[Intel-gfx] [PATCH resend 14/15] drm/i915/dsi: Call MIPI_SEQ_TEAR_ON and DISPLAY_ON for cmd-mode (untested)

[Bob Paauwe]

On Sat, 25 Feb 2017 11:47:32 +0100
Hans de Goede <hdegoede at redhat.com> wrote:

> Hi,
> 
> On 24-02-17 18:02, Bob Paauwe wrote:
> > On Mon, 20 Feb 2017 15:08:44 +0100
> > Hans de Goede <hdegoede at redhat.com> wrote:
> >  
> >> According to the spec we should call MIPI_SEQ_TEAR_ON and DISPLAY_ON
> >> on enable for cmd-mode, just like we already call their counterparts
> >> on disable. Note: untested, my panel is a vid-mode panel.
> >>
> >> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> >> ---
> >>  drivers/gpu/drm/i915/intel_dsi.c | 2 ++
> >>  1 file changed, 2 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
> >> index 90263d6..a001e43 100644
> >> --- a/drivers/gpu/drm/i915/intel_dsi.c
> >> +++ b/drivers/gpu/drm/i915/intel_dsi.c
> >> @@ -680,6 +680,8 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder,
> >>  	if (is_cmd_mode(intel_dsi)) {
> >>  		for_each_dsi_port(port, intel_dsi->ports)
> >>  			I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(port), 8 * 4);
> >> +		intel_dsi_exec_vbt_sequence(intel_dsi, MIPI_SEQ_TEAR_ON);  
> >
> > As with the TEAR_OFF, should this only be done for command mode?  Or is
> > it just a no-op for video mode and doesn't matter?  
> 
> In this case we are actually in a "if (is_cmd_mode(intel_dsi)) {" code
> block (the if is visible in the diff context).
> 
> Which I guess also shows that we really need to add the guard to the
> other path, so as to be consistent.
> 
> Note as mentioned in the commit msg:
> 
> untested, my panel is a vid-mode panel.

Oops, sorry.  I think there's another block of code somewhere that
looks almost like this but was wrapped in an if (is_vid_mode) condition
and I confused the two.

So disregard my comment and add:

Reviewed-by: Bob Paauwe <bob.j.paauwe at intel.com>

> 
> >  
> >> +		intel_dsi_exec_vbt_sequence(intel_dsi, MIPI_SEQ_DISPLAY_ON);
> >>  	} else {
> >>  		msleep(20); /* XXX */
> >>  		for_each_dsi_port(port, intel_dsi->ports)  
> >
> >
> >  
> 
> Regards,
> 
> Hans



-- 
--
Bob Paauwe                  
Bob.J.Paauwe at intel.com
IOTG / PED Software Organization
Intel Corp.  Folsom, CA
(916) 356-6193