Re: [PATCH 3/9] drm: atmel-hlcdc: add LCD controller layer definition for SAM9X7

From: Sam Ravnborg <sam@ravnborg.org>
To: Manikandan Muralidharan <manikandan.m@microchip.com>
Cc: Nayabbasha.Sayed@microchip.com, devicetree@vger.kernel.org,
	alexandre.belloni@bootlin.com, bbrezillon@kernel.org,
	linux-kernel@vger.kernel.org,
	Balamanikandan.Gunasundar@microchip.com, lee@kernel.org,
	conor+dt@kernel.org, dri-devel@lists.freedesktop.org,
	nicolas.ferre@microchip.com, Varshini.Rajendran@microchip.com,
	Dharma.B@microchip.com, robh+dt@kernel.org,
	Durai.ManickamKR@microchip.com,
	krzysztof.kozlowski+dt@linaro.org, Hari.PrasathGE@microchip.com,
	Balakrishnan.S@microchip.com, claudiu.beznea@microchip.com,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/9] drm: atmel-hlcdc: add LCD controller layer definition for SAM9X7
Date: Mon, 26 Jun 2023 22:19:06 +0200	[thread overview]
Message-ID: <20230626201906.GA11422@ravnborg.org> (raw)
In-Reply-To: <20230613070426.467389-4-manikandan.m@microchip.com>

Hi Manikandan,

On Tue, Jun 13, 2023 at 12:34:20PM +0530, Manikandan Muralidharan wrote:
> Add the LCD controller layer definition and descriptor structure for SAM9X7
> for the following layers,
> - Base Layer
> - Overlay1 Layer
> - Overlay2 Layer
> - High End Overlay
> 
> Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
> ---
>  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 96 ++++++++++++++++++++
>  1 file changed, 96 insertions(+)
> 
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> index fa0f9a93d50d..d7ad828e9e8c 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> @@ -462,6 +462,98 @@ static const struct atmel_hlcdc_dc_desc atmel_hlcdc_dc_sam9x60 = {
>  	.layers = atmel_hlcdc_sam9x60_layers,
>  };
>  
> +static const struct atmel_hlcdc_layer_desc atmel_xlcdc_sam9x7_layers[] = {
> +	{
> +		.name = "base",
> +		.formats = &atmel_hlcdc_plane_rgb_formats,
> +		.regs_offset = 0x60,
> +		.id = 0,
> +		.type = ATMEL_HLCDC_BASE_LAYER,
> +		.cfgs_offset = 0x1c,
> +		.layout = {
> +			.xstride = { 2 },
> +			.default_color = 3,
> +			.general_config = 4,
> +			.disc_pos = 5,
> +			.disc_size = 6,
> +		},
> +		.clut_offset = 0x700,
> +	},
> +	{
> +		.name = "overlay1",
> +		.formats = &atmel_hlcdc_plane_rgb_formats,
> +		.regs_offset = 0x160,
> +		.id = 1,
> +		.type = ATMEL_HLCDC_OVERLAY_LAYER,
> +		.cfgs_offset = 0x1c,
> +		.layout = {
> +			.pos = 2,
> +			.size = 3,
> +			.xstride = { 4 },
> +			.pstride = { 5 },
> +			.default_color = 6,
> +			.chroma_key = 7,
> +			.chroma_key_mask = 8,
> +			.general_config = 9,
> +		},
> +		.clut_offset = 0xb00,
> +	},
> +	{
> +		.name = "overlay2",
> +		.formats = &atmel_hlcdc_plane_rgb_formats,
> +		.regs_offset = 0x260,
> +		.id = 2,
> +		.type = ATMEL_HLCDC_OVERLAY_LAYER,
> +		.cfgs_offset = 0x1c,
> +		.layout = {
> +			.pos = 2,
> +			.size = 3,
> +			.xstride = { 4 },
> +			.pstride = { 5 },
> +			.default_color = 6,
> +			.chroma_key = 7,
> +			.chroma_key_mask = 8,
> +			.general_config = 9,
> +		},
> +		.clut_offset = 0xf00,
> +	},
> +	{
> +		.name = "high-end-overlay",
> +		.formats = &atmel_hlcdc_plane_rgb_and_yuv_formats,
> +		.regs_offset = 0x360,
> +		.id = 3,
> +		.type = ATMEL_HLCDC_OVERLAY_LAYER,
> +		.cfgs_offset = 0x30,
> +		.layout = {
> +			.pos = 2,
> +			.size = 3,
> +			.memsize = 4,
> +			.xstride = { 5, 7 },
> +			.pstride = { 6, 8 },
> +			.default_color = 9,
> +			.chroma_key = 10,
> +			.chroma_key_mask = 11,
> +			.general_config = 12,
> +			.csc = 16,
> +			.scaler_config = 23,
> +		},
> +		.clut_offset = 0x1300,
> +	},
> +};
> +
> +static const struct atmel_hlcdc_dc_desc atmel_xlcdc_dc_sam9x7 = {
> +	.min_width = 0,
> +	.min_height = 0,
> +	.max_width = 2048,
> +	.max_height = 2048,
> +	.max_spw = 0xff,
> +	.max_vpw = 0xff,
> +	.max_hpw = 0x3ff,
> +	.fixed_clksrc = true,
> +	.nlayers = ARRAY_SIZE(atmel_xlcdc_sam9x7_layers),
> +	.layers = atmel_xlcdc_sam9x7_layers,
> +};

As already suggested by someone else, add is_xlcdc to struct
atmel_hlcdc_dc_desc, so the check for the compatible can be dropped.
It would be better to put it here.

	Sam