From: Jagan Teki <jagan@amarulasolutions.com>
To: Maxime Ripard <maxime.ripard@bootlin.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Chen-Yu Tsai <wens@csie.org>
Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
Jagan Teki <jagan@amarulasolutions.com>,
Michael Trimarchi <michael@amarulasolutions.com>,
linux-amarula@amarulasolutions.com,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 03/10] drm/sun4i: sun6i_mipi_dsi: Setup burst mode timings
Date: Fri, 15 Feb 2019 01:02:30 +0530 [thread overview]
Message-ID: <20190214193236.7504-4-jagan@amarulasolutions.com> (raw)
In-Reply-To: <20190214193236.7504-1-jagan@amarulasolutions.com>
Burst mode display timings are different from conventional video mode.
For burst mode most of the timings hsa, hbp, hfp, vblk are 0 and hblk
is computed as (mode->hdisplay * Bpp)
This patch simply add burst mode timings without touching existing mode
timings.
Reference code taken from BSP (from linux-sunxi/
drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c)
dsi_hsa = 0;
dsi_hbp = 0;
dsi_hact = x*dsi_pixel_bits[format]/8;
dsi_hblk = dsi_hact;
dsi_hfp = 0;
dsi_vblk = 0;
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Merlijn Wajer <merlijn@wizzup.org>
---
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index 1a0707468121..4362d9df1da6 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -516,6 +516,12 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi,
/* Do all timing calculations up front to allocate buffer space */
+ if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) {
+ hbp = hfp = hsa = vblk = 0;
+ hblk = (mode->hdisplay * Bpp);
+ goto alloc_buf;
+ }
+
/*
* A sync period is composed of a blanking packet (4 bytes +
* payload + 2 bytes) and a sync event packet (4 bytes). Its
@@ -554,6 +560,7 @@ static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi,
vblk = sun6i_dsi_get_timings_vblk(dsi, mode, hblk);
+alloc_buf:
/* How many bytes do we need to send all payloads? */
bytes = max_t(size_t, max(max(hfp, hblk), max(hsa, hbp)), vblk);
buffer = kmalloc(bytes, GFP_KERNEL);
--
2.18.0.321.gffc6fa0e3
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next prev parent reply other threads:[~2019-02-14 19:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-14 19:32 [PATCH v8 00/10] drm/sun4i: Allwinner MIPI-DSI Burst mode support Jagan Teki
2019-02-14 19:32 ` [PATCH v8 01/10] drm/sun4i: sun6i_mipi_dsi: Compute burst mode loop N1 instruction delay Jagan Teki
2019-02-14 19:32 ` [PATCH v8 02/10] drm/sun4i: sun6i_mipi_dsi: Support instruction loop selection Jagan Teki
2019-02-14 19:32 ` Jagan Teki [this message]
2019-02-14 19:32 ` [PATCH v8 04/10] drm/sun4i: sun6i_mipi_dsi: Fix TCON DRQ set bits Jagan Teki
2019-02-14 19:32 ` [PATCH v8 05/10] drm/sun4i: sun6i_mipi_dsi: Simplify drq to support all modes Jagan Teki
2019-02-14 19:32 ` [PATCH v8 06/10] drm/sun4i: tcon: Export get tcon0 routine Jagan Teki
2019-02-14 19:32 ` [PATCH v8 07/10] drm/sun4i: sun6i_mipi_dsi: Probe tcon0 during dsi_bind Jagan Teki
2019-02-14 19:32 ` [PATCH v8 08/10] drm/sun4i: sun6i_mipi_dsi: Setup burst mode Jagan Teki
2019-02-14 19:32 ` [PATCH v8 09/10] drm/sun4i: sun6i_mipi_dsi: Enable trail_inv and trail_fill controls Jagan Teki
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