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drm/tegra: dpaux: Populate AUX bus

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[ Upstream commit 8913e1aea4b32a866343b14e565c62cec54f3f78 ]

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>
Stable-dep-of: 0800880f4eb7 ("drm/tegra: dpaux: Fix PM disable depth imbalance in tegra_dpaux_probe")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thierry Reding 2021-12-20 11:28:22 +01:00 committed by Sasha Levin
parent 93128052bf
commit 49ebcae0b9
2 changed files with 8 additions and 0 deletions
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1
drivers/gpu/drm/tegra/Kconfig
View File

@ -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

7
drivers/gpu/drm/tegra/dpaux.c
View File

@ -19,6 +19,7 @@
#include <linux/workqueue.h>
#include <drm/drm_dp_helper.h>
#include <drm/drm_dp_aux_bus.h>
#include <drm/drm_panel.h>
#include "dp.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;
}