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@xxxxxxxxxxxx>
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Reviewed-by: Lyude Paul <lyude@xxxxxxxxxx>
---
(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.
--
2.32.0.272.g935e593368-goog
