linux_dsm_epyc7002/drivers/video
Tomi Valkeinen 3397cc6a71 OMAPDSS: DISPC: work-around for errata i631
Errata i631 description:

"When in YUV4:2:0 format in 1D burst, the DISPC DMA skips lines when
fetching Chroma sampling."

Workaround:

"If YUV4:2:0-1D burst is required: Set
DISPC_VIDp_ATTRIBUTES[22]DOUBLESTRIDE to 0x0 and
DISPC_VIDp_ATTRIBUTES[13:12]ROTATION to 0x1 or 0x3"

The description is somewhat confusing, but testing has shown that DSS
fetches extra rows from memory when using NV12 format in 1D mode. If the
memory after the framebuffer is inaccessible, this leads to OCP errors.

The driver always uses DOUBLESTRIDE=0 when using 1D mode, so we only
need to handle the ROTATION part.

The issue exist on all OMAP4 and OMAP5 based DSS IPs.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2015-06-17 15:38:43 +03:00
..
backlight backlight: pwm: Handle EPROBE_DEFER while requesting the PWM 2015-05-26 08:44:59 +01:00
console fbcon: Remove unused vblank cursor code 2015-01-26 14:10:37 +02:00
fbdev OMAPDSS: DISPC: work-around for errata i631 2015-06-17 15:38:43 +03:00
logo video/logo: prevent use of logos after they have been freed 2014-12-29 10:06:55 +02:00
display_timing.c video: add display_timing and videomode 2013-01-24 09:03:04 +01:00
hdmi.c [media] hdmi: rename HDMI_AUDIO_CODING_TYPE_EXT_STREAM to _EXT_CT 2015-01-27 10:19:12 -02:00
Kconfig gpu: ipu-v3: Move i.MX IPUv3 core driver out of staging 2014-06-04 11:06:52 +02:00
Makefile video: move fbdev to drivers/video/fbdev 2014-04-17 08:10:19 +03:00
of_display_timing.c fbdev changes for 3.18 2014-10-18 18:03:02 -07:00
of_videomode.c videomode: videomode_from_timing work 2013-03-21 14:34:33 +02:00
vgastate.c fbdev: vgastate: remove trailing whitespaces 2015-01-13 12:53:25 +02:00
videomode.c videomode: videomode_from_timing work 2013-03-21 14:34:33 +02:00