[PATCH] drm/panel: otm8009a: set clock to 29.70 Mhz

[PATCH] drm/panel: otm8009a: set clock to 29.70 Mhz

[Yannick Fertré]

The panel does not support clock frequency over 30.74 Mhz.
The clock rate has been reduced to 29.70 Mhz & new timings have
been computed to get a framerate of 50fps.

Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
---
 drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
index 87fa316..f715bbe 100644
--- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
+++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
@@ -67,15 +67,15 @@ struct otm8009a {
 };
 
 static const struct drm_display_mode default_mode = {
-	.clock = 32729,
+	.clock = 29700,
 	.hdisplay = 480,
-	.hsync_start = 480 + 120,
-	.hsync_end = 480 + 120 + 63,
-	.htotal = 480 + 120 + 63 + 120,
+	.hsync_start = 480 + 98,
+	.hsync_end = 480 + 98 + 32,
+	.htotal = 480 + 98 + 32 + 98,
 	.vdisplay = 800,
-	.vsync_start = 800 + 12,
-	.vsync_end = 800 + 12 + 12,
-	.vtotal = 800 + 12 + 12 + 12,
+	.vsync_start = 800 + 15,
+	.vsync_end = 800 + 15 + 10,
+	.vtotal = 800 + 15 + 10 + 14,
 	.vrefresh = 50,
 	.flags = 0,
 	.width_mm = 52,
-- 
2.7.4

Re: [PATCH] drm/panel: otm8009a: set clock to 29.70 Mhz

[Philippe CORNU]

Dear Yannick,
Many thanks for your patch.

Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Philippe Cornu <philippe.cornu@st.com>

Philippe :-)


On 3/21/19 9:07 AM, Yannick Fertré wrote:
> The panel does not support clock frequency over 30.74 Mhz.
> The clock rate has been reduced to 29.70 Mhz & new timings have
> been computed to get a framerate of 50fps.
> 
> Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
> ---
>   drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 14 +++++++-------
>   1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
> index 87fa316..f715bbe 100644
> --- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
> +++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
> @@ -67,15 +67,15 @@ struct otm8009a {
>   };
>   
>   static const struct drm_display_mode default_mode = {
> -	.clock = 32729,
> +	.clock = 29700,
>   	.hdisplay = 480,
> -	.hsync_start = 480 + 120,
> -	.hsync_end = 480 + 120 + 63,
> -	.htotal = 480 + 120 + 63 + 120,
> +	.hsync_start = 480 + 98,
> +	.hsync_end = 480 + 98 + 32,
> +	.htotal = 480 + 98 + 32 + 98,
>   	.vdisplay = 800,
> -	.vsync_start = 800 + 12,
> -	.vsync_end = 800 + 12 + 12,
> -	.vtotal = 800 + 12 + 12 + 12,
> +	.vsync_start = 800 + 15,
> +	.vsync_end = 800 + 15 + 10,
> +	.vtotal = 800 + 15 + 10 + 14,
>   	.vrefresh = 50,
>   	.flags = 0,
>   	.width_mm = 52,
> 

Re: [PATCH] drm/panel: otm8009a: set clock to 29.70 Mhz

[Thierry Reding]

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On Thu, Mar 21, 2019 at 09:07:26AM +0100, Yannick Fertré wrote:
> The panel does not support clock frequency over 30.74 Mhz.
> The clock rate has been reduced to 29.70 Mhz & new timings have
> been computed to get a framerate of 50fps.
> 
> Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
> ---
>  drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)

Applied, thanks.

Thierry

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