From: Patrick Delaunay patrick.delaunay@st.com
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 ---
drivers/video/stm32/stm32_dsi.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/video/stm32/stm32_dsi.c b/drivers/video/stm32/stm32_dsi.c index 8891ca4b78..4027e978c8 100644 --- a/drivers/video/stm32/stm32_dsi.c +++ b/drivers/video/stm32/stm32_dsi.c @@ -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; }