linux_dsm_epyc7002/drivers/gpu
Ville Syrjälä c978ae9bde drm/dp/mst: Configure no_stop_bit correctly for remote i2c xfers
We aren't supposed to force a stop+start between every i2c msg
when performing multi message transfers. This should eg. cause
the DDC segment address to be reset back to 0 between writing
the segment address and reading the actual EDID extension block.

To quote the E-DDC spec:
"... this standard requires that the segment pointer be
 reset to 00h when a NO ACK or a STOP condition is received."

Since we're going to touch this might as well consult the
I2C_M_STOP flag to determine whether we want to force the stop
or not.

Cc: Brian Vincent <brainn@gmail.com>
References: https://bugs.freedesktop.org/show_bug.cgi?id=108081
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180928180403.22499-1-ville.syrjala@linux.intel.com
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
2018-12-10 22:33:20 +02:00
..
drm drm/dp/mst: Configure no_stop_bit correctly for remote i2c xfers 2018-12-10 22:33:20 +02:00
host1x gpu: host1x: Detach Host1x from IOMMU DMA domain on arm32 2018-09-26 17:11:14 +02:00
ipu-v3 media: v4l: mediabus: Recognise CSI-2 D-PHY and C-PHY 2018-10-04 16:06:15 -04:00
vga drm-misc-next for v4.21, part 1: 2018-11-19 10:40:33 +10:00
Makefile