From 7717fc5b22e59975c88a8f2b222b5cee4531de61 Mon Sep 17 00:00:00 2001 From: Anatoliy Klymenko Date: Tue, 23 Jan 2024 18:54:00 -0800 Subject: [PATCH] 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 Reviewed-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart Signed-off-by: Tomi Valkeinen Link: https://patchwork.freedesktop.org/patch/msgid/20240124025402.373620-4-anatoliy.klymenko@amd.com --- drivers/gpu/drm/xlnx/zynqmp_dp.c | 4 ++-- 1 file 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); -- 2.39.5