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drm/bridge: synopsys: dw-hdmi: set scrambler bypassed when hdmi1.4

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Set resolution to 4K when connect an HDMI2.0 monitor
will enable scrambler feature.
At this time, change to connect an hdmi1.4 monitor will
cause black screen because we do not set scrambler feature bypassed.
So fix this.

Change-Id: Ic14b683719c8234c316dc1cacaa62c72a38e0294
Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
This commit is contained in:
Nickey Yang 2019-11-14 15:27:04 +08:00 committed by Tao Huang
parent ad96f1fe44
commit ad92b10c0e
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@ -2186,6 +2186,8 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
HDMI_MC_SWRSTZ);
drm_scdc_set_scrambling(&hdmi->i2c->adap, 0);
}
} else {
hdmi_writeb(hdmi, 0, HDMI_FC_SCRAMBLER_CTRL);
}
/* Set up horizontal active pixel width */