On 12/8/23 17:58, Simon Horman wrote:
> On Mon, Dec 04, 2023 at 11:11:12AM +0100, Raphael Gallais-Pou wrote:
>
> ...
>
>> @@ -514,18 +675,40 @@ static int dw_mipi_dsi_stm_probe(struct
>> platform_device *pdev)
>> dsi->lane_max_kbps *= 2;
>> }
>>
>> - dw_mipi_dsi_stm_plat_data.base = dsi->base;
>> - dw_mipi_dsi_stm_plat_data.priv_data = dsi;
>> + dsi->pdata = *pdata;
>> + dsi->pdata.base = dsi->base;
>> + dsi->pdata.priv_data = dsi;
>> +
>> + dsi->pdata.max_data_lanes = 2;
>> + dsi->pdata.phy_ops = &dw_mipi_dsi_stm_phy_ops;
>>
>> platform_set_drvdata(pdev, dsi);
>>
>> - dsi->dsi = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
>> + dsi->dsi = dw_mipi_dsi_probe(pdev, &dsi->pdata);
>> if (IS_ERR(dsi->dsi)) {
>> ret = PTR_ERR(dsi->dsi);
>> dev_err_probe(dev, ret, "Failed to initialize mipi dsi host\n");
>> goto err_dsi_probe;
>> }
>>
>> + /*
>> + * We need to wait for the generic bridge to probe before enabling and
>> + * register the internal pixel clock.
>> + */
>> + ret = clk_prepare_enable(dsi->pclk);
>> + if (ret) {
>> + DRM_ERROR("%s: Failed to enable peripheral clk\n", __func__);
>> + goto err_dsi_probe;
>> + }
>> +
>> + ret = dw_mipi_dsi_clk_register(dsi, dev);
>> + if (ret) {
>> + DRM_ERROR("Failed to register DSI pixel clock: %d\n", ret);
> Hi Raphael,
Hi Simon,
You are right, dsi->clk needs to be disabled in case the clock register fails
before exiting the probe.
I've sent a v3, which normally fixes it.
Regards,
Raphaël
>
> Does clk_disable_unprepare(dsi->pclk) need to be added to this unwind
> chain?
>
> Flagged by Smatch.
>
>> + goto err_dsi_probe;
>> + }
>> +
>> + clk_disable_unprepare(dsi->pclk);
>> +
>> return 0;
>>
>> err_dsi_probe:
> ...
