> -----Original Message-----
> From: Nikula, Jani
> Sent: Monday, July 2, 2018 3:27 PM
> To: Chauhan, Madhav <madhav.chauhan@xxxxxxxxx>; intel-
> gfx@xxxxxxxxxxxxxxxxxxxxx
> Cc: Zanoni, Paulo R <paulo.r.zanoni@xxxxxxxxx>; Shankar, Uma
> <uma.shankar@xxxxxxxxx>; Vivi, Rodrigo <rodrigo.vivi@xxxxxxxxx>;
> Chauhan, Madhav <madhav.chauhan@xxxxxxxxx>
> Subject: Re: [PATCH 04/20] drm/i915/icl: Enable DSI IO power
>
> On Fri, 15 Jun 2018, Madhav Chauhan <madhav.chauhan@xxxxxxxxx> wrote:
> > This patch configures mode of operation for DSI and enable DDI IO
> > power by configuring power well.
> >
> > Signed-off-by: Madhav Chauhan <madhav.chauhan@xxxxxxxxx>
> > ---
> > drivers/gpu/drm/i915/intel_dsi_new.c | 22 ++++++++++++++++++++++
> > 1 file changed, 22 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/intel_dsi_new.c
> > b/drivers/gpu/drm/i915/intel_dsi_new.c
> > index 0d325ca..5ec4016 100644
> > --- a/drivers/gpu/drm/i915/intel_dsi_new.c
> > +++ b/drivers/gpu/drm/i915/intel_dsi_new.c
> > @@ -55,11 +55,33 @@ static void gen11_dsi_program_esc_clk_div(struct
> intel_encoder *encoder)
> > }
> > }
> >
> > +static void gen11_dsi_enable_io_power(struct intel_encoder *encoder)
> > +{
> > + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> > + struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
> > + enum port port;
> > + u32 tmp;
> > +
> > + for_each_dsi_port(port, intel_dsi->ports) {
> > + tmp = I915_READ(ICL_DSI_IO_MODECTL(port));
> > + tmp |= COMBO_PHY_MODE_DSI;
> > + I915_WRITE(ICL_DSI_IO_MODECTL(port), tmp);
> > + }
> > +
> > + intel_display_power_get(dev_priv,
> POWER_DOMAIN_PORT_DDI_A_IO);
> > +
> > + if (intel_dsi->dual_link)
> > + intel_display_power_get(dev_priv,
> POWER_DOMAIN_PORT_DDI_B_IO);
>
> Per bspec, "DSI0 uses DDI A; DSI1 uses DDI B" so shouldn't this be a
> for_each_dsi_port() too, with the appropriate mapping to power domain?
Do you mean something like this:
enum intel_display_power_domain power_domain;
for_each_dsi_port()
{
if (port ==PORT_A)
power_domain = POWER_DOMAIN_PORT_DDI_A_IO;
else if( port == PORT_B)
power_domain = POWER_DOMAIN_PORT_DDI_A_IO;
intel_display_power_get(dev_priv, power_domain);
}
>
> > +}
> > +
> > static void __attribute__((unused)) gen11_dsi_pre_enable(
> > struct intel_encoder *encoder,
> > const struct intel_crtc_state *pipe_config,
> > const struct drm_connector_state
> *conn_state)
>
> Please don't end lines in (. You can add a newline before the function
> name:
>
> static void __attribute__((unused))
> gen11_dsi_pre_enable(struct intel_encoder *encoder,
> const struct intel_crtc_state *pipe_config,
> const struct drm_connector_state *conn_state)
>
Got it. Thanks!!
Regards,
Madhav
> > {
> > + /* step2: enable IO power */
> > + gen11_dsi_enable_io_power(encoder);
> > +
> > /* step3: enable DSI PLL */
> > gen11_dsi_program_esc_clk_div(encoder);
> > }
>
> --
> Jani Nikula, Intel Open Source Graphics Center
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