From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- drivers/gpu/host1x/fence.c | 154 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 154 insertions(+) create mode 100644 drivers/gpu/host1x/fence.c (limited to 'drivers/gpu/host1x/fence.c') diff --git a/drivers/gpu/host1x/fence.c b/drivers/gpu/host1x/fence.c new file mode 100644 index 000000000..b9a7d0bf9 --- /dev/null +++ b/drivers/gpu/host1x/fence.c @@ -0,0 +1,154 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Syncpoint dma_fence implementation + * + * Copyright (c) 2020, NVIDIA Corporation. + */ + +#include +#include +#include +#include +#include + +#include "fence.h" +#include "intr.h" +#include "syncpt.h" + +static const char *host1x_syncpt_fence_get_driver_name(struct dma_fence *f) +{ + return "host1x"; +} + +static const char *host1x_syncpt_fence_get_timeline_name(struct dma_fence *f) +{ + return "syncpoint"; +} + +static struct host1x_syncpt_fence *to_host1x_fence(struct dma_fence *f) +{ + return container_of(f, struct host1x_syncpt_fence, base); +} + +static bool host1x_syncpt_fence_enable_signaling(struct dma_fence *f) +{ + struct host1x_syncpt_fence *sf = to_host1x_fence(f); + + if (host1x_syncpt_is_expired(sf->sp, sf->threshold)) + return false; + + /* Reference for interrupt path. */ + dma_fence_get(f); + + /* + * The dma_fence framework requires the fence driver to keep a + * reference to any fences for which 'enable_signaling' has been + * called (and that have not been signalled). + * + * We cannot currently always guarantee that all fences get signalled + * or cancelled. As such, for such situations, set up a timeout, so + * that long-lasting fences will get reaped eventually. + */ + if (sf->timeout) { + /* Reference for timeout path. */ + dma_fence_get(f); + schedule_delayed_work(&sf->timeout_work, msecs_to_jiffies(30000)); + } + + host1x_intr_add_fence_locked(sf->sp->host, sf); + + /* + * The fence may get signalled at any time after the above call, + * so we need to initialize all state used by signalling + * before it. + */ + + return true; +} + +static const struct dma_fence_ops host1x_syncpt_fence_ops = { + .get_driver_name = host1x_syncpt_fence_get_driver_name, + .get_timeline_name = host1x_syncpt_fence_get_timeline_name, + .enable_signaling = host1x_syncpt_fence_enable_signaling, +}; + +void host1x_fence_signal(struct host1x_syncpt_fence *f) +{ + if (atomic_xchg(&f->signaling, 1)) { + /* + * Already on timeout path, but we removed the fence before + * timeout path could, so drop interrupt path reference. + */ + dma_fence_put(&f->base); + return; + } + + if (f->timeout && cancel_delayed_work(&f->timeout_work)) { + /* + * We know that the timeout path will not be entered. + * Safe to drop the timeout path's reference now. + */ + dma_fence_put(&f->base); + } + + dma_fence_signal_locked(&f->base); + dma_fence_put(&f->base); +} + +static void do_fence_timeout(struct work_struct *work) +{ + struct delayed_work *dwork = (struct delayed_work *)work; + struct host1x_syncpt_fence *f = + container_of(dwork, struct host1x_syncpt_fence, timeout_work); + + if (atomic_xchg(&f->signaling, 1)) { + /* Already on interrupt path, drop timeout path reference if any. */ + if (f->timeout) + dma_fence_put(&f->base); + return; + } + + if (host1x_intr_remove_fence(f->sp->host, f)) { + /* + * Managed to remove fence from queue, so it's safe to drop + * the interrupt path's reference. + */ + dma_fence_put(&f->base); + } + + dma_fence_set_error(&f->base, -ETIMEDOUT); + dma_fence_signal(&f->base); + if (f->timeout) + dma_fence_put(&f->base); +} + +struct dma_fence *host1x_fence_create(struct host1x_syncpt *sp, u32 threshold, + bool timeout) +{ + struct host1x_syncpt_fence *fence; + + fence = kzalloc_obj(*fence); + if (!fence) + return ERR_PTR(-ENOMEM); + + fence->sp = sp; + fence->threshold = threshold; + fence->timeout = timeout; + + dma_fence_init(&fence->base, &host1x_syncpt_fence_ops, &sp->fences.lock, + dma_fence_context_alloc(1), 0); + + INIT_DELAYED_WORK(&fence->timeout_work, do_fence_timeout); + + return &fence->base; +} +EXPORT_SYMBOL(host1x_fence_create); + +void host1x_fence_cancel(struct dma_fence *f) +{ + struct host1x_syncpt_fence *sf = to_host1x_fence(f); + + schedule_delayed_work(&sf->timeout_work, 0); + flush_delayed_work(&sf->timeout_work); +} +EXPORT_SYMBOL(host1x_fence_cancel); -- cgit v1.3.1