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SubjectRe: [PATCH 1/2] drm/panel: Add Starry KR070PE2T
On 2020-03-10 19:54, Sam Ravnborg wrote:
> A few things to improve.
>
> The binding should be a separate patch.
> subject - shall start with dt-bindings:
> Shall be sent to deveicetree mailing list.

Hi Sam,

Thank you very much for your review.
I did consider this. The reason I combined the patches, is that the
binding depends on the display so I thought they were related in some
way. Didn't know the correct procedure to handle this. I will split them
apart in v2.

>> ---
>> .../display/panel/starry,kr070pe2t.txt | 7 +++++
>> drivers/gpu/drm/panel/panel-simple.c | 26
>> +++++++++++++++++++
>> 2 files changed, 33 insertions(+)
>> create mode 100644
>> Documentation/devicetree/bindings/display/panel/starry,kr070pe2t.txt
>>
>> diff --git
>> a/Documentation/devicetree/bindings/display/panel/starry,kr070pe2t.txt
>> b/Documentation/devicetree/bindings/display/panel/starry,kr070pe2t.txt
>> new file mode 100644
>> index 000000000..699ad5eb2
>> --- /dev/null
>> +++
>> b/Documentation/devicetree/bindings/display/panel/starry,kr070pe2t.txt
>> @@ -0,0 +1,7 @@
>> +Starry 7" (800x480 pixels) LCD panel
>> +
>> +Required properties:
>> +- compatible: should be "starry,kr070pe2t"
>> +
>> +This binding is compatible with the simple-panel binding, which is
>> specified
>> +in simple-panel.txt in this directory.
>> diff --git a/drivers/gpu/drm/panel/panel-simple.c
>> b/drivers/gpu/drm/panel/panel-simple.c
>> index e14c14ac6..027a2612b 100644
>> --- a/drivers/gpu/drm/panel/panel-simple.c
>> +++ b/drivers/gpu/drm/panel/panel-simple.c
>> @@ -2842,6 +2842,29 @@ static const struct panel_desc
>> shelly_sca07010_bfn_lnn = {
>> .bus_format = MEDIA_BUS_FMT_RGB666_1X18,
>> };
>>
>> +static const struct drm_display_mode starry_kr070pe2t_mode = {
>> + .clock = 33000,
>> + .hdisplay = 800,
>> + .hsync_start = 800 + 209,
>> + .hsync_end = 800 + 209 + 1,
>> + .htotal = 800 + 209 + 1 + 45,
>> + .vdisplay = 480,
>> + .vsync_start = 480 + 22,
>> + .vsync_end = 480 + 22 + 1,
>> + .vtotal = 480 + 22 + 1 + 22,
>> + .vrefresh = 60,
>> +};
>
> Please adjust so:
> vrefresh * htotal * vtotal == clock.
> I cannot say what needs to be adjusted.
> But we are moving away from specifying vrefresh and want the
> data to be OK.

Just like Ville Syrjälä, I ran the numbers and vrefresh indeed
calculates to 59.58.

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