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drm/msm/dp: Inline dp_link_parse_sink_count()

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The function dp_link_parse_sink_count() is really just
drm_dp_read_sink_count(). It debug prints out the bit for content
protection (DP_SINK_CP_READY), but that is not useful beyond debug
because 'link->dp_link.sink_count' is overwritten to only contain the
sink_count in this same function. Just use drm_dp_read_sink_count() in
the one place this function is called to simplify.

Cc: Vinod Polimera <quic_vpolimer@quicinc.com>
Cc: Kuogee Hsieh <quic_khsieh@quicinc.com>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/554987/
Link: https://lore.kernel.org/r/20230829184735.2841739-7-swboyd@chromium.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Stephen Boyd 2023-08-29 11:47:31 -07:00 committed by Dmitry Baryshkov
parent 634e9da255
commit c0977e0dd8
1 changed files with 3 additions and 35 deletions
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38
drivers/gpu/drm/msm/dp/dp_link.c
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@ -712,49 +712,17 @@ static int dp_link_parse_request(struct dp_link_private *link)
return ret;
}
/**
* dp_link_parse_sink_count() - parses the sink count
* @dp_link: pointer to link module data
*
* Parses the DPCD to check if there is an update to the sink count
* (Byte 0x200), and whether all the sink devices connected have Content
* Protection enabled.
*/
static int dp_link_parse_sink_count(struct dp_link *dp_link)
{
ssize_t rlen;
bool cp_ready;
struct dp_link_private *link = container_of(dp_link,
struct dp_link_private, dp_link);
rlen = drm_dp_dpcd_readb(link->aux, DP_SINK_COUNT,
&link->dp_link.sink_count);
if (rlen < 0) {
DRM_ERROR("sink count read failed. rlen=%zd\n", rlen);
return rlen;
}
cp_ready = link->dp_link.sink_count & DP_SINK_CP_READY;
link->dp_link.sink_count =
DP_GET_SINK_COUNT(link->dp_link.sink_count);
drm_dbg_dp(link->drm_dev, "sink_count = 0x%x, cp_ready = 0x%x\n",
link->dp_link.sink_count, cp_ready);
return 0;
}
static int dp_link_parse_sink_status_field(struct dp_link_private *link)
{
int len = 0;
int len;
link->prev_sink_count = link->dp_link.sink_count;
len = dp_link_parse_sink_count(&link->dp_link);
len = drm_dp_read_sink_count(link->aux);
if (len < 0) {
DRM_ERROR("DP parse sink count failed\n");
return len;
}
link->dp_link.sink_count = len;
len = drm_dp_dpcd_read_link_status(link->aux,
link->link_status);