On Wed, May 20, 2015 at 12:57 PM, Malte Schröder <malte@xxxxxxxx> wrote: > On 05/20/15 17:37, Alex Deucher wrote: >> On Tue, May 19, 2015 at 6:03 PM, Malte Schröder <malte@xxxxxxxx> wrote: >>> Hi, >>> with 4.1-rc display-port on my Tahiti XT stopped working. I used the >>> firmware from http://people.freedesktop.org/~agd5f/radeon_ucode/ as of >>> today. >>> Note: the display is an Asus PB278, it used to have problems with >>> display port negotiation, but those disappeared like a year ago. >>> >> >> Does booting with radeon.auxch=0 on the kernel command line in grub >> help? Can you bisect? >> >> Alex >> > > Yes, radeon.auxch=0 helps. As for bisecting, I can try, but I won't have > time for that until next week. No need to bisect. if auxch=0 helps, I know what commit broke it. Does the attached patch help? Alex > > -- > Gruß > Malte Schröder > --------------------------------------------------------------------- > MalteSch@xxxxxx >
From e3e5efb1e3f9d3f16a6521c56cde7a7b1c83a2e8 Mon Sep 17 00:00:00 2001 From: Alex Deucher <alexander.deucher@xxxxxxx> Date: Wed, 20 May 2015 17:58:49 -0400 Subject: [PATCH] drm/radeon: fix error flag checking in native aux path That atom table does not check these bits. Fixes aux regressions on some boards. Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: stable@xxxxxxxxxxxxxxx --- drivers/gpu/drm/radeon/radeon_dp_auxch.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_dp_auxch.c b/drivers/gpu/drm/radeon/radeon_dp_auxch.c index bf1fecc..fcbd60b 100644 --- a/drivers/gpu/drm/radeon/radeon_dp_auxch.c +++ b/drivers/gpu/drm/radeon/radeon_dp_auxch.c @@ -30,8 +30,6 @@ AUX_SW_RX_HPD_DISCON | \ AUX_SW_RX_PARTIAL_BYTE | \ AUX_SW_NON_AUX_MODE | \ - AUX_SW_RX_MIN_COUNT_VIOL | \ - AUX_SW_RX_INVALID_STOP | \ AUX_SW_RX_SYNC_INVALID_L | \ AUX_SW_RX_SYNC_INVALID_H | \ AUX_SW_RX_INVALID_START | \ -- 1.8.3.1
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