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 Acked-by: Linus Walleij linus.walleij@linaro.org Reviewed-by: Lyude Paul lyude@redhat.com ---
(no changes since v9)
Changes in v9: - Rebased atop v9 ("Promote the AUX channel") patch.
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 | 6 ++++++ 2 files changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 85b673613687..431b6e12a81f 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -303,6 +303,7 @@ 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 8e61005cf4ad..32bd35c98d95 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> @@ -1426,12 +1427,17 @@ static int ti_sn_aux_probe(struct auxiliary_device *adev, const struct auxiliary_device_id *id) { struct ti_sn65dsi86 *pdata = dev_get_drvdata(adev->dev.parent); + int ret;
pdata->aux.name = "ti-sn65dsi86-aux"; pdata->aux.dev = &adev->dev; 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) + return ret; + /* * 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.