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Message-ID: <20251126-lcd_pitch_alignment-v1-1-991610a1e369@microchip.com> Date: Wed, 26 Nov 2025 15:44:44 +0100 From: Ludovic Desroches <ludovic.desroches@...rochip.com> To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch> CC: <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>, "Ludovic Desroches" <ludovic.desroches@...rochip.com> Subject: [PATCH 1/3] drm/gem-dma: revert the 8-byte alignment constraint Using drm_mode_size_dumb() to compute the size of dumb buffers introduced an 8-byte alignment constraint on the pitch that wasn’t present before. Let’s remove this constraint, which isn’t necessarily required and may cause buffers to be allocated larger than needed. Signed-off-by: Ludovic Desroches <ludovic.desroches@...rochip.com> --- drivers/gpu/drm/drm_gem_dma_helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_gem_dma_helper.c b/drivers/gpu/drm/drm_gem_dma_helper.c index 12d8307997a0a90a9b5c0469bd742130fa6722d5..eb56ba2347966040a3c7fd27e09c8b81bc797daa 100644 --- a/drivers/gpu/drm/drm_gem_dma_helper.c +++ b/drivers/gpu/drm/drm_gem_dma_helper.c @@ -308,7 +308,7 @@ int drm_gem_dma_dumb_create(struct drm_file *file_priv, struct drm_gem_dma_object *dma_obj; int ret; - ret = drm_mode_size_dumb(drm, args, SZ_8, 0); + ret = drm_mode_size_dumb(drm, args, 0, 0); if (ret) return ret; -- 2.51.0
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