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From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Helge Deller <deller@gmx.de>,
	Javier Martinez Canillas <javierm@redhat.com>
Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
	linux-m68k@vger.kernel.org, linux-kernel@vger.kernel.org,
	Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [PATCH 4/8] drm/client: Use actual bpp when allocating frame buffers
Date: Tue, 15 Feb 2022 17:52:22 +0100	[thread overview]
Message-ID: <20220215165226.2738568-5-geert@linux-m68k.org> (raw)
In-Reply-To: <20220215165226.2738568-1-geert@linux-m68k.org>

When allocating a frame buffer, the number of bits per pixel needed is
derived from the deprecated drm_format_info.cpp[] field.  While this
works for formats using less than 8 bits per pixel, it does lead to a
large overallocation.

Reduce memory consumption by using the actual number of bits per pixel
instead.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 drivers/gpu/drm/drm_client.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index ce45e380f4a2028f..c6a279e3de95591a 100644
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -264,7 +264,7 @@ drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, u
 
 	dumb_args.width = width;
 	dumb_args.height = height;
-	dumb_args.bpp = info->cpp[0] * 8;
+	dumb_args.bpp = drm_format_info_bpp(info, 0);
 	ret = drm_mode_create_dumb(dev, &dumb_args, client->file);
 	if (ret)
 		goto err_delete;
@@ -372,7 +372,7 @@ static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,
 	int ret;
 
 	info = drm_format_info(format);
-	fb_req.bpp = info->cpp[0] * 8;
+	fb_req.bpp = drm_format_info_bpp(info, 0);
 	fb_req.depth = info->depth;
 	fb_req.width = width;
 	fb_req.height = height;
-- 
2.25.1


WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Helge Deller <deller@gmx.de>,
	Javier Martinez Canillas <javierm@redhat.com>
Cc: linux-fbdev@vger.kernel.org,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	linux-m68k@vger.kernel.org, dri-devel@lists.freedesktop.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 4/8] drm/client: Use actual bpp when allocating frame buffers
Date: Tue, 15 Feb 2022 17:52:22 +0100	[thread overview]
Message-ID: <20220215165226.2738568-5-geert@linux-m68k.org> (raw)
In-Reply-To: <20220215165226.2738568-1-geert@linux-m68k.org>

When allocating a frame buffer, the number of bits per pixel needed is
derived from the deprecated drm_format_info.cpp[] field.  While this
works for formats using less than 8 bits per pixel, it does lead to a
large overallocation.

Reduce memory consumption by using the actual number of bits per pixel
instead.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 drivers/gpu/drm/drm_client.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
index ce45e380f4a2028f..c6a279e3de95591a 100644
--- a/drivers/gpu/drm/drm_client.c
+++ b/drivers/gpu/drm/drm_client.c
@@ -264,7 +264,7 @@ drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, u
 
 	dumb_args.width = width;
 	dumb_args.height = height;
-	dumb_args.bpp = info->cpp[0] * 8;
+	dumb_args.bpp = drm_format_info_bpp(info, 0);
 	ret = drm_mode_create_dumb(dev, &dumb_args, client->file);
 	if (ret)
 		goto err_delete;
@@ -372,7 +372,7 @@ static int drm_client_buffer_addfb(struct drm_client_buffer *buffer,
 	int ret;
 
 	info = drm_format_info(format);
-	fb_req.bpp = info->cpp[0] * 8;
+	fb_req.bpp = drm_format_info_bpp(info, 0);
 	fb_req.depth = info->depth;
 	fb_req.width = width;
 	fb_req.height = height;
-- 
2.25.1


  parent reply	other threads:[~2022-02-15 16:52 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-15 16:52 [PATCH 0/8] drm: Add support for low-color frame buffer formats Geert Uytterhoeven
2022-02-15 16:52 ` Geert Uytterhoeven
2022-02-15 16:52 ` [PATCH 1/8] drm/fourcc: Add DRM_FORMAT_C[124] Geert Uytterhoeven
2022-02-15 16:52   ` Geert Uytterhoeven
2022-02-17  9:46   ` Pekka Paalanen
2022-02-17  9:46     ` Pekka Paalanen
2022-02-15 16:52 ` [PATCH 2/8] drm/fb-helper: Add support for DRM_FORMAT_C[124] Geert Uytterhoeven
2022-02-15 16:52   ` Geert Uytterhoeven
2022-02-17 14:57   ` Thomas Zimmermann
2022-02-17 14:57     ` Thomas Zimmermann
2022-02-17 16:12     ` Geert Uytterhoeven
2022-02-17 16:12       ` Geert Uytterhoeven
2022-02-17 16:18       ` Simon Ser
2022-02-17 16:18         ` Simon Ser
2022-02-17 17:21         ` Geert Uytterhoeven
2022-02-17 17:21           ` Geert Uytterhoeven
2022-02-17 20:34       ` Sam Ravnborg
2022-02-17 20:34         ` Sam Ravnborg
2022-02-18  8:14       ` Thomas Zimmermann
2022-02-18  8:14         ` Thomas Zimmermann
2022-02-18  8:53         ` Geert Uytterhoeven
2022-02-18  8:53           ` Geert Uytterhoeven
2022-02-15 16:52 ` [PATCH 3/8] drm/fourcc: Add drm_format_info_bpp() helper Geert Uytterhoeven
2022-02-15 16:52   ` Geert Uytterhoeven
2022-02-15 16:52 ` Geert Uytterhoeven [this message]
2022-02-15 16:52   ` [PATCH 4/8] drm/client: Use actual bpp when allocating frame buffers Geert Uytterhoeven
2022-02-17 14:58   ` Thomas Zimmermann
2022-02-17 14:58     ` Thomas Zimmermann
2022-02-15 16:52 ` [PATCH 5/8] drm/framebuffer: Use actual bpp for DRM_IOCTL_MODE_GETFB Geert Uytterhoeven
2022-02-15 16:52   ` Geert Uytterhoeven
2022-02-15 16:52 ` [PATCH 6/8] drm/gem-fb-helper: Use actual bpp for size calculations Geert Uytterhoeven
2022-02-15 16:52   ` Geert Uytterhoeven
2022-02-15 16:52 ` [PATCH 7/8] drm/fourcc: Add DRM_FORMAT_R[124] Geert Uytterhoeven
2022-02-15 16:52   ` Geert Uytterhoeven
2022-02-17 10:02   ` Pekka Paalanen
2022-02-17 10:02     ` Pekka Paalanen
2022-02-15 16:52 ` [PATCH 8/8] drm/fourcc: Add DRM_FORMAT_D1 Geert Uytterhoeven
2022-02-15 16:52   ` Geert Uytterhoeven
2022-02-17 10:10   ` Pekka Paalanen
2022-02-17 10:10     ` Pekka Paalanen
2022-02-17 10:42     ` Geert Uytterhoeven
2022-02-17 10:42       ` Geert Uytterhoeven
2022-02-17 14:28       ` Pekka Paalanen
2022-02-17 14:28         ` Pekka Paalanen
2022-02-17 14:35         ` Michel Dänzer
2022-02-17 14:35           ` Michel Dänzer
2022-02-17 20:36       ` Sam Ravnborg
2022-02-17 20:36         ` Sam Ravnborg
2022-02-17 10:11   ` Simon Ser
2022-02-17 10:11     ` Simon Ser
2022-02-17 20:37 ` [PATCH 0/8] drm: Add support for low-color frame buffer formats Sam Ravnborg
2022-02-17 20:37   ` Sam Ravnborg
2022-02-18  8:56   ` Thomas Zimmermann
2022-02-18  8:56     ` Thomas Zimmermann

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