[PATCH] drm/panel: update innolux n116bge timings

[PATCH] drm/panel: update innolux n116bge timings

[Daniel Kurtz]

There are several different models of N116BGE.  According to the commit
that added innolux_n116bge_mode [0], this N116BGE is for the eDP variety.

[0] commit 0a2288c06aab73c966e82045c8f20b0e713baf2a
 Author: Thierry Reding <treding@nvidia.com>
 Date:   Thu Jul 3 14:02:59 2014 +0200

   drm/panel: simple: Add Innolux N116BGE panel support

The clock and htotal values from add by that patch are out of spec according to
the datasheets I have seen for the eDP N116BGE (-EA2 and -EB2).

This patch changes the values to the "Typ" values on the datasheet.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
---

Thierry,

It is possible that your timings were correct for the panel you are using on
the norrin reference board.  In that case I'm happy to upload a new patch
that creates a new panel entry.  However, I'm pretty sure we are using the
same N116BGE.

 drivers/gpu/drm/panel/panel-simple.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
index 4ce1db0..776764a 100644
--- a/drivers/gpu/drm/panel/panel-simple.c
+++ b/drivers/gpu/drm/panel/panel-simple.c
@@ -519,15 +519,15 @@ static const struct panel_desc foxlink_fl500wvr00_a0t = {
 };
 
 static const struct drm_display_mode innolux_n116bge_mode = {
-	.clock = 71000,
+	.clock = 76420,
 	.hdisplay = 1366,
-	.hsync_start = 1366 + 64,
-	.hsync_end = 1366 + 64 + 6,
-	.htotal = 1366 + 64 + 6 + 64,
+	.hsync_start = 1366 + 136,
+	.hsync_end = 1366 + 136 + 30,
+	.htotal = 1366 + 136 + 30 + 60,
 	.vdisplay = 768,
 	.vsync_start = 768 + 8,
-	.vsync_end = 768 + 8 + 4,
-	.vtotal = 768 + 8 + 4 + 8,
+	.vsync_end = 768 + 8 + 12,
+	.vtotal = 768 + 8 + 12 + 12,
 	.vrefresh = 60,
 	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
 };
-- 
2.1.0.rc2.206.gedb03e5

Re: [PATCH] drm/panel: update innolux n116bge timings

[Daniel Kurtz]

Hi Thierry,

Congratulations!  I saw in one thread that you said you are out on
paternity leave.

You mentioned that you would be back around v3.17-rc6, which should be
soonish, so just a gentle ping on this patch for when you return.

Thanks,
-Daniel

Re: [PATCH] drm/panel: update innolux n116bge timings

[Thierry Reding]

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On Sun, Sep 21, 2014 at 03:53:51PM +0800, Daniel Kurtz wrote:
> Hi Thierry,
> 
> Congratulations!  I saw in one thread that you said you are out on
> paternity leave.

Thanks.

> You mentioned that you would be back around v3.17-rc6, which should be
> soonish, so just a gentle ping on this patch for when you return.

I'm back to work starting today but catching up on a lot of email, so
it might take me a little to get to the bottom of this.

Thierry

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Re: [PATCH] drm/panel: update innolux n116bge timings

[Thierry Reding]

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On Tue, Sep 02, 2014 at 10:56:46AM +0800, Daniel Kurtz wrote:
> There are several different models of N116BGE.  According to the commit
> that added innolux_n116bge_mode [0], this N116BGE is for the eDP variety.
> 
> [0] commit 0a2288c06aab73c966e82045c8f20b0e713baf2a
>  Author: Thierry Reding <treding@nvidia.com>
>  Date:   Thu Jul 3 14:02:59 2014 +0200
> 
>    drm/panel: simple: Add Innolux N116BGE panel support
> 
> The clock and htotal values from add by that patch are out of spec according to
> the datasheets I have seen for the eDP N116BGE (-EA2 and -EB2).

Does out of spec imply that these timings aren't working for you?

> This patch changes the values to the "Typ" values on the datasheet.

The original patch was based on -E42 of the datasheet. But I can run
some tests to see if the timings in this patch work on the panel that I
have. If so I guess the easiest would be to apply this.

It shouldn't matter all that much since the panel has EDID if I remember
correctly. The modes parsed from EDID should take precedence over the
fixed mode. If they don't then that's a bug.

Thierry

> 
> Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
> ---
> 
> Thierry,
> 
> It is possible that your timings were correct for the panel you are using on
> the norrin reference board.  In that case I'm happy to upload a new patch
> that creates a new panel entry.  However, I'm pretty sure we are using the
> same N116BGE.
> 
>  drivers/gpu/drm/panel/panel-simple.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index 4ce1db0..776764a 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -519,15 +519,15 @@ static const struct panel_desc foxlink_fl500wvr00_a0t = {
>  };
>  
>  static const struct drm_display_mode innolux_n116bge_mode = {
> -	.clock = 71000,
> +	.clock = 76420,
>  	.hdisplay = 1366,
> -	.hsync_start = 1366 + 64,
> -	.hsync_end = 1366 + 64 + 6,
> -	.htotal = 1366 + 64 + 6 + 64,
> +	.hsync_start = 1366 + 136,
> +	.hsync_end = 1366 + 136 + 30,
> +	.htotal = 1366 + 136 + 30 + 60,
>  	.vdisplay = 768,
>  	.vsync_start = 768 + 8,
> -	.vsync_end = 768 + 8 + 4,
> -	.vtotal = 768 + 8 + 4 + 8,
> +	.vsync_end = 768 + 8 + 12,
> +	.vtotal = 768 + 8 + 12 + 12,
>  	.vrefresh = 60,
>  	.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
>  };
> -- 
> 2.1.0.rc2.206.gedb03e5
> 

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Re: [PATCH] drm/panel: update innolux n116bge timings

[Daniel Kurtz]

On Mon, Sep 22, 2014 at 4:39 PM, Thierry Reding
<thierry.reding@gmail.com> wrote:
>
> On Tue, Sep 02, 2014 at 10:56:46AM +0800, Daniel Kurtz wrote:
> > There are several different models of N116BGE.  According to the commit
> > that added innolux_n116bge_mode [0], this N116BGE is for the eDP variety.
> >
> > [0] commit 0a2288c06aab73c966e82045c8f20b0e713baf2a
> >  Author: Thierry Reding <treding@nvidia.com>
> >  Date:   Thu Jul 3 14:02:59 2014 +0200
> >
> >    drm/panel: simple: Add Innolux N116BGE panel support
> >
> > The clock and htotal values from add by that patch are out of spec according to
> > the datasheets I have seen for the eDP N116BGE (-EA2 and -EB2).
>
> Does out of spec imply that these timings aren't working for you?

No, I didn't even try with your values, actually.
Out of spec just means that the numbers do not fall between Min and
Max on the datasheet:

72.6 <= DCLK <= 80.24 vs. 71
1506 <= htotal <= 1716 vs. 1500

> > This patch changes the values to the "Typ" values on the datasheet.
>
> The original patch was based on -E42 of the datasheet. But I can run
> some tests to see if the timings in this patch work on the panel that I
> have. If so I guess the easiest would be to apply this.

Thanks!

>
> It shouldn't matter all that much since the panel has EDID if I remember
> correctly. The modes parsed from EDID should take precedence over the
> fixed mode. If they don't then that's a bug.

The driver I am testing this with does not yet support reading the
EDID over eDP, so I am using the fixed values for now.

> Thierry
>

Re: [PATCH] drm/panel: update innolux n116bge timings

[Thierry Reding]

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On Mon, Sep 22, 2014 at 06:12:41PM +0800, Daniel Kurtz wrote:
> On Mon, Sep 22, 2014 at 4:39 PM, Thierry Reding <thierry.reding@gmail.com> wrote:
> > It shouldn't matter all that much since the panel has EDID if I remember
> > correctly. The modes parsed from EDID should take precedence over the
> > fixed mode. If they don't then that's a bug.
> 
> The driver I am testing this with does not yet support reading the
> EDID over eDP, so I am using the fixed values for now.

Ew... you should get a better driver, then. =)

Thierry

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Re: [PATCH] drm/panel: update innolux n116bge timings

[Thierry Reding]

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On Mon, Sep 22, 2014 at 06:12:41PM +0800, Daniel Kurtz wrote:
> On Mon, Sep 22, 2014 at 4:39 PM, Thierry Reding
> <thierry.reding@gmail.com> wrote:
> >
> > On Tue, Sep 02, 2014 at 10:56:46AM +0800, Daniel Kurtz wrote:
> > > There are several different models of N116BGE.  According to the commit
> > > that added innolux_n116bge_mode [0], this N116BGE is for the eDP variety.
> > >
> > > [0] commit 0a2288c06aab73c966e82045c8f20b0e713baf2a
> > >  Author: Thierry Reding <treding@nvidia.com>
> > >  Date:   Thu Jul 3 14:02:59 2014 +0200
> > >
> > >    drm/panel: simple: Add Innolux N116BGE panel support
> > >
> > > The clock and htotal values from add by that patch are out of spec according to
> > > the datasheets I have seen for the eDP N116BGE (-EA2 and -EB2).
> >
> > Does out of spec imply that these timings aren't working for you?
> 
> No, I didn't even try with your values, actually.
> Out of spec just means that the numbers do not fall between Min and
> Max on the datasheet:
> 
> 72.6 <= DCLK <= 80.24 vs. 71
> 1506 <= htotal <= 1716 vs. 1500
> 
> > > This patch changes the values to the "Typ" values on the datasheet.
> >
> > The original patch was based on -E42 of the datasheet. But I can run
> > some tests to see if the timings in this patch work on the panel that I
> > have. If so I guess the easiest would be to apply this.
> 
> Thanks!

Took me a while longer to test this than I had expected. Turns out the
Tegra132 Norrin board that I have works with the timings you provide in
this patch too, so I'm going to apply this patch.

Thierry

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