Commit 1abd6b33 authored by Thierry Reding's avatar Thierry Reding
Browse files

drm/tegra: dp: Add drm_dp_link_reset() implementation 



Subsequent patches will add non-volatile fields to struct drm_dp_link,
so introduce a function to zero out only the volatile fields.

Signed-off-by: default avatarThierry Reding <treding@nvidia.com>
parent 0fa5c1bd

drivers/gpu/drm/tegra/dp.c

+12 −1
Original line number Diff line number Diff line
@@ -8,6 +8,17 @@ 


#include "dp.h"



static void drm_dp_link_reset(struct drm_dp_link *link)

{

	if (!link)

		return;



	link->revision = 0;

	link->rate = 0;

	link->num_lanes = 0;

	link->capabilities = 0;

}



/**

 * drm_dp_link_probe() - probe a DisplayPort link for capabilities

 * @aux: DisplayPort AUX channel
@@ -24,7 +35,7 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link) 
	u8 values[3];

	int err;



	memset(link, 0, sizeof(*link));

	drm_dp_link_reset(link);



	err = drm_dp_dpcd_read(aux, DP_DPCD_REV, values, sizeof(values));

	if (err < 0)