[PATCH V3 2/2] drm/panel: nv3051d: Add Support for Anbernic 351V

[Jessica Zhang]

On 10/2/2023 12:30 PM, Chris Morgan wrote:
> From: Chris Morgan <macromorgan at hotmail.com>
> 
> Add support for the Anbernic 351V. Just like the 353 series the
> underlying vendor is unknown/unmarked (at least not visible in a
> non-destructive manner). The panel had slightly different init
> sequences and timings in the BSP kernel, but works fine with the
> same ones used in the existing driver. The panel will not work without
> the inclusion of the MIPI_DSI_CLOCK_NON_CONTINUOUS flag, and this flag
> prevents the 353 series from working correctly, so a new compatible
> string is added.
> 
> Tested colors and timings using modetest and all seem to work identical
> to the 353 otherwise.
> 
> Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
> ---
>   drivers/gpu/drm/panel/panel-newvision-nv3051d.c | 8 ++++++++
>   1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panel/panel-newvision-nv3051d.c b/drivers/gpu/drm/panel/panel-newvision-nv3051d.c
> index ad98dd9322b4..f644dbc8ee8a 100644
> --- a/drivers/gpu/drm/panel/panel-newvision-nv3051d.c
> +++ b/drivers/gpu/drm/panel/panel-newvision-nv3051d.c
> @@ -354,6 +354,7 @@ static const struct drm_panel_funcs panel_nv3051d_funcs = {
>   static int panel_nv3051d_probe(struct mipi_dsi_device *dsi)
>   {
>   	struct device *dev = &dsi->dev;
> +	struct device_node *np = dev->of_node;

Hi Chris,

Thanks for the patch.

It mostly looks good to me, but just one question here -- why not pass 
in `dev->of_node` directly into `of_device_is_compatible()`?

Thanks,

Jessica Zhang

>   	struct panel_nv3051d *ctx;
>   	int ret;
>   
> @@ -388,6 +389,13 @@ static int panel_nv3051d_probe(struct mipi_dsi_device *dsi)
>   	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
>   			  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET;
>   
> +	/*
> +	 * The panel in the RG351V is identical to the 353P, except it
> +	 * requires MIPI_DSI_CLOCK_NON_CONTINUOUS to operate correctly.
> +	 */
> +	if (of_device_is_compatible(np, "anbernic,rg351v-panel"))
> +		dsi->mode_flags |= MIPI_DSI_CLOCK_NON_CONTINUOUS; > +
>   	drm_panel_init(&ctx->panel, &dsi->dev, &panel_nv3051d_funcs,
>   		       DRM_MODE_CONNECTOR_DSI);
>   
> -- 
> 2.34.1
>