to store_vblank() with a bump - * of anything but +1. A bump != 1 would very likely return corrupted - * timestamps to userspace, because the same slot in the cache could - * be concurrently written by store_vblank() and read by one of those - * readers without the read-retry logic detecting the collision. - * - * Concurrent readers can exist when we are called from the - * drm_vblank_off() or drm_vblank_on() functions and other non-vblank- - * irq callers. However, all those calls to us are happening with the - * vbl_lock locked to prevent drm_vblank_get(), so the vblank refcount - * can't increase while we are executing. Therefore a zero refcount at - * this point is safe for arbitrary counter bumps if we are called - * outside vblank irq, a non-zero count is not 100% safe. Unfortunately - * we must also accept a refcount of 1, as whenever we are called from - * drm_vblank_get() -> drm_vblank_enable() the refcount will be 1 and - * we must let that one pass through in order to not lose vblank counts - * during vblank irq off - which would completely defeat the whole - * point of this routine. - * - * Whenever we are called from vblank irq, we have to assume concurrent - * readers exist or can show up any time during our execution, even if - * the refcount is currently zero, as vblank irqs are usually only - * enabled due to the presence of readers, and because when we are called - * from vblank irq we can't hold the vbl_lock to protect us from sudden - * bumps in vblank refcount. Therefore also restrict bumps to +1 when - * called from vblank irq. - */ - if ((diff > 1) && (atomic_read(&vblank->refcount) > 1 || - (flags & DRM_CALLED_FROM_VBLIRQ))) { - DRM_DEBUG_VBL("clamping vblank bump to 1 on crtc %u: diffr=%u " - "refcount %u, vblirq %u\n", pipe, diff, - atomic_read(&vblank->refcount), - (flags & DRM_CALLED_FROM_VBLIRQ) != 0); - diff = 1; - } - DRM_DEBUG_VBL("updating vblank count on crtc %u:" " current=%u, diff=%u, hw=%u hw_last=%u\n", pipe, vblank->count, diff, cur_vblank, vblank->last); @@ -417,6 +356,7 @@ int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs) init_waitqueue_head(&vblank->queue); setup_timer(&vblank->disable_timer, vblank_disable_fn, (unsigned long)vblank); + seqlock_init(&vblank->seqlock); } DRM_INFO("Supports vblank timestamp caching Rev 2 (21.10.2013).\n"); @@ -986,25 +926,19 @@ u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe, struct timeval *vblanktime) { struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; - int count = DRM_TIMESTAMP_MAXRETRIES; - u32 cur_vblank; + u32 vblank_count; + unsigned int seq; if (WARN_ON(pipe >= dev->num_crtcs)) return 0; - /* - * Vblank timestamps are read lockless. To ensure consistency the vblank - * counter is rechecked and ordering is ensured using memory barriers. - * This works like a seqlock. The write-side barriers are in store_vblank. - */ do { - cur_vblank = vblank->count; - smp_rmb(); - *vblanktime = vblanktimestamp(dev, pipe, cur_vblank); - smp_rmb(); - } while (cur_vblank != vblank->count && --count > 0); + seq = read_seqbegin(&vblank->seqlock); + vblank_count = vblank->count; + *vblanktime = vblank->time; + } while (read_seqretry(&vblank->seqlock, seq)); - return cur_vblank; + return vblank_count; } EXPORT_SYMBOL(drm_vblank_count_and_time); diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c index 04de6fd88f8c..cb39f45d6a16 100644 --- a/drivers/gpu/drm/drm_mm.c +++ b/drivers/gpu/drm/drm_mm.c @@ -179,12 +179,14 @@ static void drm_mm_insert_helper(struct drm_mm_node *hole_node, int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node) { struct drm_mm_node *hole; - u64 end = node->start + node->size; + u64 end; u64 hole_start; u64 hole_end; BUG_ON(node == NULL); + end = node->start + node->size; + /* Find the relevant hole to add our node to */ drm_mm_for_each_hole(hole, mm, hole_start, hole_end) { if (hole_start > node->start || hole_end < end) diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c index e3a4adf03e7b..f33ebe638a28 100644 --- a/drivers/gpu/drm/drm_modeset_lock.c +++ b/drivers/gpu/drm/drm_modeset_lock.c @@ -30,12 +30,12 @@ * * As KMS moves toward more fine grained locking, and atomic ioctl where * userspace can indirectly control locking order, it becomes necessary - * to use ww_mutex and acquire-contexts to avoid deadlocks. But because + * to use &ww_mutex and acquire-contexts to avoid deadlocks. But because * the locking is more distributed around the driver code, we want a bit * of extra utility/tracking out of our acquire-ctx. This is provided * by drm_modeset_lock / drm_modeset_acquire_ctx. * - * For basic principles of ww_mutex, see: Documentation/locking/ww-mutex-design.txt + * For basic principles of &ww_mutex, see: Documentation/locking/ww-mutex-design.txt * * The basic usage pattern is to: * @@ -51,6 +51,13 @@ * ... do stuff ... * drm_modeset_drop_locks(&ctx); * drm_modeset_acquire_fini(&ctx); + * + * On top of of these per-object locks using &ww_mutex there's also an overall + * dev->mode_config.lock, for protecting everything else. Mostly this means + * probe state of connectors, and preventing hotplug add/removal of connectors. + * + * Finally there's a bunch of dedicated locks to protect drm core internal + * lists and lookup data structures. */ /** diff --git a/drivers/gpu/drm/gma500/psb_intel_display.c b/drivers/gpu/drm/gma500/psb_intel_display.c index 398015be87e4..7b6c84925098 100644 --- a/drivers/gpu/drm/gma500/psb_intel_display.c +++ b/drivers/gpu/drm/gma500/psb_intel_display.c @@ -491,7 +491,6 @@ void psb_intel_crtc_init(struct drm_device *dev, int pipe, struct drm_psb_private *dev_priv = dev->dev_private; struct gma_crtc *gma_crtc; int i; - uint16_t *r_base, *g_base, *b_base; /* We allocate a extra array of drm_connector pointers * for fbdev after the crtc */ @@ -519,16 +518,10 @@ void psb_intel_crtc_init(struct drm_device *dev, int pipe, gma_crtc->pipe = pipe; gma_crtc->plane = pipe; - r_base = gma_crtc->base.gamma_store; - g_base = r_base + 256; - b_base = g_base + 256; for (i = 0; i < 256; i++) { gma_crtc->lut_r[i] = i; gma_crtc->lut_g[i] = i; gma_crtc->lut_b[i] = i; - r_base[i] = i << 8; - g_base[i] = i << 8; - b_base[i] = i << 8; gma_crtc->lut_adj[i] = 0; } diff --git a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c index 3f94785fbcca..193657259ee9 100644 --- a/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c +++ b/drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c @@ -173,7 +173,7 @@ static struct drm_driver kirin_drm_driver = { .fops = &kirin_drm_fops, .set_busid = drm_platform_set_busid, - .gem_free_object = drm_gem_cma_free_object, + .gem_free_object_unlocked = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .dumb_create = kirin_gem_cma_dumb_create, .dumb_map_offset = drm_gem_cma_dumb_map_offset, diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index f313b4d8344f..e264a90d1b0d 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -35,11 +35,9 @@ #include "i915_trace.h" #include "intel_drv.h" -#include <linux/apple-gmux.h> #include <linux/console.h> #include <linux/module.h> #include <linux/pm_runtime.h> -#include <linux/vgaarb.h> #include <linux/vga_switcheroo.h> #include <drm/drm_crtc_helper.h> @@ -1030,13 +1028,7 @@ static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) if (PCI_FUNC(pdev->devfn)) return -ENODEV; - /* - * apple-gmux is needed on dual GPU MacBook Pro - * to probe the panel if we're the inactive GPU. - */ - if (IS_ENABLED(CONFIG_VGA_ARB) && IS_ENABLED(CONFIG_VGA_SWITCHEROO) && - apple_gmux_present() && pdev != vga_default_device() && - !vga_switcheroo_handler_flags()) + if (vga_switcheroo_client_probe_defer(pdev)) return -EPROBE_DEFER; return drm_get_pci_dev(pdev, ent, &driver); diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c index b1223d54d0ab..06a417b2f91e 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c @@ -243,7 +243,7 @@ static struct drm_driver mtk_drm_driver = { .enable_vblank = mtk_drm_crtc_enable_vblank, .disable_vblank = mtk_drm_crtc_disable_vblank, - .gem_free_object = mtk_drm_gem_free_object, + .gem_free_object_unlocked = mtk_drm_gem_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .dumb_create = mtk_drm_gem_dumb_create, .dumb_map_offset = mtk_drm_gem_dumb_map_offset, diff --git a/drivers/gpu/drm/msm/msm_fbdev.c b/drivers/gpu/drm/msm/msm_fbdev.c index d9759bf3482e..1a061e3e8b9e 100644 --- a/drivers/gpu/drm/msm/msm_fbdev.c +++ b/drivers/gpu/drm/msm/msm_fbdev.c @@ -184,21 +184,7 @@ fail: return ret; } -static void msm_crtc_fb_gamma_set(struct drm_crtc *crtc, - u16 red, u16 green, u16 blue, int regno) -{ - DBG("fbdev: set gamma"); -} - -static void msm_crtc_fb_gamma_get(struct drm_crtc *crtc, - u16 *red, u16 *green, u16 *blue, int regno) -{ - DBG("fbdev: get gamma"); -} - static const struct drm_fb_helper_funcs msm_fb_helper_funcs = { - .gamma_set = msm_crtc_fb_gamma_set, - .gamma_get = msm_crtc_fb_gamma_get, .fb_probe = msm_fbdev_create, }; diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index 11f8dd9c0edb..5c4d4dff2da8 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -22,13 +22,11 @@ * Authors: Ben Skeggs */ -#include <linux/apple-gmux.h> #include <linux/console.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/pm_runtime.h> -#include <linux/vgaarb.h> #include <linux/vga_switcheroo.h> #include "drmP.h" @@ -315,13 +313,7 @@ static int nouveau_drm_probe(struct pci_dev *pdev, bool boot = false; int ret; - /* - * apple-gmux is needed on dual GPU MacBook Pro - * to probe the panel if we're the inactive GPU. - */ - if (IS_ENABLED(CONFIG_VGA_ARB) && IS_ENABLED(CONFIG_VGA_SWITCHEROO) && - apple_gmux_present() && pdev != vga_default_device() && - !vga_switcheroo_handler_flags()) + if (vga_switcheroo_client_probe_defer(pdev)) return -EPROBE_DEFER; /* remove conflicting drivers (vesafb, efifb etc) */ diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c index 8b5d54385892..5bc36c4d4232 100644 --- a/drivers/gpu/drm/qxl/qxl_display.c +++ b/drivers/gpu/drm/qxl/qxl_display.c @@ -730,7 +730,6 @@ static int qdev_crtc_init(struct drm_device *dev, int crtc_id) drm_crtc_init(dev, &qxl_crtc->base, &qxl_crtc_funcs); qxl_crtc->index = crtc_id; - drm_mode_crtc_set_gamma_size(&qxl_crtc->base, 256); drm_crtc_helper_add(&qxl_crtc->base, &qxl_crtc_helper_funcs); return 0; } diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c index b55aa740171f..a455dc7d4aa1 100644 --- a/drivers/gpu/drm/radeon/radeon_drv.c +++ b/drivers/gpu/drm/radeon/radeon_drv.c @@ -34,11 +34,9 @@ #include "radeon_drv.h" #include <drm/drm_pciids.h> -#include <linux/apple-gmux.h> #include <linux/console.h> #include <linux/module.h> #include <linux/pm_runtime.h> -#include <linux/vgaarb.h> #include <linux/vga_switcheroo.h> #include <drm/drm_gem.h> @@ -340,13 +338,7 @@ static int radeon_pci_probe(struct pci_dev *pdev, if (ret == -EPROBE_DEFER) return ret; - /* - * apple-gmux is needed on dual GPU MacBook Pro - * to probe the panel if we're the inactive GPU. - */ - if (IS_ENABLED(CONFIG_VGA_ARB) && IS_ENABLED(CONFIG_VGA_SWITCHEROO) && - apple_gmux_present() && pdev != vga_default_device() && - !vga_switcheroo_handler_flags()) + if (vga_switcheroo_client_probe_defer(pdev)) return -EPROBE_DEFER; /* Get rid of things like offb */ diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c index e5a9d3aaf45f..59adcf8532dd 100644 --- a/drivers/gpu/drm/vc4/vc4_bo.c +++ b/drivers/gpu/drm/vc4/vc4_bo.c @@ -291,8 +291,6 @@ static void vc4_bo_cache_free_old(struct drm_device *dev) /* Called on the last userspace/kernel unreference of the BO. Returns * it to the BO cache if possible, otherwise frees it. - * - * Note that this is called with the struct_mutex held. */ void vc4_free_object(struct drm_gem_object *gem_bo) { diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c index 3446ece21b4a..58b8fc036332 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.c +++ b/drivers/gpu/drm/vc4/vc4_drv.c @@ -99,7 +99,7 @@ static struct drm_driver vc4_drm_driver = { #endif .gem_create_object = vc4_create_object, - .gem_free_object = vc4_free_object, + .gem_free_object_unlocked = vc4_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, .prime_handle_to_fd = drm_gem_prime_handle_to_fd, diff --git a/drivers/gpu/drm/vc4/vc4_gem.c b/drivers/gpu/drm/vc4/vc4_gem.c index 46899d6de675..6155e8aca1c6 100644 --- a/drivers/gpu/drm/vc4/vc4_gem.c +++ b/drivers/gpu/drm/vc4/vc4_gem.c @@ -53,10 +53,8 @@ vc4_free_hang_state(struct drm_device *dev, struct vc4_hang_state *state) { unsigned int i; - mutex_lock(&dev->struct_mutex); for (i = 0; i < state->user_state.bo_count; i++) - drm_gem_object_unreference(state->bo[i]); - mutex_unlock(&dev->struct_mutex); + drm_gem_object_unreference_unlocked(state->bo[i]); kfree(state); } @@ -687,11 +685,9 @@ vc4_complete_exec(struct drm_device *dev, struct vc4_exec_info *exec) struct vc4_dev *vc4 = to_vc4_dev(dev); unsigned i; - /* Need the struct lock for drm_gem_object_unreference(). */ - mutex_lock(&dev->struct_mutex); if (exec->bo) { for (i = 0; i < exec->bo_count; i++) - drm_gem_object_unreference(&exec->bo[i]->base); + drm_gem_object_unreference_unlocked(&exec->bo[i]->base); kfree(exec->bo); } @@ -699,9 +695,8 @@ vc4_complete_exec(struct drm_device *dev, struct vc4_exec_info *exec) struct vc4_bo *bo = list_first_entry(&exec->unref_list, struct vc4_bo, unref_head); list_del(&bo->unref_head); - drm_gem_object_unreference(&bo->base.base); + drm_gem_object_unreference_unlocked(&bo->base.base); } - mutex_unlock(&dev->struct_mutex); mutex_lock(&vc4->power_lock); if (--vc4->power_refcount == 0) diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c index 341f9be3dde6..1b4cc8b27080 100644 --- a/drivers/gpu/drm/vgem/vgem_drv.c +++ b/drivers/gpu/drm/vgem/vgem_drv.c @@ -235,7 +235,7 @@ static const struct file_operations vgem_driver_fops = { static struct drm_driver vgem_driver = { .driver_features = DRIVER_GEM, - .gem_free_object = vgem_gem_free_object, + .gem_free_object_unlocked = vgem_gem_free_object, .gem_vm_ops = &vgem_gem_vm_ops, .ioctls = vgem_ioctls, .fops = &vgem_driver_fops, diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c index 70b44a2345ab..e50674bccb09 100644 --- a/drivers/gpu/drm/virtio/virtgpu_plane.c +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c @@ -63,11 +63,17 @@ static void virtio_gpu_plane_atomic_update(struct drm_plane *plane, { struct drm_device *dev = plane->dev; struct virtio_gpu_device *vgdev = dev->dev_private; - struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(plane->crtc); + struct virtio_gpu_output *output = NULL; struct virtio_gpu_framebuffer *vgfb; struct virtio_gpu_object *bo; uint32_t handle; + if (plane->state->crtc) + output = drm_crtc_to_virtio_gpu_output(plane->state->crtc); + if (old_state->crtc) + output = drm_crtc_to_virtio_gpu_output(old_state->crtc); + WARN_ON(!output); + if (plane->state->fb) { vgfb = to_virtio_gpu_framebuffer(plane->state->fb); bo = gem_to_virtio_gpu_obj(vgfb->obj); diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c index cbd7c986d926..2df216b39cc5 100644 --- a/drivers/gpu/vga/vga_switcheroo.c +++ b/drivers/gpu/vga/vga_switcheroo.c @@ -30,6 +30,7 @@ #define pr_fmt(fmt) "vga_switcheroo: " fmt +#include <linux/apple-gmux.h> #include <linux/console.h> #include <linux/debugfs.h> #include <linux/fb.h> @@ -308,7 +309,8 @@ static int register_client(struct pci_dev *pdev, * * Register vga client (GPU). Enable vga_switcheroo if another GPU and a * handler have already registered. The power state of the client is assumed - * to be ON. + * to be ON. Beforehand, vga_switcheroo_client_probe_defer() shall be called + * to ensure that all prerequisites are met. * * Return: 0 on success, -ENOMEM on memory allocation error. */ @@ -329,7 +331,8 @@ EXPORT_SYMBOL(vga_switcheroo_register_client); * @id: client identifier * * Register audio client (audio device on a GPU). The power state of the - * client is assumed to be ON. + * client is assumed to be ON. Beforehand, vga_switcheroo_client_probe_defer() + * shall be called to ensure that all prerequisites are met. * * Return: 0 on success, -ENOMEM on memory allocation error. */ @@ -376,6 +379,33 @@ find_active_client(struct list_head *head) } /** + * vga_switcheroo_client_probe_defer() - whether to defer probing a given client + * @pdev: client pci device + * + * Determine whether any prerequisites are not fulfilled to probe a given + * client. Drivers shall invoke this early on in their ->probe callback + * and return %-EPROBE_DEFER if it evaluates to %true. Thou shalt not + * register the client ere thou hast called this. + * + * Return: %true if probing should be deferred, otherwise %false. + */ +bool vga_switcheroo_client_probe_defer(struct pci_dev *pdev) +{ + if ((pdev->class >> 16) == PCI_BASE_CLASS_DISPLAY) { + /* + * apple-gmux is needed on pre-retina MacBook Pro + * to probe the panel if pdev is the inactive GPU. + */ + if (apple_gmux_present() && pdev != vga_default_device() && + !vgasr_priv.handler_flags) + return true; + } + + return false; +} +EXPORT_SYMBOL(vga_switcheroo_client_probe_defer); + +/** * vga_switcheroo_get_client_state() - obtain power state of a given client * @pdev: client pci device * diff --git a/include/drm/drmP.h b/include/drm/drmP.h index 84f1a8eefbdb..af8b71b2e5bd 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -52,6 +52,7 @@ #include <linux/poll.h> #include <linux/ratelimit.h> #include <linux/sched.h> +#include <linux/seqlock.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/vmalloc.h> @@ -392,11 +393,6 @@ struct drm_master { void *driver_priv; }; -/* Size of ringbuffer for vblank timestamps. Just double-buffer - * in initial implementation. - */ -#define DRM_VBLANKTIME_RBSIZE 2 - /* Flags and return codes for get_vblank_timestamp() driver function. */ #define DRM_CALLED_FROM_VBLIRQ 1 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0) @@ -725,10 +721,10 @@ struct drm_vblank_crtc { wait_queue_head_t queue; /**< VBLANK wait queue */ struct timer_list disable_timer; /* delayed disable timer */ - /* vblank counter, protected by dev->vblank_time_lock for writes */ - u32 count; - /* vblank timestamps, protected by dev->vblank_time_lock for writes */ - struct timeval time[DRM_VBLANKTIME_RBSIZE]; + seqlock_t seqlock; /* protects vblank count and time */ + + u32 count; /* vblank counter */ + struct timeval time; /* vblank timestamp */ atomic_t refcount; /* number of users of vblank interruptsper crtc */ u32 last; /* protected by dev->vbl_lock, used */ diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h index b39a5f3153bd..960bedbdec87 100644 --- a/include/linux/vga_switcheroo.h +++ b/include/linux/vga_switcheroo.h @@ -165,6 +165,7 @@ int vga_switcheroo_unlock_ddc(struct pci_dev *pdev); int vga_switcheroo_process_delayed_switch(void); +bool vga_switcheroo_client_probe_defer(struct pci_dev *pdev); enum vga_switcheroo_state vga_switcheroo_get_client_state(struct pci_dev *dev); void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic); @@ -188,6 +189,7 @@ static inline enum vga_switcheroo_handler_flags_t vga_switcheroo_handler_flags(v static inline int vga_switcheroo_lock_ddc(struct pci_dev *pdev) { return -ENODEV; } static inline int vga_switcheroo_unlock_ddc(struct pci_dev *pdev) { return -ENODEV; } static inline int vga_switcheroo_process_delayed_switch(void) { return 0; } +static inline bool vga_switcheroo_client_probe_defer(struct pci_dev *pdev) { return false; } static inline enum vga_switcheroo_state vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; } static inline void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic) {} |