On 8/29/2023 11:47 AM, Stephen Boyd wrote:
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@xxxxxxxxxxx>
Cc: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
Signed-off-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
Tested-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
Reviewed-by: Kuogee Hsieh <quic_khsieh@xxxxxxxxxxx>
---
drivers/gpu/drm/msm/dp/dp_link.c | 38 +++-----------------------------
1 file changed, 3 insertions(+), 35 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c
index 42427129acea..94a37914a47f 100644
--- a/drivers/gpu/drm/msm/dp/dp_link.c
+++ b/drivers/gpu/drm/msm/dp/dp_link.c
@@ -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);
