| Message ID | bf90de303a5dbc587517fe4a1bb437e198b90198.1649262368.git.hns@goldelico.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | MIPS: JZ4780 and CI20 HDMI | expand |
Hi Nikolaus, Thank you for the patch. On Wed, Apr 06, 2022 at 06:26:08PM +0200, H. Nikolaus Schaller wrote: > "hdmi-connector.yaml" bindings defines an optional property > "ddc-en-gpios" for a single gpio to enable DDC operation. > > Usually this controls +5V power on the HDMI connector. > This +5V may also be needed for HPD. > > This was not reflected in code but is needed to make the CI20 > board work. > > Now, the driver activates the ddc gpio after probe and > deactivates after remove so it is "almost on". > > But only if this driver is loaded (and not e.g. blacklisted > as module). > > Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > --- > drivers/gpu/drm/bridge/display-connector.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c > index d24f5b90feabf..e4d52a7e31b71 100644 > --- a/drivers/gpu/drm/bridge/display-connector.c > +++ b/drivers/gpu/drm/bridge/display-connector.c > @@ -24,6 +24,7 @@ struct display_connector { > int hpd_irq; > > struct regulator *dp_pwr; > + struct gpio_desc *ddc_en; > }; > > static inline struct display_connector * > @@ -345,6 +346,17 @@ static int display_connector_probe(struct platform_device *pdev) > } > } > > + /* enable DDC */ > + if (type == DRM_MODE_CONNECTOR_HDMIA) { > + conn->ddc_en = devm_gpiod_get_optional(&pdev->dev, "ddc-en", > + GPIOD_OUT_HIGH); > + > + if (IS_ERR(conn->ddc_en)) { > + dev_err(&pdev->dev, "Couldn't get ddc-en gpio\n"); > + return PTR_ERR(conn->ddc_en); > + } > + } > + > conn->bridge.funcs = &display_connector_bridge_funcs; > conn->bridge.of_node = pdev->dev.of_node; > > @@ -373,6 +385,9 @@ static int display_connector_remove(struct platform_device *pdev) > { > struct display_connector *conn = platform_get_drvdata(pdev); > > + if (conn->ddc_en) > + gpiod_set_value(conn->ddc_en, 0); > + > if (conn->dp_pwr) > regulator_disable(conn->dp_pwr); >
Hi Laurent, > Am 07.04.2022 um 09:30 schrieb Laurent Pinchart <laurent.pinchart@ideasonboard.com>: > > Hi Nikolaus, > > Thank you for the patch. > > On Wed, Apr 06, 2022 at 06:26:08PM +0200, H. Nikolaus Schaller wrote: >> "hdmi-connector.yaml" bindings defines an optional property >> "ddc-en-gpios" for a single gpio to enable DDC operation. >> >> Usually this controls +5V power on the HDMI connector. >> This +5V may also be needed for HPD. >> >> This was not reflected in code but is needed to make the CI20 >> board work. >> >> Now, the driver activates the ddc gpio after probe and >> deactivates after remove so it is "almost on". >> >> But only if this driver is loaded (and not e.g. blacklisted >> as module). >> >> Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Added to v18 (which is needed to remove some now redundant patches and fix a detail in the ingenic-drm driver). BR and thanks for review, Nikolaus
diff --git a/drivers/gpu/drm/bridge/display-connector.c b/drivers/gpu/drm/bridge/display-connector.c index d24f5b90feabf..e4d52a7e31b71 100644 --- a/drivers/gpu/drm/bridge/display-connector.c +++ b/drivers/gpu/drm/bridge/display-connector.c @@ -24,6 +24,7 @@ struct display_connector { int hpd_irq; struct regulator *dp_pwr; + struct gpio_desc *ddc_en; }; static inline struct display_connector * @@ -345,6 +346,17 @@ static int display_connector_probe(struct platform_device *pdev) } } + /* enable DDC */ + if (type == DRM_MODE_CONNECTOR_HDMIA) { + conn->ddc_en = devm_gpiod_get_optional(&pdev->dev, "ddc-en", + GPIOD_OUT_HIGH); + + if (IS_ERR(conn->ddc_en)) { + dev_err(&pdev->dev, "Couldn't get ddc-en gpio\n"); + return PTR_ERR(conn->ddc_en); + } + } + conn->bridge.funcs = &display_connector_bridge_funcs; conn->bridge.of_node = pdev->dev.of_node; @@ -373,6 +385,9 @@ static int display_connector_remove(struct platform_device *pdev) { struct display_connector *conn = platform_get_drvdata(pdev); + if (conn->ddc_en) + gpiod_set_value(conn->ddc_en, 0); + if (conn->dp_pwr) regulator_disable(conn->dp_pwr);
"hdmi-connector.yaml" bindings defines an optional property "ddc-en-gpios" for a single gpio to enable DDC operation. Usually this controls +5V power on the HDMI connector. This +5V may also be needed for HPD. This was not reflected in code but is needed to make the CI20 board work. Now, the driver activates the ddc gpio after probe and deactivates after remove so it is "almost on". But only if this driver is loaded (and not e.g. blacklisted as module). Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com> --- drivers/gpu/drm/bridge/display-connector.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)