Revision ab170c27361d1578b4769276ce2bbdb14394743d authored by Ondrej Jirman on 21 April 2018, 04:51:55 UTC, committed by Sean Paul on 25 April 2018, 19:03:12 UTC
The reverted commit broke LVDS output on TBS A711 Tablet. That tablet has simple-panel node that has fixed pixel clock-frequency that A83T SoC used in the tablet can't generate exactly. Requested rate is 52000000 and rounded_rate is calculated as 51857142. It's close enough for it to work in practice, but with strict check in the reverted commit, the mode is rejected needlessly in this case. DT allows to specify a range of values for simple-panel/clock-frequency, but driver doesn't respect that ATM. Given that TBS A711 is the single user of sun4i-lvds driver, let's revert that commit for now, until a better solution for the problem is found. Also see: https://patchwork.kernel.org/patch/9446385/ for relevant discussion (or search for "[RFC] drm/sun4i: rgb: Add 5% tolerance to dot clock frequency check"). Fixes: e4e4b7ad50cf ("drm/sun4i: add lvds mode_valid function") Reported-by: Ondrej Jirman <megous@megous.com> Signed-off-by: Ondrej Jirman <megous@megous.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180421045155.15332-1-megous@megous.com Signed-off-by: Sean Paul <seanpaul@chromium.org>
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File | Mode | Size |
---|---|---|
Kconfig | -rw-r--r-- | 938 bytes |
Makefile | -rw-r--r-- | 174 bytes |
autofs_i.h | -rw-r--r-- | 7.6 KB |
dev-ioctl.c | -rw-r--r-- | 17.9 KB |
expire.c | -rw-r--r-- | 14.5 KB |
init.c | -rw-r--r-- | 1.1 KB |
inode.c | -rw-r--r-- | 8.5 KB |
root.c | -rw-r--r-- | 24.0 KB |
symlink.c | -rw-r--r-- | 798 bytes |
waitq.c | -rw-r--r-- | 13.5 KB |
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