Patch "drm/amd/display: hpd rx irq not working with eDP interface" has been added to the 6.3-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/amd/display: hpd rx irq not working with eDP interface

to the 6.3-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amd-display-hpd-rx-irq-not-working-with-edp-inte.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 664f303c2e9f234a8715a31a13da2b55132f4ac0
Author: Robin Chen <robin.chen@xxxxxxx>
Date:   Fri Feb 17 20:47:57 2023 +0800

    drm/amd/display: hpd rx irq not working with eDP interface
    
    [ Upstream commit eeefe7c4820b6baa0462a8b723ea0a3b5846ccae ]
    
    [Why]
    This is the fix for the defect of commit ab144f0b4ad6
    ("drm/amd/display: Allow individual control of eDP hotplug support").
    
    [How]
    To revise the default eDP hotplug setting and use the enum to git rid
    of the magic number for different options.
    
    Fixes: ab144f0b4ad6 ("drm/amd/display: Allow individual control of eDP hotplug support")
    Cc: stable@xxxxxxxxxxxxxxx
    Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
    Reviewed-by: Wenjing Liu <Wenjing.Liu@xxxxxxx>
    Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx>
    Signed-off-by: Robin Chen <robin.chen@xxxxxxx>
    Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
    Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h
index f28b8597cc1e6..cba65766ef47b 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_types.h
@@ -1086,4 +1086,11 @@ struct dc_dpia_bw_alloc {
 };
 
 #define MAX_SINKS_PER_LINK 4
+
+enum dc_hpd_enable_select {
+	HPD_EN_FOR_ALL_EDP = 0,
+	HPD_EN_FOR_PRIMARY_EDP_ONLY,
+	HPD_EN_FOR_SECONDARY_EDP_ONLY,
+};
+
 #endif /* DC_TYPES_H_ */
diff --git a/drivers/gpu/drm/amd/display/dc/link/link_factory.c b/drivers/gpu/drm/amd/display/dc/link/link_factory.c
index aeb26a4d539e9..8aaf14afa4271 100644
--- a/drivers/gpu/drm/amd/display/dc/link/link_factory.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_factory.c
@@ -274,14 +274,18 @@ static bool dc_link_construct_phy(struct dc_link *link,
 				link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 
 			switch (link->dc->config.allow_edp_hotplug_detection) {
-			case 1: // only the 1st eDP handles hotplug
+			case HPD_EN_FOR_ALL_EDP:
+				link->irq_source_hpd_rx =
+						dal_irq_get_rx_source(link->hpd_gpio);
+				break;
+			case HPD_EN_FOR_PRIMARY_EDP_ONLY:
 				if (link->link_index == 0)
 					link->irq_source_hpd_rx =
 						dal_irq_get_rx_source(link->hpd_gpio);
 				else
 					link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 				break;
-			case 2: // only the 2nd eDP handles hotplug
+			case HPD_EN_FOR_SECONDARY_EDP_ONLY:
 				if (link->link_index == 1)
 					link->irq_source_hpd_rx =
 						dal_irq_get_rx_source(link->hpd_gpio);
@@ -289,6 +293,7 @@ static bool dc_link_construct_phy(struct dc_link *link,
 					link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 				break;
 			default:
+				link->irq_source_hpd = DC_IRQ_SOURCE_INVALID;
 				break;
 			}
 		}