Ville Syrjala
2018-Jun-26 17:47 UTC
[Nouveau] [PATCH 6/8] drm/nouveau: Use drm_for_each_connector_encoder_ids()
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
Use drm_for_each_connector_encoder_ids() for iterating
connector->encoder_ids[]. A bit more convenient not having
to deal with the implementation details.
Cc: Ben Skeggs <bskeggs at redhat.com>
Cc: nouveau at lists.freedesktop.org
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/nouveau/nouveau_connector.c | 20 +++++++-------------
1 file changed, 7 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c
b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 7b557c354307..ea12fbbea92e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -366,14 +366,11 @@ find_encoder(struct drm_connector *connector, int type)
struct drm_device *dev = connector->dev;
struct nouveau_encoder *nv_encoder;
struct drm_encoder *enc;
- int i, id;
+ u32 encoder_id;
+ int i;
- for (i = 0; i < DRM_CONNECTOR_MAX_ENCODER; i++) {
- id = connector->encoder_ids[i];
- if (!id)
- break;
-
- enc = drm_encoder_find(dev, NULL, id);
+ drm_for_each_connector_encoder_ids(connector, encoder_id, i) {
+ enc = drm_encoder_find(dev, NULL, encoder_id);
if (!enc)
continue;
nv_encoder = nouveau_encoder(enc);
@@ -423,6 +420,7 @@ nouveau_connector_ddc_detect(struct drm_connector
*connector)
struct nouveau_encoder *nv_encoder;
struct drm_encoder *encoder;
int i, panel = -ENODEV;
+ u32 encoder_id;
/* eDP panels need powering on by us (if the VBIOS doesn't default it
* to on) before doing any AUX channel transactions. LVDS panel power
@@ -436,12 +434,8 @@ nouveau_connector_ddc_detect(struct drm_connector
*connector)
}
}
- for (i = 0; nv_encoder = NULL, i < DRM_CONNECTOR_MAX_ENCODER; i++) {
- int id = connector->encoder_ids[i];
- if (id == 0)
- break;
-
- encoder = drm_encoder_find(dev, NULL, id);
+ drm_for_each_connector_encoder_ids(connector, encoder_id, i) {
+ encoder = drm_encoder_find(dev, NULL, encoder_id);
if (!encoder)
continue;
nv_encoder = nouveau_encoder(encoder);
--
2.16.4
kbuild test robot
2018-Jun-26 20:55 UTC
[Nouveau] [Intel-gfx] [PATCH 6/8] drm/nouveau: Use drm_for_each_connector_encoder_ids()
Hi Ville,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on drm/drm-next]
[also build test WARNING on v4.18-rc2 next-20180626]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]
url:
https://github.com/0day-ci/linux/commits/Ville-Syrjala/drm-Second-attempt-at-fixing-the-fb-helper-best_encoder-mess/20180627-024018
base: git://people.freedesktop.org/~airlied/linux.git drm-next
config: x86_64-randconfig-x012-201825 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-16) 7.3.0
reproduce:
# save the attached .config to linux build tree
make ARCH=x86_64
Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
All warnings (new ones prefixed by >>):
drivers/gpu//drm/nouveau/nouveau_connector.c: In function
'nouveau_connector_detect':>> drivers/gpu//drm/nouveau/nouveau_connector.c:606:33: warning:
'nv_encoder' may be used uninitialized in this function
[-Wmaybe-uninitialized]
if (nv_partner && ((nv_encoder->dcb->type ==
DCB_OUTPUT_ANALOG &&
~~~~~~~~~~^~~~~
vim +/nv_encoder +606 drivers/gpu//drm/nouveau/nouveau_connector.c
6ee73861 Ben Skeggs 2009-12-11 546
6ee73861 Ben Skeggs 2009-12-11 547 static enum drm_connector_status
930a9e28 Chris Wilson 2010-09-14 548 nouveau_connector_detect(struct
drm_connector *connector, bool force)
6ee73861 Ben Skeggs 2009-12-11 549 {
6ee73861 Ben Skeggs 2009-12-11 550 struct drm_device *dev =
connector->dev;
77145f1c Ben Skeggs 2012-07-31 551 struct nouveau_drm *drm =
nouveau_drm(dev);
6ee73861 Ben Skeggs 2009-12-11 552 struct nouveau_connector
*nv_connector = nouveau_connector(connector);
6ee73861 Ben Skeggs 2009-12-11 553 struct nouveau_encoder *nv_encoder
= NULL;
e19b20bb Ben Skeggs 2011-07-12 554 struct nouveau_encoder *nv_partner;
2aa5eac5 Ben Skeggs 2015-08-20 555 struct i2c_adapter *i2c;
03cd06ca Francisco Jerez 2010-07-20 556 int type;
5addcf0a Dave Airlie 2012-09-10 557 int ret;
5addcf0a Dave Airlie 2012-09-10 558 enum drm_connector_status
conn_status = connector_status_disconnected;
6ee73861 Ben Skeggs 2009-12-11 559
b8780e2a Francisco Jerez 2010-01-14 560 /* Cleanup the previous EDID block.
*/
b8780e2a Francisco Jerez 2010-01-14 561 if (nv_connector->edid) {
b8780e2a Francisco Jerez 2010-01-14 562
drm_mode_connector_update_edid_property(connector, NULL);
c8ebe275 Xavier Chantry 2010-01-11 563 kfree(nv_connector->edid);
c8ebe275 Xavier Chantry 2010-01-11 564 nv_connector->edid = NULL;
b8780e2a Francisco Jerez 2010-01-14 565 }
c8ebe275 Xavier Chantry 2010-01-11 566
d61a5c10 Lukas Wunner 2018-02-11 567 /* Outputs are only polled while
runtime active, so acquiring a
d61a5c10 Lukas Wunner 2018-02-11 568 * runtime PM ref here is
unnecessary (and would deadlock upon
d61a5c10 Lukas Wunner 2018-02-11 569 * runtime suspend because it waits
for polling to finish).
d61a5c10 Lukas Wunner 2018-02-11 570 */
d61a5c10 Lukas Wunner 2018-02-11 571 if
(!drm_kms_helper_is_poll_worker()) {
5addcf0a Dave Airlie 2012-09-10 572 ret =
pm_runtime_get_sync(connector->dev->dev);
b6c4285a Alexandre Courbot 2014-02-12 573 if (ret < 0 && ret !=
-EACCES)
5addcf0a Dave Airlie 2012-09-10 574 return conn_status;
d61a5c10 Lukas Wunner 2018-02-11 575 }
5addcf0a Dave Airlie 2012-09-10 576
8777c5c1 Ben Skeggs 2014-06-06 577 nv_encoder =
nouveau_connector_ddc_detect(connector);
8777c5c1 Ben Skeggs 2014-06-06 578 if (nv_encoder && (i2c =
nv_encoder->i2c) != NULL) {
39c1c901 Lukas Wunner 2016-01-11 579 if
((vga_switcheroo_handler_flags() &
39c1c901 Lukas Wunner 2016-01-11 580
VGA_SWITCHEROO_CAN_SWITCH_DDC) &&
39c1c901 Lukas Wunner 2016-01-11 581 nv_connector->type ==
DCB_CONNECTOR_LVDS)
39c1c901 Lukas Wunner 2016-01-11 582 nv_connector->edid =
drm_get_edid_switcheroo(connector,
39c1c901 Lukas Wunner 2016-01-11 583 i2c);
39c1c901 Lukas Wunner 2016-01-11 584 else
2aa5eac5 Ben Skeggs 2015-08-20 585 nv_connector->edid =
drm_get_edid(connector, i2c);
39c1c901 Lukas Wunner 2016-01-11 586
6ee73861 Ben Skeggs 2009-12-11 587
drm_mode_connector_update_edid_property(connector,
6ee73861 Ben Skeggs 2009-12-11 588 nv_connector->edid);
6ee73861 Ben Skeggs 2009-12-11 589 if (!nv_connector->edid) {
77145f1c Ben Skeggs 2012-07-31 590 NV_ERROR(drm, "DDC
responded, but no EDID for %s\n",
8c6c361a Jani Nikula 2014-06-03 591 connector->name);
0ed3165e Francisco Jerez 2010-01-14 592 goto detect_analog;
6ee73861 Ben Skeggs 2009-12-11 593 }
6ee73861 Ben Skeggs 2009-12-11 594
6ee73861 Ben Skeggs 2009-12-11 595 /* Override encoder type for DVI-I
based on whether EDID
6ee73861 Ben Skeggs 2009-12-11 596 * says the display is digital or
analog, both use the
6ee73861 Ben Skeggs 2009-12-11 597 * same i2c channel so the value
returned from ddc_detect
6ee73861 Ben Skeggs 2009-12-11 598 * isn't necessarily correct.
6ee73861 Ben Skeggs 2009-12-11 599 */
e19b20bb Ben Skeggs 2011-07-12 600 nv_partner = NULL;
cb75d97e Ben Skeggs 2012-07-11 601 if (nv_encoder->dcb->type ==
DCB_OUTPUT_TMDS)
cb75d97e Ben Skeggs 2012-07-11 602 nv_partner =
find_encoder(connector, DCB_OUTPUT_ANALOG);
cb75d97e Ben Skeggs 2012-07-11 603 if (nv_encoder->dcb->type ==
DCB_OUTPUT_ANALOG)
cb75d97e Ben Skeggs 2012-07-11 604 nv_partner =
find_encoder(connector, DCB_OUTPUT_TMDS);
cb75d97e Ben Skeggs 2012-07-11 605
cb75d97e Ben Skeggs 2012-07-11 @606 if (nv_partner &&
((nv_encoder->dcb->type == DCB_OUTPUT_ANALOG &&
cb75d97e Ben Skeggs 2012-07-11 607 nv_partner->dcb->type
== DCB_OUTPUT_TMDS) ||
cb75d97e Ben Skeggs 2012-07-11 608 (nv_encoder->dcb->type
== DCB_OUTPUT_TMDS &&
cb75d97e Ben Skeggs 2012-07-11 609 nv_partner->dcb->type
== DCB_OUTPUT_ANALOG))) {
6ee73861 Ben Skeggs 2009-12-11 610 if
(nv_connector->edid->input & DRM_EDID_INPUT_DIGITAL)
cb75d97e Ben Skeggs 2012-07-11 611 type = DCB_OUTPUT_TMDS;
6ee73861 Ben Skeggs 2009-12-11 612 else
cb75d97e Ben Skeggs 2012-07-11 613 type = DCB_OUTPUT_ANALOG;
6ee73861 Ben Skeggs 2009-12-11 614
e19b20bb Ben Skeggs 2011-07-12 615 nv_encoder =
find_encoder(connector, type);
6ee73861 Ben Skeggs 2009-12-11 616 }
6ee73861 Ben Skeggs 2009-12-11 617
6ee73861 Ben Skeggs 2009-12-11 618
nouveau_connector_set_encoder(connector, nv_encoder);
5addcf0a Dave Airlie 2012-09-10 619 conn_status =
connector_status_connected;
5addcf0a Dave Airlie 2012-09-10 620 goto out;
6ee73861 Ben Skeggs 2009-12-11 621 }
6ee73861 Ben Skeggs 2009-12-11 622
c16c5707 Francisco Jerez 2010-09-09 623 nv_encoder =
nouveau_connector_of_detect(connector);
c16c5707 Francisco Jerez 2010-09-09 624 if (nv_encoder) {
c16c5707 Francisco Jerez 2010-09-09 625
nouveau_connector_set_encoder(connector, nv_encoder);
5addcf0a Dave Airlie 2012-09-10 626 conn_status =
connector_status_connected;
5addcf0a Dave Airlie 2012-09-10 627 goto out;
c16c5707 Francisco Jerez 2010-09-09 628 }
c16c5707 Francisco Jerez 2010-09-09 629
0ed3165e Francisco Jerez 2010-01-14 630 detect_analog:
cb75d97e Ben Skeggs 2012-07-11 631 nv_encoder =
find_encoder(connector, DCB_OUTPUT_ANALOG);
f4053509 Ben Skeggs 2010-03-15 632 if (!nv_encoder &&
!nouveau_tv_disable)
cb75d97e Ben Skeggs 2012-07-11 633 nv_encoder =
find_encoder(connector, DCB_OUTPUT_TV);
84b8081c Francisco Jerez 2010-10-26 634 if (nv_encoder && force) {
6ee73861 Ben Skeggs 2009-12-11 635 struct drm_encoder *encoder =
to_drm_encoder(nv_encoder);
d58ded76 Jani Nikula 2015-03-11 636 const struct
drm_encoder_helper_funcs *helper 6ee73861 Ben Skeggs 2009-12-11 637
encoder->helper_private;
6ee73861 Ben Skeggs 2009-12-11 638
6ee73861 Ben Skeggs 2009-12-11 639 if (helper->detect(encoder,
connector) =6ee73861 Ben Skeggs 2009-12-11 640
connector_status_connected) {
6ee73861 Ben Skeggs 2009-12-11 641
nouveau_connector_set_encoder(connector, nv_encoder);
5addcf0a Dave Airlie 2012-09-10 642 conn_status =
connector_status_connected;
5addcf0a Dave Airlie 2012-09-10 643 goto out;
6ee73861 Ben Skeggs 2009-12-11 644 }
6ee73861 Ben Skeggs 2009-12-11 645
6ee73861 Ben Skeggs 2009-12-11 646 }
6ee73861 Ben Skeggs 2009-12-11 647
5addcf0a Dave Airlie 2012-09-10 648 out:
5addcf0a Dave Airlie 2012-09-10 649
d61a5c10 Lukas Wunner 2018-02-11 650 if
(!drm_kms_helper_is_poll_worker()) {
5addcf0a Dave Airlie 2012-09-10 651
pm_runtime_mark_last_busy(connector->dev->dev);
5addcf0a Dave Airlie 2012-09-10 652
pm_runtime_put_autosuspend(connector->dev->dev);
d61a5c10 Lukas Wunner 2018-02-11 653 }
5addcf0a Dave Airlie 2012-09-10 654
5addcf0a Dave Airlie 2012-09-10 655 return conn_status;
6ee73861 Ben Skeggs 2009-12-11 656 }
6ee73861 Ben Skeggs 2009-12-11 657
:::::: The code at line 606 was first introduced by commit
:::::: cb75d97e9c77743ecfcc43375be135a55a4d9b25 drm/nouveau: implement devinit
subdev, and new init table parser
:::::: TO: Ben Skeggs <bskeggs at redhat.com>
:::::: CC: Ben Skeggs <bskeggs at redhat.com>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
-------------- next part --------------
A non-text attachment was scrubbed...
Name: .config.gz
Type: application/gzip
Size: 27704 bytes
Desc: not available
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20180627/3ec58ef9/attachment-0001.gz>
Maybe Matching Threads
- [Bug 56461] New: NV11 black screen & kernel hang on loading nouveaufb
- [PATCH v2 5/9] drm/nouveau: Use drm_connector_for_each_possible_encoder()
- Panic in nouveau on resume after 5addcf0a
- [PATCH v2 5/9] drm/nouveau: Use drm_connector_for_each_possible_encoder()
- [PATCH 2/2] drm/connector: Allow max possible encoders to attach to a connector