From 6f15c506e0cec601fad9fabb7ded0d1811b8002f Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Fri, 20 May 2011 12:36:12 -0400 Subject: [PATCH] drm/radeon/kms: properly set the CLK_REF bit for DCE3 devices If the ss clock is external, the CLK_REF bit needs to be set in the SetPixelClock parameters. This should fix DP failures in the channel equalization loop. Signed-off-by: Alex Deucher Signed-off-by: Dave Airlie --- drivers/gpu/drm/radeon/atombios_crtc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index dab06fb17cb2..f5819ba481d9 100644 --- a/drivers/gpu/drm/radeon/atombios_crtc.c +++ b/drivers/gpu/drm/radeon/atombios_crtc.c @@ -815,6 +815,8 @@ static void atombios_crtc_program_pll(struct drm_crtc *crtc, args.v3.ucPostDiv = post_div; args.v3.ucPpll = pll_id; args.v3.ucMiscInfo = (pll_id << 2); + if (ss_enabled && (ss->type & ATOM_EXTERNAL_SS_MASK)) + args.v3.ucMiscInfo |= PIXEL_CLOCK_MISC_REF_DIV_SRC; args.v3.ucTransmitterId = encoder_id; args.v3.ucEncoderMode = encoder_mode; break;