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drm/tegra: dp: Add drm_dp_link_reset() implementation

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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: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Thierry Reding 2015-12-03 11:44:17 +01:00
parent 0fa5c1bdd2
commit 1abd6b3304
1 changed files with 12 additions and 1 deletions
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13
drivers/gpu/drm/tegra/dp.c
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@ -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)