Commit e0bbcc62 authored by Douglas Anderson's avatar Douglas Anderson
Browse files

drm/bridge: ti-sn65dsi86: Add support for the DP AUX bus 



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: default avatarDouglas Anderson <dianders@chromium.org>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarLyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210611101711.v10.8.Ib5fe0638da85800141ce141bb8e441c5f25438d4@changeid
parent a1e3667a

drivers/gpu/drm/bridge/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/bridge/ti-sn65dsi86.c

+6 −0
Original line number Diff line number Diff line
@@ -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.