linux-kernel - [PATCH 1/3] drm/crtc: Introduce per-crtc kworker

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Message-Id: <20200919193727.2093945-2-robdclark@gmail.com>
Date:   Sat, 19 Sep 2020 12:37:24 -0700
From:   Rob Clark <robdclark@...il.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Peter Zijlstra <peterz@...radead.org>, Tejun Heo <tj@...nel.org>,
        timmurray@...gle.com, linux-arm-msm@...r.kernel.org,
        Rob Clark <robdclark@...omium.org>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 1/3] drm/crtc: Introduce per-crtc kworker

From: Rob Clark <robdclark@...omium.org>

This will be used for non-block atomic commits.

Signed-off-by: Rob Clark <robdclark@...omium.org>
---
 drivers/gpu/drm/drm_crtc.c | 11 +++++++++++
 include/drm/drm_crtc.h     |  8 ++++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index aecdd7ea26dc..4f7c0bfce0a3 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -326,6 +326,14 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
 					   config->prop_out_fence_ptr, 0);
 		drm_object_attach_property(&crtc->base,
 					   config->prop_vrr_enabled, 0);
+
+		crtc->worker = kthread_create_worker(0, "%s-worker", crtc->name);
+		if (IS_ERR(crtc->worker)) {
+			drm_mode_object_unregister(dev, &crtc->base);
+			ret = PTR_ERR(crtc->worker);
+			crtc->worker = NULL;
+			return ret;
+		}
 	}
 
 	return 0;
@@ -366,6 +374,9 @@ void drm_crtc_cleanup(struct drm_crtc *crtc)
 
 	kfree(crtc->name);
 
+	if (crtc->worker)
+		kthread_destroy_worker(crtc->worker);
+
 	memset(crtc, 0, sizeof(*crtc));
 }
 EXPORT_SYMBOL(drm_crtc_cleanup);
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 59b51a09cae6..8964a3732bca 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -30,6 +30,7 @@
 #include <linux/types.h>
 #include <linux/fb.h>
 #include <linux/hdmi.h>
+#include <linux/kthread.h>
 #include <linux/media-bus-format.h>
 #include <uapi/drm/drm_mode.h>
 #include <uapi/drm/drm_fourcc.h>
@@ -1172,6 +1173,13 @@ struct drm_crtc {
 	 * Initialized via drm_self_refresh_helper_init().
 	 */
 	struct drm_self_refresh_data *self_refresh_data;
+
+	/**
+	 * worker:
+	 *
+	 * Per-CRTC worker for nonblock atomic commits.
+	 */
+	struct kthread_worker *worker;
 };
 
 /**
-- 
2.26.2