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SubjectRe: [PATCH 02/10] drm/sun4i: sun6i_mipi_dsi: Support instruction loop selection
On Mon, Nov 05, 2018 at 04:56:35PM +0530, Jagan Teki wrote:
> On Mon, Nov 5, 2018 at 4:09 PM Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> >
> > 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@amarulasolutions.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.
>
> Does that mean after computation delay code?

Yes

Maxime

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