linux-kernel - Re: [PATCHv2 2/5] drm/imx: Add 8 pixel alignment fix

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Date:   Mon, 10 May 2021 16:47:05 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Sebastian Reichel <sebastian.reichel@...labora.com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Saravana Kannan <saravanak@...gle.com>,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rtc@...r.kernel.org, linux-mtd@...ts.infradead.org,
        kernel@...labora.com,
        Boris Brezillon <boris.brezillon@...labora.com>
Subject: Re: [PATCHv2 2/5] drm/imx: Add 8 pixel alignment fix

Hi Sebastian,

On Thu, 2021-04-29 at 00:29 +0200, Sebastian Reichel wrote:
> Some standard resolutions like 1366x768 do not work properly with
> i.MX6 SoCs, since the horizontal resolution needs to be aligned
> to 8 pixels (so 1360x768 or 1368x768 would work).
> 
> This patch allocates framebuffers allocated to 8 pixels. The extra
> time required to send the extra pixels are removed from the blank
> time. In order to expose the correct display size to userspace,
> the stride is increased without increasing the width.
> 
> Without this patch systems with this display resolution hang
> indefinitely during boot up.
> 
> Suggested-by: Boris Brezillon <boris.brezillon@...labora.com>
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>

Thank you, I've rebased and applied this patch on top of imx-drm/next.

regards
Philipp