[PATCH] drm/panel-simple: Add Vivax TPC-9150 panel v5

[Sam Ravnborg]

Hi Nikola,

On Sat, Oct 02, 2021 at 10:30:17PM +0200, Nikola Pavlica wrote:
> The model and make of the LCD panel of the Vivax TPC-9150 is unknown,
> hence the panel settings that were retrieved with a FEX dump are named
> after the device NOT the actual panel.
> 
> The LCD in question is a 50 pin MISO TFT LCD panel of the resolution
> 1024x600 used by the aforementioned device.
> 
> Version 2, as Thierry kindly suggested that I fix the order in which the
> panel was ordered compared to others.
> 
> Version 3, filling in the required info suggested by Sam. Plus some
> factual issues that I've corrected myself (tested working)
> 
> Version 4, rearranged the display parameters and fix invalid bit format
> issue. (Thanks Sam)
> 
> Version 5, referred to FEX file instead of manual debugging for
> information.
> 
> NOTE: Seperate dt-binding patch has been sent to THAT mailing list. So
> that's why they're NOT included here. Advise freely if that's not how
> you're supposed to do it.
The preference is to keep all related patches in one series.
In this case we cannot apply the panel patches before the dt-bindings
patches for example.
It is mood in this case as I already applied the bindings patches.

> 
> Thanks,
> Nikola

There is one detail to fix, see below.

> 
> Signed-off-by: Nikola Pavlica <pavlica.nikola at gmail.com>
> ---
>  drivers/gpu/drm/panel/panel-simple.c | 29 ++++++++++++++++++++++++++++
>  1 file changed, 29 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index 9b6c4e6c3..680fd3f72 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -4363,6 +4363,32 @@ static const struct panel_desc urt_umsh_8596md_parallel = {
>  	.bus_format = MEDIA_BUS_FMT_RGB666_1X18,
>  };
> 
> +static const struct drm_display_mode vivax_tpc9150_panel_mode = {
> +	.clock = 60000,
> +	.hdisplay = 1024,
> +	.hsync_start = 1024 + 160,
> +	.hsync_end = 1024 + 160 + 100,
> +	.htotal = 1024 + 160 + 100 + 60,
> +	.vdisplay = 600,
> +	.vsync_start = 600 + 12,
> +	.vsync_end = 600 + 12 + 10,
> +	.vtotal = 600 + 12 + 10 + 13,
> +};
> +
> +static const struct panel_desc vivax_tpc9150_panel = {
> +	.modes = &vivax_tpc9150_panel_mode,
> +	.num_modes = 1,
> +	.bpc = 6,
> +	.size = {
> +		.width = 200,
> +		.height = 115,
> +	},
> +	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
> +	.bus_flags = DRM_BUS_FLAG_DE_HIGH,
> +	.connector_type = DRM_MODE_CONNECTOR_LVDS,

The LVDS connector with a bpc og 6 only accpets the following
bus_format: MEDIA_BUS_FMT_RGB666_1X7X3_SPWG

See panel-simple.c panel_simple_probe() around line 612.


So either the bus_format is wrong, or the connector_type is wrong.
Please fix and resend.

	Sam