Hi Enric,
Am Freitag, 2. März 2018, 13:09:02 CET schrieb Enric Balletbo i Serra:
Hi Heiko,
On 01/03/18 16:50, Heiko Stübner wrote:
Hi Jeffy, Thierry, Enric,
Am Mittwoch, 10. Januar 2018, 17:23:44 CET schrieb Thierry Escande:
From: Jeffy Chen jeffy.chen@rock-chips.com
Add missing pm_runtime_disable() in bind()'s error handling path.
Also cleanup encoder & connector in unbind().
Can you please split all these surprise "Also" sections into separate patches?
I'll take a look.
It looks like this is true for all following patch to some degree and the inno-hdmi patch even has a unbind reordering-change without mentioning it in the commit message.
Actually, I think this patch is not correct against current mainline, see below.
Thanks Heiko
Fixes: 80a9a059d4e4 ("drm/rockchip/dsi: add dw-mipi power domain support") Signed-off-by: Jeffy Chen jeffy.chen@rock-chips.com Signed-off-by: Thierry Escande thierry.escande@collabora.com
drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c index b1fe0639227e..78e6b7919bf7 100644 --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c @@ -1282,7 +1282,7 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master, ret = dw_mipi_dsi_register(drm, dsi); if (ret) { DRM_DEV_ERROR(dev, "Failed to register mipi_dsi: %d\n", ret);
goto err_pllref;
goto err_disable_pllref;}
dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
@@ -1290,24 +1290,25 @@ static int dw_mipi_dsi_bind(struct device *dev, struct device *master, ret = mipi_dsi_host_register(&dsi->dsi_host); if (ret) { DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret);
goto err_cleanup;
goto err_disable_pm_runtime;}
if (!dsi->panel) { ret = -EPROBE_DEFER;
goto err_mipi_dsi_host;
goto err_unreg_mipi_dsi_host;}
dev_set_drvdata(dev, dsi); pm_runtime_enable(dev); return 0;
-err_mipi_dsi_host: +err_unreg_mipi_dsi_host: mipi_dsi_host_unregister(&dsi->dsi_host); -err_cleanup:
- drm_encoder_cleanup(&dsi->encoder);
- drm_connector_cleanup(&dsi->connector);
-err_pllref: +err_disable_pm_runtime:
- pm_runtime_disable(dev);
I think that this is not required, 'pm_runtime_enable' is called just before the 'return 0' (see above). Commit 517f56839f58 'drm/rockchip: dw-mipi-dsi: fix possible un-balanced runtime PM enable' moved the call to that place. So, now the call to pm_runtime_disable is not needed.
- dsi->connector.funcs->destroy(&dsi->connector);
- dsi->encoder.funcs->destroy(&dsi->encoder);
Here, there is a reordering and also a function replacement. The reorder makes sense to me, first cleanup the connector and then the encoder, but I'm not sure about the function change and if is needed, anyway, in the case is needed, shouldn't be
- drm_connector_cleanup(&dsi->connector);
- drm_encoder_cleanup(&dsi->encoder);
instead?
If you look at drm/rockchip/dw-mipi-dsi.c you'll see that dw_mipi_dsi_drm_connector_destroy() does both connector_unregister() and drm_connector_cleanup().
And looking at other drivers it really seems that calling that destroy callback is really the way to go.
Heiko