Re: [PATCH 1/2] drm/tegra: dpaux: Populate AUX bus

20.12.2021 13:48, Thierry Reding пишет:

From: Thierry Reding treding@nvidia.com

The DPAUX hardware block exposes an DP AUX interface that provides access to an AUX bus and the devices on that bus. Use the DP AUX bus infrastructure that was recently introduced to probe devices on this bus from DT.

Signed-off-by: Thierry Reding treding@nvidia.com

drivers/gpu/drm/tegra/Kconfig | 1 + drivers/gpu/drm/tegra/dpaux.c | 7 +++++++ 2 files changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/tegra/Kconfig b/drivers/gpu/drm/tegra/Kconfig index 8cf5aeb9db6c..201f5175ecfe 100644 --- a/drivers/gpu/drm/tegra/Kconfig +++ b/drivers/gpu/drm/tegra/Kconfig @@ -5,6 +5,7 @@ config DRM_TEGRA depends on COMMON_CLK depends on DRM depends on OF

• select DRM_DP_AUX_BUS select DRM_KMS_HELPER select DRM_MIPI_DSI select DRM_PANEL

diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c index 1f96e416fa08..9da1edcdc835 100644 --- a/drivers/gpu/drm/tegra/dpaux.c +++ b/drivers/gpu/drm/tegra/dpaux.c @@ -18,6 +18,7 @@ #include <linux/reset.h> #include <linux/workqueue.h>

+#include <drm/drm_dp_aux_bus.h> #include <drm/drm_dp_helper.h> #include <drm/drm_panel.h>

@@ -570,6 +571,12 @@ static int tegra_dpaux_probe(struct platform_device *pdev) list_add_tail(&dpaux->list, &dpaux_list); mutex_unlock(&dpaux_lock);

• err = devm_of_dp_aux_populate_ep_devices(&dpaux->aux);
• if (err < 0) {

• dev_err(dpaux->dev, "failed to populate AUX bus: %d\n", err);
  

• return err;
  

• }
• return 0;

}

Needs stable tag for 5.15+.