| Message ID | 20210517130450.v7.8.Ib5fe0638da85800141ce141bb8e441c5f25438d4@changeid (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | drm: Fix EDID reading on ti-sn65dsi86 by introducing the DP AUX bus | expand |
On Mon, May 17, 2021 at 10:09 PM Douglas Anderson <dianders@chromium.org> wrote: > We want to provide our panel with access to the DP AUX channel. The > way to do this is to let our panel be a child of ours using the fancy > new DP AUX bus support. > > Signed-off-by: Douglas Anderson <dianders@chromium.org> That's neat. Acked-by: Linus Walleij <linus.walleij@linaro.org> Yours, Linus Walleij
For 7 and 8: Reviewed-by: Lyude Paul <lyude@redhat.com> On Mon, 2021-05-17 at 13:09 -0700, Douglas Anderson wrote: > We want to provide our panel with access to the DP AUX channel. The > way to do this is to let our panel be a child of ours using the fancy > new DP AUX bus support. > > Signed-off-by: Douglas Anderson <dianders@chromium.org> > --- > > Changes in v7: > - Patch to support for DP AUX bus on ti-sn65dsi86 new for v7. > > drivers/gpu/drm/bridge/Kconfig | 1 + > drivers/gpu/drm/bridge/ti-sn65dsi86.c | 13 +++++++++++-- > 2 files changed, 12 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig > index d25e900f07ef..294d0bdd4cbe 100644 > --- a/drivers/gpu/drm/bridge/Kconfig > +++ b/drivers/gpu/drm/bridge/Kconfig > @@ -280,6 +280,7 @@ config DRM_TI_SN65DSI86 > select DRM_PANEL > select DRM_MIPI_DSI > select AUXILIARY_BUS > + select DRM_DP_AUX_BUS > help > Texas Instruments SN65DSI86 DSI to eDP Bridge driver > > diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c > b/drivers/gpu/drm/bridge/ti-sn65dsi86.c > index 42a55d13864b..a59497f7e504 100644 > --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c > +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c > @@ -23,6 +23,7 @@ > #include <drm/drm_atomic.h> > #include <drm/drm_atomic_helper.h> > #include <drm/drm_bridge.h> > +#include <drm/drm_dp_aux_bus.h> > #include <drm/drm_dp_helper.h> > #include <drm/drm_mipi_dsi.h> > #include <drm/drm_of.h> > @@ -1446,19 +1447,27 @@ static int ti_sn_aux_probe(struct auxiliary_device > *adev, > pdata->aux.transfer = ti_sn_aux_transfer; > drm_dp_aux_init(&pdata->aux); > > + ret = devm_of_dp_aux_populate_ep_devices(&pdata->aux); > + if (ret) > + goto err; > + > /* > * The eDP to MIPI bridge parts don't work until the AUX channel is > * setup so we don't add it in the main driver probe, we add it now. > */ > ret = ti_sn65dsi86_add_aux_device(pdata, &pdata->bridge_aux, > "bridge"); > > + if (ret) > + goto err; > + > + return 0; > +err: > /* > * Clear of_node on any errors. Really this only matters if the > error > * is -EPROBE_DEFER to avoid (again) keep pinctrl from claiming when > * it tries the probe again, but it shouldn't hurt on any error. > */ > - if (ret) > - adev->dev.of_node = NULL; > + adev->dev.of_node = NULL; > > return ret; > }
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index d25e900f07ef..294d0bdd4cbe 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -280,6 +280,7 @@ config DRM_TI_SN65DSI86 select DRM_PANEL select DRM_MIPI_DSI select AUXILIARY_BUS + select DRM_DP_AUX_BUS help Texas Instruments SN65DSI86 DSI to eDP Bridge driver diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index 42a55d13864b..a59497f7e504 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -23,6 +23,7 @@ #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_bridge.h> +#include <drm/drm_dp_aux_bus.h> #include <drm/drm_dp_helper.h> #include <drm/drm_mipi_dsi.h> #include <drm/drm_of.h> @@ -1446,19 +1447,27 @@ static int ti_sn_aux_probe(struct auxiliary_device *adev, pdata->aux.transfer = ti_sn_aux_transfer; drm_dp_aux_init(&pdata->aux); + ret = devm_of_dp_aux_populate_ep_devices(&pdata->aux); + if (ret) + goto err; + /* * The eDP to MIPI bridge parts don't work until the AUX channel is * setup so we don't add it in the main driver probe, we add it now. */ ret = ti_sn65dsi86_add_aux_device(pdata, &pdata->bridge_aux, "bridge"); + if (ret) + goto err; + + return 0; +err: /* * Clear of_node on any errors. Really this only matters if the error * is -EPROBE_DEFER to avoid (again) keep pinctrl from claiming when * it tries the probe again, but it shouldn't hurt on any error. */ - if (ret) - adev->dev.of_node = NULL; + adev->dev.of_node = NULL; return ret; }
We want to provide our panel with access to the DP AUX channel. The way to do this is to let our panel be a child of ours using the fancy new DP AUX bus support. Signed-off-by: Douglas Anderson <dianders@chromium.org> --- Changes in v7: - Patch to support for DP AUX bus on ti-sn65dsi86 new for v7. drivers/gpu/drm/bridge/Kconfig | 1 + drivers/gpu/drm/bridge/ti-sn65dsi86.c | 13 +++++++++++-- 2 files changed, 12 insertions(+), 2 deletions(-)