From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Mon, 1 Aug 2022 13:50:27 +0000 (+0200)
Subject: drm/simpledrm: Compute framebuffer stride if not set
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fd9e3169e42b7b9e3a5c58ca2bc95a15f9de1d6c;p=linux.git

drm/simpledrm: Compute framebuffer stride if not set

Compute the framebuffer's scanline stride length if not given by
the simplefb data.

v3:
	* get pixel size from drm_format_info_bpp() (Geert, Javier)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220801135028.30647-5-tzimmermann@suse.de
---

diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c
index 9d27608d73697..11a7348ccf4dd 100644
--- a/drivers/gpu/drm/tiny/simpledrm.c
+++ b/drivers/gpu/drm/tiny/simpledrm.c
@@ -743,6 +743,9 @@ static struct simpledrm_device *simpledrm_device_create(struct drm_driver *drv,
 		drm_err(dev, "no simplefb configuration found\n");
 		return ERR_PTR(-ENODEV);
 	}
+	if (!stride)
+		stride = DIV_ROUND_UP(drm_format_info_bpp(format, 0) * width, 8);
+
 	sdev->mode = simpledrm_mode(width, height);
 	sdev->format = format;
 	sdev->pitch = stride;