[PATCH v6 17/25] drm/renesas/rcar-du: Compute dumb-buffer sizes with drm_mode_size_dumb()
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: 2025-08-21 08:23:22
Also in:
dri-devel, imx, intel-xe, linux-arm-msm, linux-mediatek, linux-renesas-soc, linux-rockchip, linux-samsung-soc, linux-tegra, nouveau, xen-devel
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for renesas r-car, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Laurent Pinchart, Tomi Valkeinen, Linus Torvalds
Call drm_mode_size_dumb() to compute dumb-buffer scanline pitch and buffer size. Align the pitch according to hardware requirements. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen+renesas@ideasonboard.com> --- drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
index 216219accfd9..6294443f6068 100644
--- a/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
+++ b/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c@@ -11,6 +11,7 @@ #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> #include <drm/drm_device.h> +#include <drm/drm_dumb_buffers.h> #include <drm/drm_framebuffer.h> #include <drm/drm_gem_dma_helper.h> #include <drm/drm_gem_framebuffer_helper.h>
@@ -407,8 +408,8 @@ int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev, struct drm_mode_create_dumb *args) { struct rcar_du_device *rcdu = to_rcar_du_device(dev); - unsigned int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8); unsigned int align; + int ret; /* * The R8A7779 DU requires a 16 pixels pitch alignment as documented,
@@ -419,7 +420,9 @@ int rcar_du_dumb_create(struct drm_file *file, struct drm_device *dev, else align = 16 * args->bpp / 8; - args->pitch = roundup(min_pitch, align); + ret = drm_mode_size_dumb(dev, args, align, 0); + if (ret) + return ret; return drm_gem_dma_dumb_create_internal(file, dev, args); }
--
2.50.1