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2e7a66a8b5
linux/drivers/gpu/drm
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Linus Walleij 2e7a66a8b5 drm/bridge: sii902x: Retry status read after DDI I2C 
The following happens when connection a DVI output driven
from the SiI9022 using a DVI-to-VGA adapter plug:

i2c i2c-0: sendbytes: NAK bailout.
i2c i2c-0: sendbytes: NAK bailout.

Then no picture. Apparently the I2C engine inside the SiI9022
is not smart enough to try to fall back to DDC I2C. Or the
vendor have not integrated the electronics properly. I don't
know which one it is.

After this, the I2C bus seems stalled and the first attempt to
read the status register fails, and the code returns with
negative return value, and the display fails to initialized.

Instead, retry status readout five times and continue even
if this fails.

Tested on the ARM Versatile Express with a DVI-to-VGA
connector, it now gives picture.

Introduce a helper struct device *dev variable to make
the code more readable.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180305101702.13441-1-linus.walleij@linaro.org
2018-03-07 22:48:19 +01:00
..
amd drm-misc-next for 4.17: 2018-02-16 09:29:27 +10:00
arc drm/arcpgu: remove drm_encoder_slave 2018-01-30 18:05:25 +01:00
arm drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
armada drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
ast drm/ast: Load lut in crtc_commit 2018-02-01 11:35:46 +10:00
atmel-hlcdc drm/atmel-hlcdc: Use the alpha format field in drm_format_info 2018-01-29 12:08:37 +01:00
bochs drm/bochs: make structure bochs_bo_driver static 2018-02-19 10:43:44 +01:00
bridge drm/bridge: sii902x: Retry status read after DDI I2C 2018-03-07 22:48:19 +01:00
cirrus drm/ttm: use an operation ctx for ttm_tt_populate in ttm_bo_driver (v2) 2017-12-28 09:48:19 -05:00
etnaviv drm/etnaviv: use memset32 to init pagetable 2018-01-02 17:36:53 +01:00
exynos drm/bridge: analogix_dp: Don't create useless connectors 2018-03-07 16:18:00 +01:00
fsl-dcu
gma500 pci-v4.16-changes 2018-02-06 09:59:40 -08:00
hisilicon drm/ttm: use an operation ctx for ttm_tt_populate in ttm_bo_driver (v2) 2017-12-28 09:48:19 -05:00
i2c drm/i2c: tda998x: Remove duplicate NULL check 2018-01-18 16:24:38 +02:00
i810
i915 drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
imx drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
lib
mediatek drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
meson drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
mga
mgag200 drm/mgag200: fix a test in mga_vga_mode_valid() 2018-01-30 18:05:25 +01:00
msm drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
mxsfb drm/mxsfb: Do not use deprecated drm_driver.{enable|disable)_vblank 2018-02-22 17:58:59 +01:00
nouveau drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
omapdrm drm/omapdrm: Use of_find_backlight helper 2018-02-20 11:07:22 -05:00
panel drm/panel: Fix ARM Versatile panel clocks 2018-02-23 00:13:47 +01:00
pl111 drm/pl111: Handle the RealView variant separately 2018-03-07 22:48:08 +01:00
qxl drm/ttm: use an operation ctx for ttm_tt_populate in ttm_bo_driver (v2) 2017-12-28 09:48:19 -05:00
r128 r128: don't open-code memdup_user() 2017-12-27 19:00:09 -05:00
radeon drm-misc-next for 4.17: 2018-02-16 09:29:27 +10:00
rcar-du drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
rockchip drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
savage
scheduler
selftests
shmobile
sis
sti
stm drm/stm: check pitch and size calculations even if !CONFIG_MMU 2018-02-23 09:37:12 +01:00
sun4i drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
tdfx
tegra drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
tilcdc drm/tilcdc changes for 4.16 2017-12-21 11:10:20 +10:00
tinydrm tinydrm: add backlight dependency 2018-02-28 15:08:56 -05:00
ttm drm/ttm: Fix 'buf' pointer update in ttm_bo_vm_access_kmap() (v2) 2018-01-29 23:09:31 -05:00
tve200 drm/tve200: Do not use deprecated drm_driver.{enable|disable)_vblank 2018-02-22 17:58:59 +01:00
udl
vc4 drm/vc4: Replace long HDMI udelay with usleep_range 2018-03-05 10:19:21 -08:00
vgem
via
virtio drm/virtio: Add spaces around operators 2018-02-27 08:40:42 +01:00
vmwgfx drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
zte drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic_helper.c drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
drm_atomic.c drm/atomic: Include color encoding/range in plane state dump 2018-03-02 14:41:21 +02:00
drm_auth.c drm: Check for lessee in DROP_MASTER ioctl 2018-01-31 09:27:51 +01:00
drm_blend.c drm/docs: Align layout of optional plane blending properties 2018-02-20 12:10:46 +01:00
drm_bridge.c
drm_bufs.c
drm_cache.c
drm_color_mgmt.c drm/atomic: Include color encoding/range in plane state dump 2018-03-02 14:41:21 +02:00
drm_connector.c drm/docs: Document "scaling mode" property better 2018-02-20 12:10:46 +01:00
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c
drm_crtc_internal.h drm/atomic: Include color encoding/range in plane state dump 2018-03-02 14:41:21 +02:00
drm_crtc.c drm: Check that the plane supports the request format+modifier combo 2018-02-26 16:29:47 +02:00
drm_debugfs_crc.c drm/crc: Add support for polling on the data fd. 2018-02-05 13:22:44 +01:00
drm_debugfs.c
drm_dma.c
drm_dp_aux_dev.c
drm_dp_dual_mode_helper.c
drm_dp_helper.c drm/dp: Add HBR3 support in existing DRM DP helpers 2018-01-26 13:36:53 +02:00
drm_dp_mst_topology.c drm: NULL pointer dereference [null-pointer-deref] (CWE 476) problem 2018-02-19 12:58:20 +01:00
drm_drv.c drm: NULL pointer dereference [null-pointer-deref] (CWE 476) problem 2018-03-06 08:14:16 +01:00
drm_dumb_buffers.c
drm_edid_load.c
drm_edid.c drm: NULL pointer dereference [null-pointer-deref] (CWE 476) problem 2018-02-19 13:01:20 +01:00
drm_encoder_slave.c
drm_encoder.c drm: Warn if plane/crtc/encoder/connector index exceeds our 32bit bitmasks 2018-01-29 18:46:53 +02:00
drm_fb_cma_helper.c
drm_fb_helper.c drm/framebuffer: Print task that allocated the fb in debug info. 2017-12-20 15:30:17 +01:00
drm_file.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
drm_flip_work.c
drm_fourcc.c drm/fourcc: Add a alpha field to drm_format_info 2018-01-29 12:07:47 +01:00
drm_framebuffer.c drm/framebuffer: Print task that allocated the fb in debug info. 2017-12-20 15:30:17 +01:00
drm_gem_cma_helper.c
drm_gem_framebuffer_helper.c
drm_gem.c drm: Use idr_init_base(1) when using id==0 for invalid 2018-02-19 12:21:24 +00:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h
drm_ioc32.c
drm_ioctl.c drm: Print the pid when debug logging an ioctl error. 2018-02-10 22:23:10 +00:00
drm_irq.c
drm_kms_helper_common.c
drm_lease.c drm: Fix kerneldoc warnings for drm_lease 2018-02-19 10:49:59 +01:00
drm_legacy.h
drm_lock.c
drm_memory.c drm: fix drm_get_max_iomem type mismatch 2018-02-22 11:18:58 -05:00
drm_mipi_dsi.c drm/dsi: Fix improper use of mipi_dsi_device_transfer() return value 2018-01-16 17:10:14 -05:00
drm_mm.c drm/mm: Fix caching of leftmost node in the interval tree 2018-02-20 16:38:26 +00:00
drm_mode_config.c Linux 4.15-rc4 2017-12-19 21:37:24 +10:00
drm_mode_object.c
drm_modes.c drm/doc: Polish for drm_mode_parse_command_line_for_connector 2018-02-20 12:10:46 +01:00
drm_modeset_helper.c
drm_modeset_lock.c drm/atomic: Call ww_acquire_done after drm_modeset_lock_all 2018-03-05 10:35:32 +01:00
drm_of.c drm: of: simplify component probe code 2018-03-06 14:05:00 +05:30
drm_panel_orientation_quirks.c drm: Include the header with the prototype for drm_get_panel_orientation_quirk() 2018-02-26 17:39:59 +02:00
drm_panel.c
drm_pci.c
drm_plane_helper.c drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
drm_plane.c drm: Check that the plane supports the request format+modifier combo 2018-02-26 16:29:47 +02:00
drm_prime.c drm/prime: make the pages array optional for drm_prime_sg_to_page_addr_arrays 2018-03-06 12:24:52 -05:00
drm_print.c
drm_probe_helper.c drm/modes: Provide global mode_valid hook 2018-01-29 21:51:51 +02:00
drm_property.c drm: Reject bad property flag combinations 2018-03-07 18:28:34 +02:00
drm_rect.c
drm_scatter.c
drm_scdc_helper.c
drm_simple_kms_helper.c drm: Don't pass clip to drm_atomic_helper_check_plane_state() 2018-03-05 20:48:25 +02:00
drm_syncobj.c drm: Use idr_init_base(1) when using id==0 for invalid 2018-02-19 12:21:24 +00:00
drm_sysfs.c
drm_trace_points.c
drm_trace.h
drm_vblank.c drm: NULL pointer dereference [null-pointer-deref] (CWE 476) problem 2018-03-06 08:14:16 +01:00
drm_vm.c
drm_vma_manager.c
Kconfig Fixes for 4.16: 2018-01-25 11:42:25 +10:00
Makefile drm: fix gpu scheduler link order 2018-01-24 15:49:04 -05:00