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drm/dp: Add helper to dump an LTTPR PHY descriptor

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Add a helper to dump the DPCD descriptor for an LTTPR PHY. This is based
on [1] and [2] moving the helper to DRM core as suggested by Ville.

[1] https://lore.kernel.org/all/20240703155937.1674856-5-imre.deak@intel.com
[2] https://lore.kernel.org/all/20240703155937.1674856-6-imre.deak@intel.com

Cc: dri-devel@lists.freedesktop.org
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240708190029.271247-6-imre.deak@intel.com
This commit is contained in:
Imre Deak
2024-07-08 22:00:28 +03:00
parent 993d36ac99
commit 0daf44ea9d
3 changed files with 62 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/drm/display/drm_dp.h
View File

@@ -1523,6 +1523,10 @@ enum drm_dp_phy {
#define DP_SYMBOL_ERROR_COUNT_LANE2_PHY_REPEATER1 0xf0039 /* 1.3 */
#define DP_SYMBOL_ERROR_COUNT_LANE3_PHY_REPEATER1 0xf003b /* 1.3 */
#define DP_OUI_PHY_REPEATER1 0xf003d /* 1.3 */
#define DP_OUI_PHY_REPEATER(dp_phy) \
DP_LTTPR_REG(dp_phy, DP_OUI_PHY_REPEATER1)
#define __DP_FEC1_BASE 0xf0290 /* 1.4 */
#define __DP_FEC2_BASE 0xf0298 /* 1.4 */
#define DP_FEC_BASE(dp_phy) \

2
include/drm/display/drm_dp_helper.h
View File

@@ -656,6 +656,8 @@ struct drm_dp_desc {
int drm_dp_read_desc(struct drm_dp_aux *aux, struct drm_dp_desc *desc,
bool is_branch);
int drm_dp_dump_lttpr_desc(struct drm_dp_aux *aux, enum drm_dp_phy dp_phy);
/**
* enum drm_dp_quirk - Display Port sink/branch device specific quirks
*