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From: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>, mchehab@kernel.org
Cc: linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Subject: [PATCH 4/6] media: vsp1: Document max_width restriction on SRU
Date: Fri, 31 Aug 2018 15:40:42 +0100	[thread overview]
Message-ID: <20180831144044.31713-5-kieran.bingham+renesas@ideasonboard.com> (raw)
In-Reply-To: <20180831144044.31713-1-kieran.bingham+renesas@ideasonboard.com>

The SRU is currently restricted to 256 pixels as part of the current
partition algorithm. Document that the actual capability of this
component is 288 pixels, but don't increase the implementation.

The extended partition algorithm may later choose to utilise a larger
input to support overlapping partitions.

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
---
 drivers/media/platform/vsp1/vsp1_sru.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/media/platform/vsp1/vsp1_sru.c b/drivers/media/platform/vsp1/vsp1_sru.c
index f277700e5cc2..2a40e09b9aa7 100644
--- a/drivers/media/platform/vsp1/vsp1_sru.c
+++ b/drivers/media/platform/vsp1/vsp1_sru.c
@@ -314,6 +314,10 @@ static unsigned int sru_max_width(struct vsp1_entity *entity,
 	output = vsp1_entity_get_pad_format(&sru->entity, sru->entity.config,
 					    SRU_PAD_SOURCE);
 
+	/*
+	 * The maximum width of the SRU is 288 input pixels, but to support the
+	 * partition algorithm, this is currently kept at 256.
+	 */
 	if (input->width != output->width)
 		return 512;
 	else
-- 
2.17.1


  parent reply	other threads:[~2018-08-31 14:40 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-31 14:40 [PATCH 0/6] VSP1 Updates Kieran Bingham
2018-08-31 14:40 ` [PATCH 1/6] media: vsp1: Remove artificial pixel limitation Kieran Bingham
2018-09-14 10:23   ` Laurent Pinchart
2018-09-14 10:47     ` Laurent Pinchart
2018-09-14 10:51       ` Kieran Bingham
2018-08-31 14:40 ` [PATCH 2/6] media: vsp1: Correct the pitch on multiplanar formats Kieran Bingham
2018-09-14 10:25   ` Laurent Pinchart
2018-09-14 10:59     ` Kieran Bingham
2018-08-31 14:40 ` [PATCH 3/6] media: vsp1: Implement partition algorithm restrictions Kieran Bingham
2018-09-14 10:38   ` Laurent Pinchart
2018-08-31 14:40 ` Kieran Bingham [this message]
2018-09-14 10:42   ` [PATCH 4/6] media: vsp1: Document max_width restriction on SRU Laurent Pinchart
2018-08-31 14:40 ` [PATCH 5/6] media: vsp1: Document max_width restriction on UDS Kieran Bingham
2018-08-31 14:40 ` [PATCH 6/6] media: vsp1: use periods at the end of comment sentences Kieran Bingham
2018-09-14 10:46   ` Laurent Pinchart

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