drm/nouveau/disp: PIOR DP uses GPIO for HPD, not PMGR AUX interrupts

Fixes crash on boards with ANX9805 TMDS/DP encoders.

Cc: stable@vger.kernel.org # 6.4+
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230719044051.6975-2-skeggsb@gmail.com

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c
index dad942b..46b057f 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/disp/uconn.c
@@ -81,20 +81,29 @@ nvkm_uconn_uevent(struct nvkm_object *object, void *argv, u32 argc, struct nvkm_
                return -ENOSYS;
 
        list_for_each_entry(outp, &conn->disp->outps, head) {
-               if (outp->info.connector == conn->index && outp->dp.aux) {
-                       if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG  ) bits |= NVKM_I2C_PLUG;
-                       if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_I2C_UNPLUG;
-                       if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ   ) bits |= NVKM_I2C_IRQ;
+               if (outp->info.connector == conn->index)
+                       break;
+       }
 
-                       return nvkm_uevent_add(uevent, &device->i2c->event, outp->dp.aux->id, bits,
-                                              nvkm_uconn_uevent_aux);
-               }
+       if (&outp->head == &conn->disp->outps)
+               return -EINVAL;
+
+       if (outp->dp.aux && !outp->info.location) {
+               if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG  ) bits |= NVKM_I2C_PLUG;
+               if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_I2C_UNPLUG;
+               if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ   ) bits |= NVKM_I2C_IRQ;
+
+               return nvkm_uevent_add(uevent, &device->i2c->event, outp->dp.aux->id, bits,
+                                      nvkm_uconn_uevent_aux);
        }
 
        if (args->v0.types & NVIF_CONN_EVENT_V0_PLUG  ) bits |= NVKM_GPIO_HI;
        if (args->v0.types & NVIF_CONN_EVENT_V0_UNPLUG) bits |= NVKM_GPIO_LO;
-       if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ)
-               return -EINVAL;
+       if (args->v0.types & NVIF_CONN_EVENT_V0_IRQ) {
+               /* TODO: support DP IRQ on ANX9805 and remove this hack. */
+               if (!outp->info.location)
+                       return -EINVAL;
+       }
 
        return nvkm_uevent_add(uevent, &device->gpio->event, conn->info.hpd, bits,
                               nvkm_uconn_uevent_gpio);