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

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Date:   Mon, 5 Nov 2018 11:38:57 +0100
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Jagan Teki <jagan@...rulasolutions.com>
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.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
Subject: Re: [PATCH 02/10] drm/sun4i: sun6i_mipi_dsi: Support instruction
 loop selection

On Sat, Nov 03, 2018 at 03:38:52PM +0530, Jagan Teki wrote:
> 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));
> +

Please put this with the other instructions settings below.

hanks!
Maxime
 
-- 
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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