| Message ID | 1305909372-22095-2-git-send-email-alexdeucher@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c index bbd6c59..48f5ff0 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;
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 <alexdeucher@gmail.com> --- drivers/gpu/drm/radeon/atombios_crtc.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)