From: Jagan Teki <jagan@amarulasolutions.com>
To: Maxime Ripard <maxime.ripard@bootlin.com>,
Chen-Yu Tsai <wens@csie.org>, Icenowy Zheng <icenowy@aosc.io>,
Jernej Skrabec <jernej.skrabec@siol.net>,
Vasily Khoruzhick <anarsoul@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>,
linux-clk@vger.kernel.org,
Michael Trimarchi <michael@amarulasolutions.com>,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com,
linux-amarula@amarulasolutions.com
Cc: Jagan Teki <jagan@amarulasolutions.com>
Subject: [PATCH v4 10/26] drm/sun4i: sun6i_mipi_dsi: Refactor vertical video start delay
Date: Tue, 13 Nov 2018 16:46:17 +0530 [thread overview]
Message-ID: <20181113111633.20189-11-jagan@amarulasolutions.com> (raw)
In-Reply-To: <20181113111633.20189-1-jagan@amarulasolutions.com>
Video start delay can be computed by subtracting total vertical
timing with front porch timing and with adding 1 delay line for TCON.
BSP code form BPI-M64-bsp is computing video start delay as
(from linux-sunxi/
drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c)
u32 vfp = panel->lcd_vt - panel->lcd_y - panel->lcd_vbp;
=> (panel->lcd_vt) - panel->lcd_y - (panel->lcd_vbp)
=> (timmings->ver_front_porch + panel->lcd_vbp + panel->lcd_y)
- panel->lcd_y - (panel->lcd_vbp)
=> timmings->ver_front_porch + panel->lcd_vbp + panel->lcd_y
- panel->lcd_y - panel->lcd_vbp
=> timmings->ver_front_porch
So, update the start delay computation accordingly.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index fc4252d96c38..f6e3df8d2490 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -358,7 +358,17 @@ static void sun6i_dsi_inst_init(struct sun6i_dsi *dsi,
static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi,
struct drm_display_mode *mode)
{
- return mode->vtotal - (mode->vsync_end - mode->vdisplay) + 1;
+ u32 vfp = mode->vsync_start - mode->vdisplay;
+ u32 start_delay;
+
+ start_delay = mode->vtotal - vfp + 1;
+ if (start_delay > mode->vtotal)
+ start_delay -= mode->vtotal;
+
+ if (!start_delay)
+ start_delay = 1;
+
+ return start_delay;
}
static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi,
--
2.18.0.321.gffc6fa0e3
next prev parent reply other threads:[~2018-11-13 11:17 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-13 11:16 [PATCH v4 00/26] drm/sun4i: Allwinner A64 MIPI-DSI support Jagan Teki
2018-11-13 11:16 ` [PATCH v4 01/26] clk: sunxi-ng: a64: Fix gate bit of DSI DPHY Jagan Teki
2018-11-13 13:08 ` Maxime Ripard
2018-11-13 11:16 ` [PATCH v4 02/26] clk: sunxi-ng: Add check for minimal rate to NKM PLLs Jagan Teki
2018-11-13 11:16 ` [PATCH v4 03/26] clk: sunxi-ng: Add check for maximum " Jagan Teki
2018-11-13 13:26 ` Maxime Ripard
2018-11-15 15:21 ` Jagan Teki
2018-11-20 10:55 ` Maxime Ripard
2018-11-20 12:07 ` Jagan Teki
2018-11-13 11:16 ` [PATCH v4 04/26] drm/sun4i: sun6i_mipi_dsi: Add has_mod_clk quirk Jagan Teki
2018-11-13 11:16 ` [PATCH v4 05/26] drm/sun4i: sun6i_mipi_dsi: Add Allwinner A64 MIPI DSI support Jagan Teki
2018-11-13 11:16 ` [PATCH v4 06/26] dt-bindings: sun6i-dsi: Add compatible for A64 MIPI DSI Jagan Teki
2018-11-13 11:16 ` [PATCH v4 07/26] drm/sun4i: sun6i_mipi_dsi: Add DSI Generic short write 2 param transfer Jagan Teki
2018-11-13 11:16 ` [PATCH v4 08/26] drm/sun4i: sun6i_mipi_dsi: Fix VBP size calculation Jagan Teki
2018-11-15 9:55 ` Maxime Ripard
2018-11-15 17:49 ` Jagan Teki
2018-11-20 15:57 ` Maxime Ripard
2018-11-20 16:25 ` Jagan Teki
2018-11-26 12:07 ` [linux-sunxi] " Jagan Teki
2018-11-27 10:25 ` Maxime Ripard
2018-11-27 10:24 ` Maxime Ripard
2018-11-27 11:04 ` [linux-sunxi] " Jagan Teki
2018-12-07 13:21 ` Maxime Ripard
2018-12-10 16:07 ` Jagan Teki
2018-11-13 11:16 ` [PATCH v4 09/26] drm/sun4i: sun6i_mipi_dsi: Fix TCON DRQ set bits Jagan Teki
2018-11-13 11:16 ` Jagan Teki [this message]
2018-11-13 11:16 ` [PATCH v4 11/26] drm/sun4i: sun6i_mipi_dsi: Fix DSI hbp timing value Jagan Teki
2018-11-13 11:16 ` [PATCH v4 12/26] drm/sun4i: sun6i_mipi_dsi: Fix DSI hblk timing calculation Jagan Teki
2018-11-13 11:16 ` [PATCH v4 13/26] drm/sun4i: sun6i_mipi_dsi: Add DSI hblk packet overhead Jagan Teki
2018-11-13 11:16 ` [PATCH v4 14/26] drm/sun4i: sun6i_mipi_dsi: Fix DSI hfp timing value Jagan Teki
2018-11-13 11:16 ` [PATCH v4 15/26] drm/sun4i: sun6i_mipi_dsi: Set proper vblk timing calculation Jagan Teki
2018-11-13 11:16 ` [PATCH v4 16/26] drm/sun4i: sun6i_mipi_dsi: Add support for VCC-DSI voltage regulator Jagan Teki
2018-11-13 11:16 ` [PATCH v4 17/26] dt-bindings: sun6i-dsi: Add VCC-DSI supply property Jagan Teki
2018-11-16 23:19 ` Rob Herring
2018-11-13 11:16 ` [PATCH v4 18/26] dt-bindings: panel: Add Bananapi S070WV20-CT16 ICN6211 MIPI-DSI to RGB bridge Jagan Teki
2018-11-13 11:16 ` [PATCH v4 19/26] drm/panel: " Jagan Teki
2018-11-13 11:16 ` [PATCH v4 20/26] dt-bindings: panel: Add Techstar TS8550B MIPI-DSI panel Jagan Teki
2018-11-13 11:16 ` [PATCH v4 21/26] drm/panel: Add Techstar TS8550B MIPI-DSI LCD panel Jagan Teki
2018-11-13 11:16 ` [PATCH v4 22/26] clk: sunxi-ng: a64: Add min and max rate for PLL_MIPI Jagan Teki
2018-11-13 11:16 ` [PATCH v4 23/26] dt-bindings: sun6i-dsi: Add compatible for A64 DPHY Jagan Teki
2018-11-13 11:16 ` [PATCH v4 24/26] arm64: dts: allwinner: a64: Add DSI pipeline Jagan Teki
2018-11-13 11:16 ` [PATCH v4 25/26] [DO NOT MERGE] arm64: dts: allwinner: bananapi-m64: Bananapi S070WV20-CT16 DSI panel Jagan Teki
2018-11-13 12:22 ` Andre Przywara
2018-11-14 6:31 ` Jagan Teki
2018-11-14 6:58 ` Chen-Yu Tsai
2018-11-14 9:22 ` Chen-Yu Tsai
2018-11-14 11:18 ` Jagan Teki
2018-11-13 11:16 ` [PATCH v4 26/26] arm64: dts: allwinner: a64-amarula-relic: Enable Techstar TS8550B MIPI-DSI panel Jagan Teki
2018-11-13 12:32 ` Andre Przywara
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