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Message-Id: <20250503-msm-gpu-split-v2-1-1292cba0f5ad@oss.qualcomm.com>
Date: Sat, 03 May 2025 10:17:00 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Rob Clark <robdclark@...il.com>, Abhinav Kumar <quic_abhinavk@...cinc.com>,
Dmitry Baryshkov <lumag@...nel.org>, Sean Paul <sean@...rly.run>,
Marijn Suijten <marijn.suijten@...ainline.org>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 01/11] drm/msm: move wq handling to KMS code
The global workqueue is only used for vblanks inside KMS code. Move
allocation / flushing / deallcation of it to msm_kms.c
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 2 +-
drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c | 2 +-
drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c | 2 +-
drivers/gpu/drm/msm/msm_drv.c | 21 ++-------------------
drivers/gpu/drm/msm/msm_drv.h | 2 --
drivers/gpu/drm/msm/msm_kms.c | 11 +++++++++--
drivers/gpu/drm/msm/msm_kms.h | 8 ++++++++
7 files changed, 22 insertions(+), 26 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index f9c46180b8f7ace9122e74015244334c1f13ef2b..1aaed1cd9ec58fed3230acda4c283f0eedf3a9f0 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -980,7 +980,7 @@ static int dpu_encoder_resource_control(struct drm_encoder *drm_enc,
return 0;
}
- queue_delayed_work(priv->wq, &dpu_enc->delayed_off_work,
+ queue_delayed_work(priv->kms->wq, &dpu_enc->delayed_off_work,
msecs_to_jiffies(dpu_enc->idle_timeout));
trace_dpu_enc_rc(DRMID(drm_enc), sw_event,
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
index b8610aa806eaeb540e76a6a17283faea6f482a99..5e1e62256c382426f70d21a5312fb40dda68d695 100644
--- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
+++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_crtc.c
@@ -511,7 +511,7 @@ static void mdp4_crtc_vblank_irq(struct mdp_irq *irq, uint32_t irqstatus)
if (pending & PENDING_CURSOR) {
update_cursor(crtc);
- drm_flip_work_commit(&mdp4_crtc->unref_cursor_work, priv->wq);
+ drm_flip_work_commit(&mdp4_crtc->unref_cursor_work, priv->kms->wq);
}
}
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
index 0f653e62b4a008e3bafe09ee7fb4399e1fccb722..fce2365753e22850e56521e82b9d9dca29c09280 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
@@ -1196,7 +1196,7 @@ static void mdp5_crtc_vblank_irq(struct mdp_irq *irq, uint32_t irqstatus)
}
if (pending & PENDING_CURSOR)
- drm_flip_work_commit(&mdp5_crtc->unref_cursor_work, priv->wq);
+ drm_flip_work_commit(&mdp5_crtc->unref_cursor_work, priv->kms->wq);
}
static void mdp5_crtc_err_irq(struct mdp_irq *irq, uint32_t irqstatus)
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index f316e6776f672e7a97268f716040d0cf73256c4b..78cea9d4999488648b4131a2da425fb349d1b664 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -82,13 +82,6 @@ static int msm_drm_uninit(struct device *dev)
drm_atomic_helper_shutdown(ddev);
}
- /* We must cancel and cleanup any pending vblank enable/disable
- * work before msm_irq_uninstall() to avoid work re-enabling an
- * irq after uninstall has disabled it.
- */
-
- flush_workqueue(priv->wq);
-
msm_gem_shrinker_cleanup(ddev);
msm_perf_debugfs_cleanup(priv);
@@ -104,8 +97,6 @@ static int msm_drm_uninit(struct device *dev)
ddev->dev_private = NULL;
drm_dev_put(ddev);
- destroy_workqueue(priv->wq);
-
return 0;
}
@@ -227,12 +218,6 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
ddev->dev_private = priv;
priv->dev = ddev;
- priv->wq = alloc_ordered_workqueue("msm", 0);
- if (!priv->wq) {
- ret = -ENOMEM;
- goto err_put_dev;
- }
-
INIT_LIST_HEAD(&priv->objects);
mutex_init(&priv->obj_lock);
@@ -253,12 +238,12 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
if (priv->kms_init) {
ret = drmm_mode_config_init(ddev);
if (ret)
- goto err_destroy_wq;
+ goto err_put_dev;
}
ret = msm_init_vram(ddev);
if (ret)
- goto err_destroy_wq;
+ goto err_put_dev;
dma_set_max_seg_size(dev, UINT_MAX);
@@ -304,8 +289,6 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
err_deinit_vram:
msm_deinit_vram(ddev);
-err_destroy_wq:
- destroy_workqueue(priv->wq);
err_put_dev:
drm_dev_put(ddev);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index a65077855201746c37ee742364b61116565f3794..cc603bd4729e909e9381a3c277db262b13361de6 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -177,8 +177,6 @@ struct msm_drm_private {
struct mutex lock;
} lru;
- struct workqueue_struct *wq;
-
unsigned int num_crtcs;
struct msm_drm_thread event_thread[MAX_CRTCS];
diff --git a/drivers/gpu/drm/msm/msm_kms.c b/drivers/gpu/drm/msm/msm_kms.c
index 35d5397e73b4c5cb90b1770e8570277e782be7ec..184a4503fef0deff7234a3ce332e0bf564fbce46 100644
--- a/drivers/gpu/drm/msm/msm_kms.c
+++ b/drivers/gpu/drm/msm/msm_kms.c
@@ -137,7 +137,7 @@ static int vblank_ctrl_queue_work(struct msm_drm_private *priv,
vbl_work->enable = enable;
vbl_work->priv = priv;
- queue_work(priv->wq, &vbl_work->work);
+ queue_work(priv->kms->wq, &vbl_work->work);
return 0;
}
@@ -227,6 +227,13 @@ void msm_drm_kms_uninit(struct device *dev)
BUG_ON(!kms);
+ /* We must cancel and cleanup any pending vblank enable/disable
+ * work before msm_irq_uninstall() to avoid work re-enabling an
+ * irq after uninstall has disabled it.
+ */
+
+ flush_workqueue(kms->wq);
+
/* clean up event worker threads */
for (i = 0; i < priv->num_crtcs; i++) {
if (priv->event_thread[i].worker)
@@ -261,7 +268,7 @@ int msm_drm_kms_init(struct device *dev, const struct drm_driver *drv)
ret = priv->kms_init(ddev);
if (ret) {
DRM_DEV_ERROR(dev, "failed to load kms\n");
- return ret;
+ goto err_msm_uninit;
}
/* Enable normalization of plane zpos */
diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h
index 43b58d052ee6aae0ce34d09c88e1e1c34f9c52ef..e52649bbee7dc6a80abfecf7f8d5bcfad3d8f60b 100644
--- a/drivers/gpu/drm/msm/msm_kms.h
+++ b/drivers/gpu/drm/msm/msm_kms.h
@@ -153,6 +153,8 @@ struct msm_kms {
struct mutex commit_lock[MAX_CRTCS];
unsigned pending_crtc_mask;
struct msm_pending_timer pending_timers[MAX_CRTCS];
+
+ struct workqueue_struct *wq;
};
static inline int msm_kms_init(struct msm_kms *kms,
@@ -165,6 +167,10 @@ static inline int msm_kms_init(struct msm_kms *kms,
kms->funcs = funcs;
+ kms->wq = alloc_ordered_workqueue("msm", 0);
+ if (!kms->wq)
+ return -ENOMEM;
+
for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++) {
ret = msm_atomic_init_pending_timer(&kms->pending_timers[i], kms, i);
if (ret) {
@@ -181,6 +187,8 @@ static inline void msm_kms_destroy(struct msm_kms *kms)
for (i = 0; i < ARRAY_SIZE(kms->pending_timers); i++)
msm_atomic_destroy_pending_timer(&kms->pending_timers[i]);
+
+ destroy_workqueue(kms->wq);
}
#define for_each_crtc_mask(dev, crtc, crtc_mask) \
--
2.39.5
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