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mirror_ubuntu-kernels/drivers/gpu/drm/arc
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Eugeniy Paltsev 7bc61cc5df drm/arcpgu: Accommodate adv7511 switch to DRM bridge 
ARC PGU driver starts crashing on initialization after
'commit e12c2f6455 ("drm/i2c: adv7511: Convert to drm_bridge")'
This happenes because in "arcpgu_drm_hdmi_init" function we get pointer
of "drm_i2c_encoder_driver" structure, which doesn't exist after
adv7511 hdmi encoder interface changed from slave encoder to drm bridge.
So, when we call "encoder_init" function from this structure driver
crashes.

Bootlog:
------------------------------------->8--------------------------------
[drm] Initialized drm 1.1.0 20060810
arcpgu e0017000.pgu: arc_pgu ID: 0xabbabaab
arcpgu e0017000.pgu: assigned reserved memory node frame_buffer@9e000000
Path: (null)
CPU: 0 PID: 1 Comm: swapper Not tainted 4.8.0-00001-gb5642252fa01-dirty #8
task: 9a058000 task.stack: 9a032000

[ECR   ]: 0x00220100 => Invalid Read @ 0x00000004 by insn @ 0x803934e8
[EFA   ]: 0x00000004
[BLINK ]: drm_atomic_helper_connector_dpms+0xa6/0x230
[ERET  ]: drm_atomic_helper_connector_dpms+0xa4/0x230
[STAT32]: 0x00000846 : K DE       E2 E1
BTA: 0x8016d949  SP: 0x9a033e34  FP: 0x00000000
LPS: 0x8036f6fc LPE: 0x8036f700 LPC: 0x00000000
r00: 0x8063c118 r01: 0x805b98ac r02: 0x00000b11
r03: 0x00000000 r04: 0x9a010f54 r05: 0x00000000
r06: 0x00000001 r07: 0x00000000 r08: 0x00000028
r09: 0x00000001 r10: 0x00000007 r11: 0x00000054
r12: 0x720a3033

Stack Trace:
  drm_atomic_helper_connector_dpms+0xa4/0x230
  arcpgu_drm_hdmi_init+0xbc/0x228
  arcpgu_probe+0x168/0x244
  platform_drv_probe+0x26/0x64
  really_probe+0x1f0/0x32c
  __driver_attach+0xa8/0xd0
  bus_for_each_dev+0x3c/0x74
  bus_add_driver+0xc2/0x184
  driver_register+0x50/0xec
  do_one_initcall+0x3a/0x120
  kernel_init_freeable+0x108/0x1a0
------------------------------------->8--------------------------------

Fix ARC PGU driver to be able work with drm bridge hdmi encoder
interface. The hdmi connector code isn't needed anymore as we expect
the adv7511 bridge driver to create/manage the connector.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
2016-11-11 04:31:35 +03:00
..
arcpgu_crtc.c drm: Don't implement empty prepare_fb()/cleanup_fb() 2016-08-19 10:58:55 +02:00
arcpgu_drv.c drm: Don't swallow error codes in drm_dev_alloc() 2016-09-22 04:03:48 -07:00
arcpgu_hdmi.c drm/arcpgu: Accommodate adv7511 switch to DRM bridge 2016-11-11 04:31:35 +03:00
arcpgu_regs.h drm: Add support of ARC PGU display controller 2016-04-26 17:58:02 +03:00
arcpgu_sim.c drm/arcpgu: Make ARC PGU usable on simulation platforms 2016-06-13 17:45:17 +02:00
arcpgu.h Merge tag 'topic/drm-misc-2016-06-15' of git://anongit.freedesktop.org/drm-intel into drm-next 2016-06-16 05:49:32 +10:00
Kconfig drm/arc: make fbdev support really optional 2016-07-18 09:11:32 +02:00
Makefile drm/arcpgu: Make ARC PGU usable on simulation platforms 2016-06-13 17:45:17 +02:00