From: Michel Dänzer <[email protected]>

Fixes misbehaviour when hotplugging DisplayPort connectors on secondary
GPUs.

Fixes: 14606e127f4b ("Handle Zaphod mode correctly in amdgpu_mode_hotplug")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98626
(Ported from radeon commit 9760ef33cba5795eddeda4d5c2fcbe2dcce21689)

Signed-off-by: Michel Dänzer <[email protected]>
---
 src/amdgpu_kms.c      |  5 +++++
 src/amdgpu_probe.h    |  2 ++
 src/drmmode_display.c | 23 ++++++++---------------
 3 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/src/amdgpu_kms.c b/src/amdgpu_kms.c
index b21cd37..bf9058e 100644
--- a/src/amdgpu_kms.c
+++ b/src/amdgpu_kms.c
@@ -1313,6 +1313,11 @@ Bool AMDGPUPreInit_KMS(ScrnInfoPtr pScrn, int flags)
                }
        }
 
+       if (info->IsSecondary)
+               pAMDGPUEnt->secondary_scrn = pScrn;
+       else
+               pAMDGPUEnt->primary_scrn = pScrn;
+
        info->PciInfo = xf86GetPciInfoForEntity(info->pEnt->index);
        pScrn->monitor = pScrn->confScreen->monitor;
 
diff --git a/src/amdgpu_probe.h b/src/amdgpu_probe.h
index e6af3a2..802df12 100644
--- a/src/amdgpu_probe.h
+++ b/src/amdgpu_probe.h
@@ -93,6 +93,8 @@ typedef struct {
        unsigned long fd_wakeup_registered;     /* server generation for which 
fd has been registered for wakeup handling */
        int fd_wakeup_ref;
        unsigned int assigned_crtcs;
+       ScrnInfoPtr primary_scrn;
+       ScrnInfoPtr secondary_scrn;
        struct xf86_platform_device *platform_dev;
 } AMDGPUEntRec, *AMDGPUEntPtr;
 
diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 0ca78e0..a75cc5c 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -2402,7 +2402,7 @@ amdgpu_mode_hotplug(ScrnInfoPtr scrn, drmmode_ptr drmmode)
        xf86CrtcConfigPtr config = XF86_CRTC_CONFIG_PTR(scrn);
        AMDGPUEntPtr pAMDGPUEnt = AMDGPUEntPriv(scrn);
        drmModeResPtr mode_res;
-       int i, j, s;
+       int i, j;
        Bool found;
        Bool changed = FALSE;
        int num_dvi = 0, num_hdmi = 0;
@@ -2439,20 +2439,13 @@ restart_destroy:
 
        /* find new output ids we don't have outputs for */
        for (i = 0; i < mode_res->count_connectors; i++) {
-               found = FALSE;
-
-               for (s = 0; !found && s < xf86NumScreens; s++) {
-                       ScrnInfoPtr loop_scrn = xf86Screens[s];
-
-                       if (strcmp(loop_scrn->driverName, scrn->driverName) ||
-                           AMDGPUEntPriv(loop_scrn) != pAMDGPUEnt)
-                               continue;
-
-                       found = drmmode_find_output(loop_scrn,
-                                                   mode_res->connectors[i],
-                                                   &num_dvi, &num_hdmi);
-               }
-               if (found)
+               if (drmmode_find_output(pAMDGPUEnt->primary_scrn,
+                                       mode_res->connectors[i],
+                                       &num_dvi, &num_hdmi) ||
+                   (pAMDGPUEnt->secondary_scrn &&
+                    drmmode_find_output(pAMDGPUEnt->secondary_scrn,
+                                        mode_res->connectors[i],
+                                        &num_dvi, &num_hdmi)))
                        continue;
 
                if (drmmode_output_init(scrn, drmmode, mode_res, i, &num_dvi,
-- 
2.10.2

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