Maxime Ripard e2771deb5d drm/sun4i: rgb: Change the pixel clock validation check ... The current code, since commit bb43d40d7c ("drm/sun4i: rgb: Validate the clock rate"), perform some validation on the pixel clock to filter out the EDID modes provided by monitors (through bridges) that we wouldn't be able to reach. For the usual modes, we're able to generate a perfect clock rate, so a strict check was enough. However, this had the side effect of preventing displays that would work otherwise to operate properly, since we would pretty much never be able to generate an exact rate for those displays, even though we would fall within that panel tolerance. This was also shown to happen for unusual modes exposed through EDIDs, for example on eDP panels. We can work around this by simplifying a bit the problem: no panels we've encountered so far actually needed that check. All of them are tied to a particular board when it is produced, and made to work with the Allwinner BSP. That pretty much guarantees that we never have a pixel clock out of reach. On the other hand, the EDIDs modes that needed to be validated have always been exposed through bridges. Let's just use that metric to instead of validating all modes, only validate modes when we have a bridge attached. It should be good enough for now, while we still have room for improvements or refinements using the display_timings structure for example for panels. We also add a tolerance for EDID-based modes instead of doing a strict check. This tolerance is of 0.5% which is the one advertised in the VESA DVT and CVT specs. If that needed to be extended in the future, we can add a custom module parameter to relax it a bit. Fixes: bb43d40d7c ("drm/sun4i: rgb: Validate the clock rate") Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Tested-by: Vasily Khoruzhick <anarsoul@gmail.com> # tested on pinebook Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/ec2dc2a7b3d4bd44f7a2a6e1c1813f92449a7310.1551191081.git-series.maxime.ripard@bootlin.com		2019-03-07 14:46:46 +01:00
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accessibility
acpi	Linux 5.0-rc7	2019-02-18 13:27:15 +10:00
amba
android
ata
atm
auxdisplay	auxdisplay: ht16k33: fix potential user-after-free on module unload	2019-02-15 19:48:39 +01:00
base	Merge drm/drm-next into drm-misc-next	2019-03-06 09:22:18 -05:00
bcma
block
bluetooth
bus
cdrom
char
clk	clk: at91: fix masterck name	2019-02-20 11:40:21 -08:00
clocksource
connector
cpufreq	cpufreq: scmi: Fix use-after-free in scmi_cpufreq_exit()	2019-02-19 11:17:37 +01:00
cpuidle
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2019-02-28 09:05:18 -08:00
dax
dca
devfreq
dio
dma
dma-buf	dma-buf: add some lockdep asserts to the reservation object implementation	2019-02-27 23:51:43 +01:00
edac
eisa
extcon
firewire
firmware	Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-02-17 09:22:01 -08:00
fmc
fpga
fsi
gnss
gpio	gpio: pxa: avoid attempting to set pin direction via pinctrl on MMP2	2019-02-14 10:06:03 +01:00
gpu	drm/sun4i: rgb: Change the pixel clock validation check	2019-03-07 14:46:46 +01:00
hid
hsi
hv
hwmon
hwspinlock
hwtracing
i2c	i2c: bcm2835: Clear current buffer pointers and counts after a transfer	2019-02-15 09:45:05 +01:00
i3c
ide
idle
iio
infiniband	iw_cxgb4: cq/qp mask depends on bar2 pages in a host page	2019-02-15 09:39:39 -07:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2019-02-17 08:30:35 -08:00
iommu	IOMMU Fix for Linux v5.0-rc8	2019-03-01 09:13:04 -08:00
ipack
irqchip
isdn
leds
lightnvm
macintosh
mailbox	mailbox: bcm-flexrm-mailbox: Fix FlexRM ring flush timeout issue	2019-02-18 10:40:58 -06:00
mcb
md	for-linus-20190215	2019-02-15 09:12:28 -08:00
media
memory
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mmc	mmc: sdhci-esdhc-imx: correct the fix of ERR004536	2019-02-28 12:18:31 +01:00
mtd
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net	net: dsa: mv88e6xxx: Fix statistics on mv88e6161	2019-03-02 00:45:04 -08:00
nfc
ntb
nubus
nvdimm
nvme
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of
opp
oprofile
parisc
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pci
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perf
phy	Linux 5.0-rc7	2019-02-18 13:27:15 +10:00
pinctrl	pinctrl: meson: meson8b: fix the sdxc_a data 1..3 pins	2019-02-17 22:24:32 +01:00
platform
pnp
power
powercap
pps
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rapidio
ras
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s390
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scsi	SCSI fixes on 20190302	2019-03-02 11:39:54 -08:00
sfi
sh
siox
slimbus
sn
soc
soundwire
spi
spmi
ssb
staging	Linux 5.0-rc7	2019-02-18 13:27:15 +10:00
target
tc
tee	tee: optee: add missing of_node_put after of_device_is_available	2019-02-28 10:23:04 +01:00
thermal
thunderbolt
tty
uio
usb
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vhost	vhost: correctly check the return value of translate_desc() in log_used()	2019-02-19 13:14:45 -08:00
video
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vme
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