From mboxrd@z Thu Jan  1 00:00:00 1970
From: ssuloev@orpaltech.com (Sergey Suloev)
Date: Sat, 3 Nov 2018 18:23:20 +0300
Subject: [PATCH 01/10] drm/sun4i: sun6i_mipi_dsi: Compute burst mode loop
 N1 instruction delay
In-Reply-To: <20181103100900.30313-2-jagan@amarulasolutions.com>
References: <20181103100900.30313-1-jagan@amarulasolutions.com>
 <20181103100900.30313-2-jagan@amarulasolutions.com>
Message-ID: <8365df14-3397-b395-48eb-3070da3b65fc@orpaltech.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi, Jagan,

On 11/3/18 1:08 PM, Jagan Teki wrote:
> Loop N1 instruction delay for burst mode lcd panel are
> computed as per BSP code.
>
> Reference code is available in BSP
> (in 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 | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
> index 86430efd9054..da152c21ec62 100644
> --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
> +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
> @@ -394,7 +394,14 @@ 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;
> +	struct mipi_dsi_device *device = dsi->device;
> +	u16 delay;
> +
> +	if (device->mode_flags == MIPI_DSI_MODE_VIDEO_BURST)
> +		delay = (((mode->htotal - mode->hdisplay) * 150) /
> +			((mode->clock / 1000) * 8)) - 50;
> +	else
> +		delay = 50 - 1;
>   
>   	regmap_write(dsi->regs, SUN6I_DSI_INST_LOOP_NUM_REG(0),
>   		     SUN6I_DSI_INST_LOOP_NUM_N0(50 - 1) |


is this patch series comes in addition to the previous MIPI DSI series 
or in its stead?

Thanks