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video: stm32: remove all child of DSI bridge when its probe failed

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Remove the child device of the STM32 DSI bridge when the driver probe
failed to stop futher probe request on panels used with STMicroelectronics
board (orisetech_otm8009a.c or raydium-rm68200.c driver).

This patch avoid the trace "cannot get reset GPIO" when
STM32MP157 device tree is used on stm32MP151 SOC without DSI support.

In this hw_version value is 0, as DSI bridge is absent and the panel
ofdata_to_platdata is called for each try of panel probe,
the gpio reset pin is requested but after dsi father probe failed).

For the next request, the PANEL ofdata_to_platdata failed as the gpio
is already used.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-03-04 13:10:33 +01:00 • committed by Patrice Chotard
parent e9470fcd27
commit a6d047c0a8
1 changed files with 3 additions and 0 deletions
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3
drivers/video/stm32/stm32_dsi.c
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@ -483,6 +483,9 @@ static int stm32_dsi_probe(struct udevice *dev)
if (priv->hw_version != HWVER_130 &&
priv->hw_version != HWVER_131) {
dev_err(dev, "DSI version 0x%x not supported\n", priv->hw_version);
dev_dbg(dev, "remove and unbind all DSI child\n");
device_chld_remove(dev, NULL, DM_REMOVE_NORMAL);
device_chld_unbind(dev, NULL);
ret = -ENODEV;
goto err_clk;
}