linux-kernel - Re: [PATCH v2 6/6] drm/panel: simple: Innolux TV123WAM is actually P120ZDG-BF1

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Date:   Fri, 26 Oct 2018 10:44:44 -0400
From:   Sean Paul <sean@...rly.run>
To:     Douglas Anderson <dianders@...omium.org>
Cc:     Sean Paul <seanpaul@...omium.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sandeep Panda <spanda@...eaurora.org>,
        linux-arm-msm@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        jsanka@...eaurora.org, ryandcase@...omium.org,
        David Airlie <airlied@...ux.ie>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 6/6] drm/panel: simple: Innolux TV123WAM is actually
 P120ZDG-BF1

On Thu, Oct 25, 2018 at 03:21:34PM -0700, Douglas Anderson wrote:
> As far as I can tell the panel that was added in commit da50bd4258db
> ("drm/panel: simple: Add Innolux TV123WAM panel driver support")
> wasn't actually an Innolux TV123WAM but was actually an Innolux
> P120ZDG-BF1.
> 
> As far as I can tell the Innolux TV123WAM isn't a real panel and but
> it's a mosh between the TI TV123WAM and the Innolux P120ZDG-BF1.
> Let's unmosh.
> 
> Here's my evidence:
> 
> * Searching for TV123WAM on the Internet turns up a TI panel.  While
>   it's possible that an Innolux panel has the same model number as the
>   TI Panel, it seems a little doubtful.  Looking up the datasheet from
>   the TI Panel shows that it's 1920 x 1280 and 259.2 mm x 172.8 mm.
> 
> * As far as I know, the patch adding the Innolux Panel was supposed to
>   be for the board that's sitting in front of me as I type this
>   (support for that board is not yet upstream).  On the back of that
>   panel I see Innolux P120ZDZ-EZ1 rev B1.
> 
> * Someone pointed me at a datasheet that's supposed to be for the
>   panel in front of me (sorry, I can't share the datasheet).  That
>   datasheet has the string "p120zdg-bf1"
> 
> * If I search for "P120ZDG-BF1" on the Internet I get hits for panels
>   that are 2160x1440.  They don't have datasheets, but the fact that
>   the resolution matches is a good sign.
> 
> In any case, let's update the name and also the physical size to match
> the correct panel.
> 
> Fixes: da50bd4258db ("drm/panel: simple: Add Innolux TV123WAM panel driver support")
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> Reviewed-by: Abhinav Kumar <abhinavk@...eaurora.org>
> Cc: Sandeep Panda <spanda@...eaurora.org>

Reviewed-by: Sean Paul <sean@...rly.run>

> ---
> 
> Changes in v2: None
> 
>  drivers/gpu/drm/panel/panel-simple.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c
> index 88592f9a0018..a04ffb3b2174 100644
> --- a/drivers/gpu/drm/panel/panel-simple.c
> +++ b/drivers/gpu/drm/panel/panel-simple.c
> @@ -1373,7 +1373,7 @@ static const struct panel_desc innolux_n156bge_l21 = {
>  	},
>  };
>  
> -static const struct drm_display_mode innolux_tv123wam_mode = {
> +static const struct drm_display_mode innolux_p120zdg_bf1_mode = {
>  	.clock = 206016,
>  	.hdisplay = 2160,
>  	.hsync_start = 2160 + 48,
> @@ -1387,13 +1387,13 @@ static const struct drm_display_mode innolux_tv123wam_mode = {
>  	.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
>  };
>  
> -static const struct panel_desc innolux_tv123wam = {
> -	.modes = &innolux_tv123wam_mode,
> +static const struct panel_desc innolux_p120zdg_bf1 = {
> +	.modes = &innolux_p120zdg_bf1_mode,
>  	.num_modes = 1,
>  	.bpc = 8,
>  	.size = {
> -		.width = 259,
> -		.height = 173,
> +		.width = 254,
> +		.height = 169,
>  	},
>  	.delay = {
>  		.hpd_absent_delay = 200,
> @@ -2456,8 +2456,8 @@ static const struct of_device_id platform_of_match[] = {
>  		.compatible = "innolux,n156bge-l21",
>  		.data = &innolux_n156bge_l21,
>  	}, {
> -		.compatible = "innolux,tv123wam",
> -		.data = &innolux_tv123wam,
> +		.compatible = "innolux,p120zdg-bf1",
> +		.data = &innolux_p120zdg_bf1,
>  	}, {
>  		.compatible = "innolux,zj070na-01p",
>  		.data = &innolux_zj070na_01p,
> -- 
> 2.19.1.568.g152ad8e336-goog
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS