drm/nouveau/kms/nv50-: init hpd_irq_lock for PIOR DP

Fixes OOPS on boards with ANX9805 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/20230719044051.6975-3-skeggsb@gmail.com

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index 38d3fad0d97a784229f69be1a11ff1953d0dfed9..1bec819da8766c24812c31d63a42a26f235fecca 100644 (file)
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -1877,6 +1877,8 @@ nv50_pior_destroy(struct drm_encoder *encoder)
        nvif_outp_dtor(&nv_encoder->outp);
 
        drm_encoder_cleanup(encoder);
+
+       mutex_destroy(&nv_encoder->dp.hpd_irq_lock);
        kfree(encoder);
 }
 
@@ -1921,6 +1923,8 @@ nv50_pior_create(struct drm_connector *connector, struct dcb_output *dcbe)
        nv_encoder->i2c = ddc;
        nv_encoder->aux = aux;
 
+       mutex_init(&nv_encoder->dp.hpd_irq_lock);
+
        encoder = to_drm_encoder(nv_encoder);
        encoder->possible_crtcs = dcbe->heads;
        encoder->possible_clones = 0;