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drm/bridge: synopsys: dw-hdmi-qp: Don't read scdc regs with hdmi1.4 sink

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Only hdmi2.0 and later versions support scdc.

Change-Id: Ice2079afe38e624ef7a0dbb2a67f6c8c5d5ba58d
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
This commit is contained in:
Algea Cao
2024-09-30 14:38:14 +08:00
committed by Tao Huang
parent 35551a6540
commit 4aa5b7a0fa
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
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@@ -3179,7 +3179,9 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
extcon_set_state_sync(hdmi->extcon, EXTCON_DISP_HDMI, true);
}
drm_scdc_readb(hdmi->ddc, SCDC_TMDS_CONFIG, &val);
val = 0;
if (dw_hdmi_support_scdc(hdmi, &connector->display_info))
drm_scdc_readb(hdmi->ddc, SCDC_TMDS_CONFIG, &val);
/* if plug out before hdmi bind, reset hdmi */
if (vmode->mtmdsclock >= 340000000 && vmode->mpixelclock <= 600000000 &&
!(val & SCDC_TMDS_BIT_CLOCK_RATIO_BY_40) && !hdmi->force_kernel_output)