linux-kernel - Re: [PATCH 1/2] drm/panel: NT39016: Add support for multiple modes

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Message-ID: <20200408102753.GA25805@ravnborg.org>
Date:   Wed, 8 Apr 2020 12:27:53 +0200
From:   Sam Ravnborg <sam@...nborg.org>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Thierry Reding <thierry.reding@...il.com>, od@...c.me,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drm/panel: NT39016: Add support for multiple modes

On Wed, Apr 08, 2020 at 12:12:26PM +0200, Paul Cercueil wrote:
> Hi Sam,
> 
> 
> Le mer. 8 avril 2020 à 12:04, Sam Ravnborg <sam@...nborg.org> a écrit :
> > Hi Paul.
> > 
> > On Wed, Apr 08, 2020 at 11:58:29AM +0200, Paul Cercueil wrote:
> > >  Add support for multiple drm_display_mode entries. This will allow
> > > to
> > >  add a 50 Hz mode later.
> > > 
> > >  Signed-off-by: Paul Cercueil <paul@...pouillou.net>
> > Patch looks good.
> > 
> > Could we please use lower case in the $subject?
> 
> You mean 's/Add/add/' or the panel name as well?

The panel name. We are not consistent if we start sentences in $subject
with lower or upper case - so Add and add are both fine.
But the panel name is (almost) always with lower case.

	Sam
> 
> -Paul
> 
> > Acked-by: Sam Ravnborg <sam@...nborg.org>
> > 
> > I asume you will apply yourself.
> > 
> > 	Sam
> > 
> > >  ---
> > >   drivers/gpu/drm/panel/panel-novatek-nt39016.c | 33
> > > +++++++++++++------
> > >   1 file changed, 23 insertions(+), 10 deletions(-)
> > > 
> > >  diff --git a/drivers/gpu/drm/panel/panel-novatek-nt39016.c
> > > b/drivers/gpu/drm/panel/panel-novatek-nt39016.c
> > >  index a470810f7dbe..f1286cf6528b 100644
> > >  --- a/drivers/gpu/drm/panel/panel-novatek-nt39016.c
> > >  +++ b/drivers/gpu/drm/panel/panel-novatek-nt39016.c
> > >  @@ -49,7 +49,8 @@ enum nt39016_regs {
> > >   #define NT39016_SYSTEM_STANDBY	BIT(1)
> > > 
> > >   struct nt39016_panel_info {
> > >  -	struct drm_display_mode display_mode;
> > >  +	const struct drm_display_mode *display_modes;
> > >  +	unsigned int num_modes;
> > >   	u16 width_mm, height_mm;
> > >   	u32 bus_format, bus_flags;
> > >   };
> > >  @@ -212,15 +213,22 @@ static int nt39016_get_modes(struct drm_panel
> > > *drm_panel,
> > >   	struct nt39016 *panel = to_nt39016(drm_panel);
> > >   	const struct nt39016_panel_info *panel_info = panel->panel_info;
> > >   	struct drm_display_mode *mode;
> > >  +	unsigned int i;
> > > 
> > >  -	mode = drm_mode_duplicate(connector->dev,
> > > &panel_info->display_mode);
> > >  -	if (!mode)
> > >  -		return -ENOMEM;
> > >  +	for (i = 0; i < panel_info->num_modes; i++) {
> > >  +		mode = drm_mode_duplicate(connector->dev,
> > >  +					  &panel_info->display_modes[i]);
> > >  +		if (!mode)
> > >  +			return -ENOMEM;
> > >  +
> > >  +		drm_mode_set_name(mode);
> > > 
> > >  -	drm_mode_set_name(mode);
> > >  +		mode->type = DRM_MODE_TYPE_DRIVER;
> > >  +		if (panel_info->num_modes == 1)
> > >  +			mode->type |= DRM_MODE_TYPE_PREFERRED;
> > > 
> > >  -	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> > >  -	drm_mode_probed_add(connector, mode);
> > >  +		drm_mode_probed_add(connector, mode);
> > >  +	}
> > > 
> > >   	connector->display_info.bpc = 8;
> > >   	connector->display_info.width_mm = panel_info->width_mm;
> > >  @@ -230,7 +238,7 @@ static int nt39016_get_modes(struct drm_panel
> > > *drm_panel,
> > >   					 &panel_info->bus_format, 1);
> > >   	connector->display_info.bus_flags = panel_info->bus_flags;
> > > 
> > >  -	return 1;
> > >  +	return panel_info->num_modes;
> > >   }
> > > 
> > >   static const struct drm_panel_funcs nt39016_funcs = {
> > >  @@ -316,8 +324,8 @@ static int nt39016_remove(struct spi_device
> > > *spi)
> > >   	return 0;
> > >   }
> > > 
> > >  -static const struct nt39016_panel_info kd035g6_info = {
> > >  -	.display_mode = {
> > >  +static const struct drm_display_mode kd035g6_display_modes[] = {
> > >  +	{
> > >   		.clock = 6000,
> > >   		.hdisplay = 320,
> > >   		.hsync_start = 320 + 10,
> > >  @@ -330,6 +338,11 @@ static const struct nt39016_panel_info
> > > kd035g6_info = {
> > >   		.vrefresh = 60,
> > >   		.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
> > >   	},
> > >  +};
> > >  +
> > >  +static const struct nt39016_panel_info kd035g6_info = {
> > >  +	.display_modes = kd035g6_display_modes,
> > >  +	.num_modes = ARRAY_SIZE(kd035g6_display_modes),
> > >   	.width_mm = 71,
> > >   	.height_mm = 53,
> > >   	.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
> > >  --
> > >  2.25.1
>