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drm/rockchip: dw_hdmi: Fix hdmi2.0 mode no signal when plug out before hdmi bind

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When the hdmi is plugged in and out after uboot but
before kernel initialization, the TV will enter hdmi 1.4 mode,
hdmi 2.0 resolution can't be display.
In this case, we need to disable/enable hdmi again to make TV
into hdmi 2.0 mode again.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Change-Id: I39fbe519d54329ae7db57904013bfdef6f5a068e
This commit is contained in:
Algea Cao
2023-04-24 15:08:53 +08:00
committed by Tao Huang
parent 35d3b7a0e8
commit 5e54a1092f
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
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@@ -3263,6 +3263,8 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
* drm_display_mode and set phy status to enabled.
*/
if (!vmode->mpixelclock) {
u8 val;
hdmi->curr_conn = connector;
if (hdmi->plat_data->get_enc_in_encoding)
@@ -3288,6 +3290,11 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
vmode->mtmdsclock /= 2;
dw_hdmi_force_output_pattern(hdmi, mode);
drm_scdc_readb(hdmi->ddc, SCDC_TMDS_CONFIG, &val);
/* if plug out before hdmi bind, reset hdmi */
if (vmode->mtmdsclock >= 340000000 && !(val & SCDC_TMDS_BIT_CLOCK_RATIO_BY_40))
hdmi->logo_plug_out = true;
}
if (check_hdr_color_change(old_state, new_state, hdmi) || hdmi->logo_plug_out ||