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drm/panel: st7701: Add prepare_prev_first flag to drm_panel

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The DSI host must be enabled for the panel to be initialized in
prepare(). Set the prepare_prev_first flag to guarantee this.
This fixes the panel operation on NXP i.MX8MP SoC / Samsung DSIM
DSI host.

Fixes: 849b2e3ff969 ("drm/panel: Add Sitronix ST7701 panel driver")
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Link: https://lore.kernel.org/r/20241124224812.150263-1-marex@denx.de
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241124224812.150263-1-marex@denx.de
This commit is contained in:
Marek Vasut 2024-11-24 23:48:07 +01:00 committed by Neil Armstrong
parent f8fd0968ef
commit 406dd4c798
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/panel/panel-sitronix-st7701.c
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@ -1177,6 +1177,7 @@ static int st7701_probe(struct device *dev, int connector_type)
return dev_err_probe(dev, ret, "Failed to get orientation\n");
drm_panel_init(&st7701->panel, dev, &st7701_funcs, connector_type);
st7701->panel.prepare_prev_first = true;
/**
* Once sleep out has been issued, ST7701 IC required to wait 120ms