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Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4693-drm-amd-display-Save-restore-link-setting-for-disabl.patch')
-rw-r--r--meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4693-drm-amd-display-Save-restore-link-setting-for-disabl.patch50
1 files changed, 50 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4693-drm-amd-display-Save-restore-link-setting-for-disabl.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4693-drm-amd-display-Save-restore-link-setting-for-disabl.patch
new file mode 100644
index 00000000..c1ff8623
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/4693-drm-amd-display-Save-restore-link-setting-for-disabl.patch
@@ -0,0 +1,50 @@
+From 427f0e33f6917ce94cf794568d357bbe66bf4d7f Mon Sep 17 00:00:00 2001
+From: Hugo Hu <hugo.hu@amd.com>
+Date: Wed, 13 Nov 2019 16:18:09 -0500
+Subject: [PATCH 4693/4736] drm/amd/display: Save/restore link setting for
+ disable phy when link retraining
+
+[Why]
+The link setting will be modify after disable phy
+and due to DP Compliance Fails.
+
+[How]
+Save and resotre link setting for disable link phy when link retraining.
+
+Signed-off-by: Hugo Hu <hugo.hu@amd.com>
+Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
+Acked-by: Leo Li <sunpeng.li@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+index 486c14e0cd41..015fa0c52746 100644
+--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
++++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+@@ -2788,9 +2788,9 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd
+ union hpd_irq_data hpd_irq_dpcd_data = { { { {0} } } };
+ union device_service_irq device_service_clear = { { 0 } };
+ enum dc_status result;
+-
+ bool status = false;
+ struct pipe_ctx *pipe_ctx;
++ struct dc_link_settings previous_link_settings;
+ int i;
+
+ if (out_link_loss)
+@@ -2873,9 +2873,10 @@ bool dc_link_handle_hpd_rx_irq(struct dc_link *link, union hpd_irq_data *out_hpd
+ if (pipe_ctx == NULL || pipe_ctx->stream == NULL)
+ return false;
+
++ previous_link_settings = link->cur_link_settings;
+ dp_disable_link_phy(link, pipe_ctx->stream->signal);
+
+- perform_link_training_with_retries(&link->cur_link_settings,
++ perform_link_training_with_retries(&previous_link_settings,
+ true, LINK_TRAINING_ATTEMPTS,
+ pipe_ctx,
+ pipe_ctx->stream->signal);
+--
+2.17.1
+