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drm/msm/dp: parse data-lanes as property of dp_out endpoint

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Add capability to parser data-lanes as property of dp_out endpoint.
Also retain the original capability to parser data-lanes as property
of mdss_dp node to handle legacy case.

Changes in v6:
-- first patch after split parser patch into two

Changes in v7:
-- check "data-lanes" from endpoint first

Changes in v14:
-- replace "parser" with "parse" at commit subject
-- add matching brackets at dp_parser_misc()

Changes in v15:
-- concise dp_parser_misc()

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/516096/
Link: https://lore.kernel.org/r/1672163103-31254-4-git-send-email-quic_khsieh@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
This commit is contained in:
Kuogee Hsieh
2022-12-27 09:45:01 -08:00
committed by Dmitry Baryshkov
parent 123f125550
commit d25cfeeec0
1 changed files with 13 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/gpu/drm/msm/dp/dp_parser.c
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@@ -94,16 +94,22 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
static int dp_parser_misc(struct dp_parser *parser)
{
struct device_node *of_node = parser->pdev->dev.of_node;
int len;
int cnt;
len = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES);
if (len < 0) {
DRM_WARN("Invalid property \"data-lanes\", default max DP lanes = %d\n",
DP_MAX_NUM_DP_LANES);
len = DP_MAX_NUM_DP_LANES;
/*
* data-lanes is the property of dp_out endpoint
*/
cnt = drm_of_get_data_lanes_count_ep(of_node, 1, 0, 1, DP_MAX_NUM_DP_LANES);
if (cnt < 0) {
/* legacy code, data-lanes is the property of mdss_dp node */
cnt = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES);
}
parser->max_dp_lanes = len;
if (cnt > 0)
parser->max_dp_lanes = cnt;
else
parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */
return 0;
}