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

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Message-Id: <QCSG8Q.N40UK3F20OVT2@crapouillou.net>
Date:   Wed, 08 Apr 2020 12:12:26 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Sam Ravnborg <sam@...nborg.org>
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

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?

-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