From: Maxime Ripard <maxime.ripard@bootlin.com>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Sean Paul <seanpaul@chromium.org>,
Maxime Ripard <maxime.ripard@bootlin.com>
Cc: bbrezillon@kernel.org, dri-devel@lists.freedesktop.org,
Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
Chen-Yu Tsai <wens@csie.org>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Jagan Teki <jagan@openedev.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 3/8] drm/sun4i: dsi: Enforce boundaries on the start delay
Date: Mon, 11 Feb 2019 15:41:24 +0100 [thread overview]
Message-ID: <c9889cf5f7a3d101ef380905900b45a182596f56.1549896081.git-series.maxime.ripard@bootlin.com> (raw)
In-Reply-To: <cover.f28d9994585553a089a519392616b0d26ed54af1.1549896081.git-series.maxime.ripard@bootlin.com>
The Allwinner BSP makes sure that we don't end up with a null start delay
or with a delay larger than vtotal.
The former condition is likely to happen now with the reworked start delay,
so make sure we enforce the same boundaries.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
---
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index 9471fa695ec7..506f2e8cf454 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -358,8 +358,12 @@ static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi,
struct drm_display_mode *mode)
{
u16 start = clamp(mode->vtotal - mode->vdisplay - 10, 8, 100);
+ u16 delay = mode->vtotal - (mode->vsync_end - mode->vdisplay) + start;
- return mode->vtotal - (mode->vsync_end - mode->vdisplay) + start;
+ if (delay > mode->vtotal)
+ delay = delay % mode->vtotal;
+
+ return max_t(u16, delay, 1);
}
static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi,
--
git-series 0.9.1
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next prev parent reply other threads:[~2019-02-11 14:43 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-11 14:41 [PATCH v3 0/8] drm/sun4i: dsi: Add burst mode support Maxime Ripard
2019-02-11 14:41 ` [PATCH v3 1/8] drm/sun4i: dsi: Restrict DSI tcon clock divider Maxime Ripard
2019-02-11 14:41 ` [PATCH v3 2/8] drm/sun4i: dsi: Change the start delay calculation Maxime Ripard
2019-02-12 15:28 ` Paul Kocialkowski
2019-02-12 15:45 ` Maxime Ripard
2019-02-11 14:41 ` Maxime Ripard [this message]
2019-02-12 15:30 ` [PATCH v3 3/8] drm/sun4i: dsi: Enforce boundaries on the start delay Paul Kocialkowski
2019-02-14 9:21 ` Maxime Ripard
2019-02-11 14:41 ` [PATCH v3 4/8] drm/sun4i: dsi: Fix front vs back porch calculation Maxime Ripard
2019-02-12 15:41 ` Paul Kocialkowski
2019-02-11 14:41 ` [PATCH v3 5/8] drm/sun4i: dsi: Fix DRQ calculation Maxime Ripard
2019-02-13 14:33 ` Paul Kocialkowski
2019-02-14 9:23 ` Maxime Ripard
2019-02-11 14:41 ` [PATCH v3 6/8] drm/sun4i: dsi: Rework a bit the hblk calculation Maxime Ripard
2019-02-13 14:41 ` Paul Kocialkowski
2019-02-11 14:41 ` [PATCH v3 7/8] drm/sun4i: dsi: Add burst support Maxime Ripard
2019-02-13 14:36 ` Paul Kocialkowski
2019-02-14 9:15 ` Maxime Ripard
2019-02-11 14:41 ` [PATCH v3 8/8] drm/panel: Add Ronbo RB070D30 panel Maxime Ripard
2019-02-11 15:13 ` Sam Ravnborg
2019-02-13 14:26 ` Paul Kocialkowski
2019-02-14 11:07 ` Re[2]: " Konstantin Sudakov
2019-02-12 10:32 ` [PATCH v3 0/8] drm/sun4i: dsi: Add burst mode support Jagan Teki
2019-02-15 14:12 ` Maxime Ripard
[not found] ` <CAMty3ZAA90-fHPADJSE3ht9CiYWA3yBoyEy7wVv9=6C5JiaTVw@mail.gmail.com>
2019-02-15 17:07 ` Jagan Teki
2019-02-18 8:26 ` Paul Kocialkowski
2019-02-18 10:31 ` Jagan Teki
2019-02-20 16:35 ` Maxime Ripard
2019-02-26 6:48 ` Jagan Teki
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