From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
To: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>, Eric Anholt <eric@anholt.net>,
Eben Upton <eben@raspberrypi.org>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Subject: [PATCH v2 1/2] drm/file: Rehabilitate the firstopen hook for non-legacy drivers
Date: Wed, 20 Mar 2019 16:48:08 +0100 [thread overview]
Message-ID: <20190320154809.14823-2-paul.kocialkowski@bootlin.com> (raw)
In-Reply-To: <20190320154809.14823-1-paul.kocialkowski@bootlin.com>
The firstopen DRM driver hook was initially used to perform hardware
initialization, which is now considered legacy. Only a single user of
firstopen remains at this point (savage).
In some specific cases, non-legacy drivers may also need to implement
these hooks. For instance on VC4, we need to allocate a 16 MiB buffer
for the GPU. Because it's not required for fbcon, it's a waste to
allocate it before userspace starts using the DRM device.
Using firstopen and lastclose for this allocation seems like the best
fit, so re-habilitate the hook to allow it to be called for non-legacy
drivers.
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
drivers/gpu/drm/drm_file.c | 3 +--
include/drm/drm_drv.h | 2 +-
2 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c
index b1838a41ad43..c011b5cbfb6b 100644
--- a/drivers/gpu/drm/drm_file.c
+++ b/drivers/gpu/drm/drm_file.c
@@ -266,8 +266,7 @@ static int drm_setup(struct drm_device * dev)
{
int ret;
- if (dev->driver->firstopen &&
- drm_core_check_feature(dev, DRIVER_LEGACY)) {
+ if (dev->driver->firstopen) {
ret = dev->driver->firstopen(dev);
if (ret != 0)
return ret;
diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
index ca46a45a9cce..aa14607e54d4 100644
--- a/include/drm/drm_drv.h
+++ b/include/drm/drm_drv.h
@@ -236,7 +236,7 @@ struct drm_driver {
* to set/unset the VT into raw mode.
*
* Legacy drivers initialize the hardware in the @firstopen callback,
- * which isn't even called for modern drivers.
+ * modern drivers can use it for other purposes only.
*/
void (*lastclose) (struct drm_device *);
--
2.21.0
next prev parent reply other threads:[~2019-03-20 15:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-20 15:48 [PATCH v2 0/2] drm/vc4: Binner BO management improvements Paul Kocialkowski
2019-03-20 15:48 ` Paul Kocialkowski [this message]
2019-03-20 16:56 ` [PATCH v2 1/2] drm/file: Rehabilitate the firstopen hook for non-legacy drivers Eric Anholt
2019-03-21 15:27 ` Paul Kocialkowski
2019-03-21 23:12 ` Eric Anholt
2019-03-28 18:53 ` Daniel Vetter
2019-03-29 9:09 ` Daniel Stone
2019-03-29 15:02 ` Paul Kocialkowski
2019-03-29 15:25 ` Daniel Vetter
2019-03-29 15:49 ` Paul Kocialkowski
2019-03-29 18:14 ` Eric Anholt
2019-03-29 18:42 ` Daniel Stone
2019-03-29 20:21 ` Paul Kocialkowski
2019-03-29 15:07 ` Paul Kocialkowski
2019-03-20 15:48 ` [PATCH v2 2/2] drm/vc4: Allocated/liberate the binner BO at firstopen/lastclose Paul Kocialkowski
2019-03-20 16:58 ` Eric Anholt
2019-03-21 15:58 ` Paul Kocialkowski
2019-03-21 16:20 ` Eric Anholt
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