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| author | Anatoliy Klymenko <anatoliy.klymenko@amd.com> | 2024-01-23 18:54:00 -0800 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> | 2024-02-07 15:17:18 +0200 |
| commit | 7717fc5b22e59975c88a8f2b222b5cee4531de61 (patch) | |
| tree | dec3e94f9d40c743f4c81a36726cc194f297f5f0 /drivers/gpu/drm/xlnx | |
| parent | b214b37c902d25623b4a1265f485f34e0e3024c0 (diff) | |
| download | linux-stable-7717fc5b22e59975c88a8f2b222b5cee4531de61.tar.gz linux-stable-7717fc5b22e59975c88a8f2b222b5cee4531de61.tar.bz2 linux-stable-7717fc5b22e59975c88a8f2b222b5cee4531de61.zip | |
drm: xlnx: zynqmp_dpsub: Clear status register ASAP
Clear status register as soon as we read it.
Addressing comments from
https://lore.kernel.org/dri-devel/beb551c7-bb7e-4cd0-b166-e9aad90c4620@ideasonboard.com/
Signed-off-by: Anatoliy Klymenko <anatoliy.klymenko@amd.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240124025402.373620-4-anatoliy.klymenko@amd.com
Diffstat (limited to 'drivers/gpu/drm/xlnx')
| -rw-r--r-- | drivers/gpu/drm/xlnx/zynqmp_dp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c index d60b7431603f..5a3335e1fffa 100644 --- a/drivers/gpu/drm/xlnx/zynqmp_dp.c +++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c @@ -1624,6 +1624,8 @@ static irqreturn_t zynqmp_dp_irq_handler(int irq, void *data) u32 status, mask; status = zynqmp_dp_read(dp, ZYNQMP_DP_INT_STATUS); + /* clear status register as soon as we read it */ + zynqmp_dp_write(dp, ZYNQMP_DP_INT_STATUS, status); mask = zynqmp_dp_read(dp, ZYNQMP_DP_INT_MASK); if (!(status & ~mask)) return IRQ_NONE; @@ -1634,8 +1636,6 @@ static irqreturn_t zynqmp_dp_irq_handler(int irq, void *data) if (status & ZYNQMP_DP_INT_CHBUF_OVERFLW_MASK) dev_dbg_ratelimited(dp->dev, "overflow interrupt\n"); - zynqmp_dp_write(dp, ZYNQMP_DP_INT_STATUS, status); - if (status & ZYNQMP_DP_INT_VBLANK_START) zynqmp_dpsub_drm_handle_vblank(dp->dpsub); |