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drm/rockchip: dw-dp: support force output

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When config dp show log as force output mode, it will not get
edid and detect the connect status(to avoid aux error because
sink may be not physical connected). So it should set default
color format and link info before show kernel logo, which will
be used when select the output color format.

Signed-off-by: Zhang Yubing <yubing.zhang@rock-chips.com>
Change-Id: I76ec29cebb101b8629e81eee3d82c93f53cc9102
This commit is contained in:
Zhang Yubing
2022-03-28 10:55:03 +08:00
committed by Tao Huang
parent ea3141aacf
commit 9ea31d1d20
1 changed files with 43 additions and 2 deletions
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45
drivers/gpu/drm/rockchip/dw-dp.c
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@@ -1932,11 +1932,52 @@ static int dw_dp_bridge_mode_valid(struct drm_bridge *bridge,
static void dw_dp_loader_protect(struct drm_encoder *encoder, bool on)
{
struct dw_dp *dp = encoder_to_dp(encoder);
struct dw_dp_link *link = &dp->link;
struct drm_connector *conn = &dp->connector;
struct drm_display_info *di = &conn->display_info;
u32 value;
if (on) {
di->color_formats = DRM_COLOR_FORMAT_RGB444;
di->bpc = 8;
regmap_read(dp->regmap, DPTX_PHYIF_CTRL, &value);
switch (FIELD_GET(PHY_LANES, value)) {
case 2:
link->lanes = 4;
break;
case 1:
link->lanes = 2;
break;
case 0:
fallthrough;
default:
link->lanes = 1;
break;
}
switch (FIELD_GET(PHY_RATE, value)) {
case 3:
link->rate = 810000;
break;
case 2:
link->rate = 540000;
break;
case 1:
link->rate = 270000;
break;
case 0:
fallthrough;
default:
link->rate = 162000;
break;
}
if (on)
phy_power_on(dp->phy);
else
} else {
phy_power_off(dp->phy);
}
}
static int dw_dp_bridge_attach(struct drm_bridge *bridge,