drm/amd/display: Add vupdate_no_lock interrupts for DCN2.1

When run igt@kms_vrr in a device that uses DCN2.1 architecture, we
noticed multiple failures. Furthermore, when we tested a VRR demo, we
noticed a system hang where the mouse pointer still works, but the
entire system freezes; in this case, we don't see any dmesg warning or
failure messages kernel. This happens due to a lack of vupdate_no_lock
interrupt, making the userspace wait eternally to get the event back.
For fixing this issue, we need to add the vupdate_no_lock interrupt in
the interrupt list.

Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Bindu Ramamurthy <bindu.r@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/display/dc/irq/dcn21/irq_service_dcn21.c b/drivers/gpu/drm/amd/display/dc/irq/dcn21/irq_service_dcn21.c
index 1b971265418b6667b60f6ecd9db90b72b9231186..0e0f494fbb5e138b1f739cd664252d2899c2fc12 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/irq/dcn21/irq_service_dcn21.c
+++ b/drivers/gpu/drm/amd/display/dc/irq/dcn21/irq_service_dcn21.c
@@ -168,6 +168,11 @@ static const struct irq_source_info_funcs vblank_irq_info_funcs = {
        .ack = NULL
 };
 
+static const struct irq_source_info_funcs vupdate_no_lock_irq_info_funcs = {
+       .set = NULL,
+       .ack = NULL
+};
+
 #undef BASE_INNER
 #define BASE_INNER(seg) DMU_BASE__INST0_SEG ## seg
 
@@ -230,6 +235,17 @@ static const struct irq_source_info_funcs vblank_irq_info_funcs = {
                .funcs = &vblank_irq_info_funcs\
        }
 
+/* vupdate_no_lock_int_entry maps to DC_IRQ_SOURCE_VUPDATEx, to match semantic
+ * of DCE's DC_IRQ_SOURCE_VUPDATEx.
+ */
+#define vupdate_no_lock_int_entry(reg_num)\
+       [DC_IRQ_SOURCE_VUPDATE1 + reg_num] = {\
+               IRQ_REG_ENTRY(OTG, reg_num,\
+                       OTG_GLOBAL_SYNC_STATUS, VUPDATE_NO_LOCK_INT_EN,\
+                       OTG_GLOBAL_SYNC_STATUS, VUPDATE_NO_LOCK_EVENT_CLEAR),\
+               .funcs = &vupdate_no_lock_irq_info_funcs\
+       }
+
 #define vblank_int_entry(reg_num)\
        [DC_IRQ_SOURCE_VBLANK1 + reg_num] = {\
                IRQ_REG_ENTRY(OTG, reg_num,\
@@ -338,6 +354,12 @@ irq_source_info_dcn21[DAL_IRQ_SOURCES_NUMBER] = {
        vupdate_int_entry(3),
        vupdate_int_entry(4),
        vupdate_int_entry(5),
+       vupdate_no_lock_int_entry(0),
+       vupdate_no_lock_int_entry(1),
+       vupdate_no_lock_int_entry(2),
+       vupdate_no_lock_int_entry(3),
+       vupdate_no_lock_int_entry(4),
+       vupdate_no_lock_int_entry(5),
        vblank_int_entry(0),
        vblank_int_entry(1),
        vblank_int_entry(2),