From: Ben Skeggs Date: Fri, 4 Nov 2016 07:20:35 +0000 (+1000) Subject: drm/nouveau/disp/dp: remove workqueue for link training X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1f8711bafe0b43716592a3797f693eb7c0175123;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/nouveau/disp/dp: remove workqueue for link training There haven't been any callers from an atomic context for a while now, so let's remove the extra complexity. Signed-off-by: Ben Skeggs --- diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dport.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dport.c index 9688970eca47..4a93ceb850ac 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dport.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dport.c @@ -319,9 +319,8 @@ static const struct dp_rates { }; void -nvkm_dp_train(struct work_struct *w) +nvkm_dp_train(struct nvkm_output_dp *outp) { - struct nvkm_output_dp *outp = container_of(w, typeof(*outp), lt.work); struct nv50_disp *disp = nv50_disp(outp->base.disp); const struct dp_rates *cfg = nvkm_dp_rates; struct dp_state _dp = { @@ -353,9 +352,6 @@ nvkm_dp_train(struct work_struct *w) } cfg--; - /* disable link interrupt handling during link training */ - nvkm_notify_put(&outp->irq); - /* ensure sink is not in a low-power state */ if (!nvkm_rdaux(outp->aux, DPCD_SC00, &pwr, 1)) { if ((pwr & DPCD_SC00_SET_POWER) != DPCD_SC00_SET_POWER_D0) { @@ -400,9 +396,6 @@ nvkm_dp_train(struct work_struct *w) dp_link_train_fini(dp); - /* signal completion and enable link interrupt handling */ OUTP_DBG(&outp->base, "training complete"); atomic_set(&outp->lt.done, 1); - wake_up(&outp->lt.wait); - nvkm_notify_get(&outp->irq); } diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dport.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dport.h index 6e10c5e0ef11..baf1dd9ff975 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/dport.h +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/dport.h @@ -1,6 +1,6 @@ #ifndef __NVKM_DISP_DPORT_H__ #define __NVKM_DISP_DPORT_H__ -#include +struct nvkm_output_dp; /* DPCD Receiver Capabilities */ #define DPCD_RC00_DPCD_REV 0x00000 @@ -77,5 +77,5 @@ #define DPCD_SC00_SET_POWER_D0 0x01 #define DPCD_SC00_SET_POWER_D3 0x03 -void nvkm_dp_train(struct work_struct *); +void nvkm_dp_train(struct nvkm_output_dp *); #endif diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c index 29e84b241cca..0face69d6302 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/gf119.c @@ -314,7 +314,7 @@ gf119_disp_intr_unk2_2(struct nv50_disp *disp, int head) break; } - if (nvkm_output_dp_train(outp, pclk, true)) + if (nvkm_output_dp_train(outp, pclk)) OUTP_ERR(outp, "link not trained before attach"); } else { if (disp->func->sor.magic) diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c index fbb8c7dc18fd..a2bd0f06200f 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/nv50.c @@ -779,7 +779,7 @@ nv50_disp_intr_unk20_2(struct nv50_disp *disp, int head) break; } - if (nvkm_output_dp_train(outp, datarate / soff, true)) + if (nvkm_output_dp_train(outp, datarate / soff)) OUTP_ERR(outp, "link not trained before attach"); } diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c index 3b7a9e7a1ea8..de36f73b14dc 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.c @@ -31,7 +31,7 @@ #include int -nvkm_output_dp_train(struct nvkm_output *base, u32 datarate, bool wait) +nvkm_output_dp_train(struct nvkm_output *base, u32 datarate) { struct nvkm_output_dp *outp = nvkm_output_dp(base); bool retrain = true; @@ -39,6 +39,8 @@ nvkm_output_dp_train(struct nvkm_output *base, u32 datarate, bool wait) u32 linkrate; int ret, i; + mutex_lock(&outp->mutex); + /* check that the link is trained at a high enough rate */ ret = nvkm_rdaux(outp->aux, DPCD_LC00_LINK_BW_SET, link, 2); if (ret) { @@ -88,19 +90,10 @@ done: outp->dpcd[DPCD_RC02] = outp->base.info.dpconf.link_nr; } - atomic_set(&outp->lt.done, 0); - schedule_work(&outp->lt.work); - } else { - nvkm_notify_get(&outp->irq); - } - - if (wait) { - if (!wait_event_timeout(outp->lt.wait, - atomic_read(&outp->lt.done), - msecs_to_jiffies(2000))) - ret = -ETIMEDOUT; + nvkm_dp_train(outp); } + mutex_unlock(&outp->mutex); return ret; } @@ -118,7 +111,7 @@ nvkm_output_dp_enable(struct nvkm_output_dp *outp, bool enable) if (!nvkm_rdaux(aux, DPCD_RC00_DPCD_REV, outp->dpcd, sizeof(outp->dpcd))) { - nvkm_output_dp_train(&outp->base, 0, true); + nvkm_output_dp_train(&outp->base, 0); return; } } @@ -165,10 +158,10 @@ nvkm_output_dp_irq(struct nvkm_notify *notify) }; OUTP_DBG(&outp->base, "IRQ: %d", line->mask); - nvkm_output_dp_train(&outp->base, 0, true); + nvkm_output_dp_train(&outp->base, 0); nvkm_event_send(&disp->hpd, rep.mask, conn->index, &rep, sizeof(rep)); - return NVKM_NOTIFY_DROP; + return NVKM_NOTIFY_KEEP; } static void @@ -177,7 +170,6 @@ nvkm_output_dp_fini(struct nvkm_output *base) struct nvkm_output_dp *outp = nvkm_output_dp(base); nvkm_notify_put(&outp->hpd); nvkm_notify_put(&outp->irq); - flush_work(&outp->lt.work); nvkm_output_dp_enable(outp, false); } @@ -187,6 +179,7 @@ nvkm_output_dp_init(struct nvkm_output *base) struct nvkm_output_dp *outp = nvkm_output_dp(base); nvkm_notify_put(&outp->base.conn->hpd); nvkm_output_dp_enable(outp, true); + nvkm_notify_get(&outp->irq); nvkm_notify_get(&outp->hpd); } @@ -238,11 +231,6 @@ nvkm_output_dp_ctor(const struct nvkm_output_dp_func *func, OUTP_DBG(&outp->base, "bios dp %02x %02x %02x %02x", outp->version, hdr, cnt, len); - /* link training */ - INIT_WORK(&outp->lt.work, nvkm_dp_train); - init_waitqueue_head(&outp->lt.wait); - atomic_set(&outp->lt.done, 0); - /* link maintenance */ ret = nvkm_notify_init(NULL, &i2c->event, nvkm_output_dp_irq, true, &(struct nvkm_i2c_ntfy_req) { @@ -257,6 +245,9 @@ nvkm_output_dp_ctor(const struct nvkm_output_dp_func *func, return ret; } + mutex_init(&outp->mutex); + atomic_set(&outp->lt.done, 0); + /* hotplug detect, replaces gpio-based mechanism with aux events */ ret = nvkm_notify_init(NULL, &i2c->event, nvkm_output_dp_hpd, true, &(struct nvkm_i2c_ntfy_req) { diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.h b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.h index 4e983f6d7032..7b63d9737951 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.h +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/outpdp.h @@ -29,9 +29,8 @@ struct nvkm_output_dp { bool present; u8 dpcd[16]; + struct mutex mutex; struct { - struct work_struct work; - wait_queue_head_t wait; atomic_t done; } lt; }; @@ -43,7 +42,7 @@ struct nvkm_output_dp_func { int (*drv_ctl)(struct nvkm_output_dp *, int ln, int vs, int pe, int pc); }; -int nvkm_output_dp_train(struct nvkm_output *, u32 rate, bool wait); +int nvkm_output_dp_train(struct nvkm_output *, u32 rate); int nvkm_output_dp_ctor(const struct nvkm_output_dp_func *, struct nvkm_disp *, int index, struct dcb_output *, struct nvkm_i2c_aux *, diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c index 6424b396dcde..e9548e4fbf21 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/rootnv50.c @@ -173,7 +173,7 @@ nv50_disp_root_mthd_(struct nvkm_object *object, u32 mthd, void *data, u32 size) return 0; } else if (args->v0.state != 0) { - nvkm_output_dp_train(&outpdp->base, 0, true); + nvkm_output_dp_train(&outpdp->base, 0); return 0; } } else