From: Jagan Teki <jagan@amarulasolutions.com>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
Rob Herring <robh+dt@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
Icenowy Zheng <icenowy@aosc.io>,
Jernej Skrabec <jernej.skrabec@siol.net>,
Vasily Khoruzhick <anarsoul@gmail.com>,
Thierry Reding <thierry.reding@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Michael Trimarchi <michael@amarulasolutions.com>,
TL Lim <tllim@pine64.org>,
linux-sunxi@googlegroups.com, linux-amarula@amarulasolutions.com
Cc: Jagan Teki <jagan@amarulasolutions.com>
Subject: [PATCH v2 01/12] drm/sun4i: sun6i_mipi_dsi: Compute burst mode loop N1 instruction delay
Date: Fri, 16 Nov 2018 22:09:05 +0530 [thread overview]
Message-ID: <20181116163916.29621-2-jagan@amarulasolutions.com> (raw)
In-Reply-To: <20181116163916.29621-1-jagan@amarulasolutions.com>
Loop N1 instruction delay for burst mode lcd panel are
computed as per BSP code.
Reference code is available in BSP (from linux-sunxi
drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c)
dsi_dev[sel]->dsi_inst_loop_num.bits.loop_n1=
(panel->lcd_ht-panel->lcd_x)*(150)/(panel->lcd_dclk_freq*8) - 50;
=> (((mode->htotal - mode->hdisplay) * 150) /
((mode->clock / 1000) * 8)) - 50;
So use the similar computation for loop N1 delay.
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 20 +++++++++++++++++++-
1 file changed, 19 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index def145086a5c..43ab7127d428 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -379,6 +379,24 @@ static u16 sun6i_dsi_get_timings_vblk(struct sun6i_dsi *dsi,
return vblk;
}
+static u16 sun6i_dsi_setup_inst_delay(struct sun6i_dsi *dsi,
+ struct drm_display_mode *mode)
+{
+ struct mipi_dsi_device *device = dsi->device;
+ u32 hsync_porch, dclk;
+ u16 delay;
+
+ hsync_porch = (mode->htotal - mode->hdisplay);
+ dclk = (mode->clock / 1000);
+
+ if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+ delay = ((hsync_porch * 150) / (dclk * 8)) - 50;
+ else
+ delay = 50 - 1;
+
+ return delay;
+}
+
static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi,
struct drm_display_mode *mode)
{
@@ -418,7 +436,7 @@ static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi,
static void sun6i_dsi_setup_inst_loop(struct sun6i_dsi *dsi,
struct drm_display_mode *mode)
{
- u16 delay = 50 - 1;
+ u16 delay = sun6i_dsi_setup_inst_delay(dsi, mode);
regmap_write(dsi->regs, SUN6I_DSI_INST_LOOP_NUM_REG(0),
SUN6I_DSI_INST_LOOP_NUM_N0(50 - 1) |
--
2.18.0.321.gffc6fa0e3
next prev parent reply other threads:[~2018-11-16 16:39 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-16 16:39 [PATCH v2 00/12] drm/sun4i: Allwinner MIPI-DSI Burst mode support Jagan Teki
2018-11-16 16:39 ` Jagan Teki [this message]
2018-11-19 8:27 ` [PATCH v2 01/12] drm/sun4i: sun6i_mipi_dsi: Compute burst mode loop N1 instruction delay Maxime Ripard
2018-11-19 10:58 ` Jagan Teki
2018-11-20 13:23 ` Maxime Ripard
2018-11-20 13:36 ` Jagan Teki
2018-11-20 15:58 ` Maxime Ripard
2018-11-20 16:01 ` Vasily Khoruzhick
2018-11-20 16:19 ` Jagan Teki
2018-11-16 16:39 ` [PATCH v2 02/12] drm/sun4i: sun6i_mipi_dsi: Support instruction loop selection Jagan Teki
2018-11-16 16:39 ` [PATCH v2 03/12] drm/sun4i: sun6i_mipi_dsi: Setup burst mode timings Jagan Teki
2018-11-19 8:30 ` Maxime Ripard
2018-11-19 11:00 ` Jagan Teki
2018-11-20 15:45 ` Maxime Ripard
2018-11-20 16:22 ` Jagan Teki
2018-11-27 10:07 ` Maxime Ripard
2018-11-16 16:39 ` [PATCH v2 04/12] drm/sun4i: sun6i_mipi_dsi: Simplify drq set to support all modes Jagan Teki
2018-11-19 8:32 ` Maxime Ripard
2018-11-19 11:22 ` Jagan Teki
2018-11-20 14:32 ` Maxime Ripard
2018-11-20 14:48 ` Jagan Teki
2018-11-16 16:39 ` [PATCH v2 05/12] drm/sun4i: tcon: Export get tcon0 routine Jagan Teki
2018-11-19 8:34 ` Maxime Ripard
2018-11-16 16:39 ` [PATCH v2 06/12] drm/sun4i: sun6i_mipi_dsi: Probe tcon0 during dsi_bind Jagan Teki
2018-11-19 8:38 ` Maxime Ripard
2018-11-19 11:36 ` Jagan Teki
2018-11-20 15:44 ` Maxime Ripard
2018-11-16 16:39 ` [PATCH v2 07/12] drm/sun4i: sun6i_mipi_dsi: Setup burst mode Jagan Teki
2018-11-16 16:39 ` [PATCH v2 08/12] drm/sun4i: sun6i_mipi_dsi: Enable 2byte trail for 4-lane " Jagan Teki
2018-11-16 16:39 ` [PATCH v2 09/12] drm/sun4i: sun6i_mipi_dsi: Enable burst mode HBP, HSA_HSE Jagan Teki
2018-11-16 16:39 ` [PATCH v2 10/12] dt-bindings: panel: Add Feiyang FY07024DI26A30-D MIPI-DSI LCD panel Jagan Teki
2018-11-16 16:39 ` [PATCH v2 11/12] drm/panel: " Jagan Teki
2018-12-10 16:12 ` Jagan Teki
2018-12-13 15:07 ` Sean Paul
2018-12-13 19:26 ` Jagan Teki
2018-12-13 19:55 ` Sean Paul
2018-12-14 11:05 ` Jagan Teki
2018-12-14 14:15 ` Sean Paul
2018-11-16 16:39 ` [PATCH v2 12/12][DO NOT MERGE] arm64: allwinner: a64: pine64-lts: Enable Feiyang FY07024DI26A30-D DSI panel Jagan Teki
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