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drm/msm/dp: Use drm_dp_read_sink_count() helper

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Use the common function drm_dp_read_sink_count() instead of open-coding
it. This shrinks the kernel text a tiny bit.

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/554983/
Link: https://lore.kernel.org/r/20230829184735.2841739-3-swboyd@chromium.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Stephen Boyd 2023-08-29 11:47:27 -07:00 committed by Dmitry Baryshkov
parent 744077f94e
commit b7ba5db9c8
1 changed files with 7 additions and 12 deletions
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19
drivers/gpu/drm/msm/dp/dp_panel.c
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@ -147,8 +147,8 @@ static int dp_panel_update_modes(struct drm_connector *connector,
int dp_panel_read_sink_caps(struct dp_panel *dp_panel,
struct drm_connector *connector)
{
int rc = 0, bw_code;
int rlen, count;
int rc, bw_code;
int count;
struct dp_panel_private *panel;
if (!dp_panel || !connector) {
@ -174,16 +174,11 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel,
}
if (dp_panel->dfp_present) {
rlen = drm_dp_dpcd_read(panel->aux, DP_SINK_COUNT,
&count, 1);
if (rlen == 1) {
count = DP_GET_SINK_COUNT(count);
if (!count) {
DRM_ERROR("no downstream ports connected\n");
panel->link->sink_count = 0;
rc = -ENOTCONN;
goto end;
}
count = drm_dp_read_sink_count(panel->aux);
if (!count) {
DRM_ERROR("no downstream ports connected\n");
panel->link->sink_count = 0;
return -ENOTCONN;
}
}