linux-kernel - [PATCH 02/10] drm/sun4i: sun6i_mipi_dsi: Support instruction loop selection

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Date:   Sat,  3 Nov 2018 15:38:52 +0530
From:   Jagan Teki <jagan@...rulasolutions.com>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Icenowy Zheng <icenowy@...c.io>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Michael Trimarchi <michael@...rulasolutions.com>,
        TL Lim <tllim@...e64.org>, linux-sunxi@...glegroups.com
Cc:     Jagan Teki <jagan@...rulasolutions.com>
Subject: [PATCH 02/10] drm/sun4i: sun6i_mipi_dsi: Support instruction loop selection

Instruction loop selection would require before writing
loop number registers, so enable idle, LP11 bits on
loop selection register.

Reference code available in BSP
(in drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c)
(dsi_dev[sel]->dsi_inst_loop_sel.dwval = 2<<(4*DSI_INST_ID_LP11) |
	3<<(4*DSI_INST_ID_DLY);

Signed-off-by: Jagan Teki <jagan@...rulasolutions.com>
---
 drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index da152c21ec62..077b57ec964c 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -397,6 +397,10 @@ static void sun6i_dsi_setup_inst_loop(struct sun6i_dsi *dsi,
 	struct mipi_dsi_device *device = dsi->device;
 	u16 delay;
 
+	regmap_write(dsi->regs, SUN6I_DSI_INST_LOOP_SEL_REG,
+		     DSI_INST_ID_HSC  << (4 * DSI_INST_ID_LP11) |
+		     DSI_INST_ID_HSD  << (4 * DSI_INST_ID_DLY));
+
 	if (device->mode_flags == MIPI_DSI_MODE_VIDEO_BURST)
 		delay = (((mode->htotal - mode->hdisplay) * 150) /
 			((mode->clock / 1000) * 8)) - 50;
-- 
2.18.0.321.gffc6fa0e3