From: Wayne Lin <Wayne.Lin@amd.com>
To: <amd-gfx@lists.freedesktop.org>
Cc: Harry Wentland <harry.wentland@amd.com>,
Leo Li <sunpeng.li@amd.com>,
Aurabindo Pillai <aurabindo.pillai@amd.com>,
Roman Li <roman.li@amd.com>, Wayne Lin <wayne.lin@amd.com>,
Tom Chung <chiahsuan.chung@amd.com>,
"Fangzhi Zuo" <jerry.zuo@amd.com>,
Zaeem Mohamed <zaeem.mohamed@amd.com>,
Solomon Chiu <solomon.chiu@amd.com>,
Daniel Wheeler <daniel.wheeler@amd.com>,
Alex Hung <alex.hung@amd.com>,
Hansen Dsouza <Hansen.Dsouza@amd.com>,
Charlene Liu <charlene.liu@amd.com>
Subject: [PATCH 04/27] drm/amd/display: read mso dpcd caps
Date: Tue, 25 Feb 2025 14:35:47 +0800 [thread overview]
Message-ID: <20250225063610.631461-5-Wayne.Lin@amd.com> (raw)
In-Reply-To: <20250225063610.631461-1-Wayne.Lin@amd.com>
From: Hansen Dsouza <Hansen.Dsouza@amd.com>
[Why & How]
Read if panel support multi-sst links
Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Signed-off-by: Hansen Dsouza <Hansen.Dsouza@amd.com>
Signed-off-by: Wayne Lin <wayne.lin@amd.com>
---
drivers/gpu/drm/amd/display/dc/dc_dp_types.h | 2 ++
.../display/dc/link/protocols/link_dp_capability.c | 11 +++++++++++
2 files changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h
index 8bb628ab7855..22c2173c687f 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_dp_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_dp_types.h
@@ -1220,6 +1220,8 @@ struct dpcd_caps {
struct replay_info pr_info;
uint16_t edp_oled_emission_rate;
union dp_receive_port0_cap receive_port0_cap;
+ /* Indicates the number of SST links supported by MSO (Multi-Stream Output) */
+ uint8_t mso_cap_sst_links_supported;
};
union dpcd_sink_ext_caps {
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
index 0785c030f6a6..da19f6a3b42b 100644
--- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
+++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_dp_capability.c
@@ -2100,6 +2100,17 @@ void detect_edp_sink_caps(struct dc_link *link)
core_link_read_dpcd(link, DP_SINK_EMISSION_RATE,
(uint8_t *)&link->dpcd_caps.edp_oled_emission_rate,
sizeof(link->dpcd_caps.edp_oled_emission_rate));
+
+ /*
+ * Read Multi-SST (Single Stream Transport) capability
+ * for eDP version 1.4 or higher.
+ */
+ if (link->dpcd_caps.dpcd_rev.raw >= DP_EDP_14)
+ core_link_read_dpcd(
+ link,
+ DP_EDP_MSO_LINK_CAPABILITIES,
+ (uint8_t *)&link->dpcd_caps.mso_cap_sst_links_supported,
+ sizeof(link->dpcd_caps.mso_cap_sst_links_supported));
}
bool dp_get_max_link_enc_cap(const struct dc_link *link, struct dc_link_settings *max_link_enc_cap)
--
2.37.3
next prev parent reply other threads:[~2025-02-25 6:36 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-25 6:35 [PATCH 00/27] DC Patches Feb. 25, 2025 Wayne Lin
2025-02-25 6:35 ` [PATCH 01/27] drm/amd/display: Request HW cursor on DCN3.2 with SubVP Wayne Lin
2025-02-25 6:35 ` [PATCH 02/27] drm/amd/display: Fix p-state type when p-state is unsupported Wayne Lin
2025-02-25 6:35 ` [PATCH 03/27] drm/amd/display: Fix DMUB reset sequence for DCN401 Wayne Lin
2025-02-25 6:35 ` Wayne Lin [this message]
2025-02-25 6:35 ` [PATCH 05/27] drm/amd/display: misc for dio encoder refactor Wayne Lin
2025-02-25 6:35 ` [PATCH 06/27] drm/amd/display: Skip checking FRL_MODE bit for PCON BW determination Wayne Lin
2025-02-25 6:35 ` [PATCH 07/27] drm/amd/display: Remove unused struct definition Wayne Lin
2025-02-25 6:35 ` [PATCH 08/27] drm/amd/display: Check NULL connector before it is used Wayne Lin
2025-02-25 6:35 ` [PATCH 09/27] drm/amd/display: Revert "Increase halt timeout for DMCUB to 1s" Wayne Lin
2025-02-25 6:35 ` [PATCH 10/27] drm/amd/display: Ensure DMCUB idle before reset on DCN31/DCN35 Wayne Lin
2025-02-25 6:35 ` [PATCH 11/27] drm/amd/display: Added visual confirm for DCC Wayne Lin
2025-02-25 6:35 ` [PATCH 12/27] drm/amd/display: wait for outstanding hw updates Wayne Lin
2025-02-25 6:35 ` [PATCH 13/27] drm/amd/display: Add tunneling IRQ handler Wayne Lin
2025-02-25 6:35 ` [PATCH 14/27] drm/amd/display: Change amdgpu_dm_irq_suspend() to void Wayne Lin
2025-02-25 6:35 ` [PATCH 15/27] drm/amd/display: Drop `ret` variable from dm_suspend() Wayne Lin
2025-02-25 6:35 ` [PATCH 16/27] drm/amd/display: Catch failures for amdgpu_dm_commit_zero_streams() Wayne Lin
2025-02-25 6:36 ` [PATCH 17/27] drm/amd/display: Use _free() macro " Wayne Lin
2025-02-25 6:36 ` [PATCH 18/27] drm/amd/display: Use drm_err() instead of DRM_ERROR in dm_resume() Wayne Lin
2025-02-25 6:36 ` [PATCH 19/27] drm/amd/display: Use scoped guard for dm_resume() Wayne Lin
2025-02-25 6:36 ` [PATCH 20/27] drm/amd/display: Change amdgpu_dm_irq_resume_*() to use drm_dbg() Wayne Lin
2025-02-25 6:36 ` [PATCH 21/27] drm/amd/display: Change amdgpu_dm_irq_resume_*() to void Wayne Lin
2025-02-25 6:36 ` [PATCH 22/27] drm/amd/display: Use _free(kfree) for dm_gpureset_commit_state() Wayne Lin
2025-02-25 6:36 ` [PATCH 23/27] drm/amd/display: Use scoped guard for amdgpu_dm_update_connector_after_detect() Wayne Lin
2025-02-25 6:36 ` [PATCH 24/27] drm/amd/display: Use _free() macro " Wayne Lin
2025-02-25 6:36 ` [PATCH 25/27] drm/amd/display: Use scoped guards for handle_hpd_irq_helper() Wayne Lin
2025-02-25 6:36 ` [PATCH 26/27] drm/amd/display: Use drm_err() " Wayne Lin
2025-02-25 6:36 ` [PATCH 27/27] drm/amd/display: Promote DAL to 3.2.323 Wayne Lin
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