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

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commit 688f97ed3f5e339c0c2c09d9ee7ff23d5807b0a7 upstream.

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>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rodrigo Siqueira 2021-02-05 14:15:11 -05:00 committed by Greg Kroah-Hartman
parent 22f2bf0892
commit c4fe9c525e
1 changed files with 22 additions and 0 deletions
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22
drivers/gpu/drm/amd/display/dc/irq/dcn21/irq_service_dcn21.c
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@ -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),