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>, Javier Martinez Canillas <javierm@redhat.com>, Sam Ravnborg <sam@ravnborg.org>, Helge Deller <deller@gmx.de> 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 v2 01/10] drm/fourcc: Add drm_format_info_bpp() helper Date: Mon, 7 Mar 2022 21:52:36 +0100 [thread overview] Message-ID: <eab1fe866c0ffd4ac097e66ff48725dd39893105.1646683502.git.geert@linux-m68k.org> (raw) In-Reply-To: <cover.1646683502.git.geert@linux-m68k.org> Add a helper to retrieve the actual number of bits per pixel for a plane, taking into account the number of characters and pixels per block for tiled formats. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> --- v2: - Move up. --- drivers/gpu/drm/drm_fourcc.c | 19 +++++++++++++++++++ include/drm/drm_fourcc.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index 07741b678798b0f1..cf48ea0b2cb70ba8 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -370,6 +370,25 @@ unsigned int drm_format_info_block_height(const struct drm_format_info *info, } EXPORT_SYMBOL(drm_format_info_block_height); +/** + * drm_format_info_bpp - number of bits per pixel + * @info: pixel format info + * @plane: plane index + * + * Returns: + * The actual number of bits per pixel, depending on the plane index. + */ +unsigned int drm_format_info_bpp(const struct drm_format_info *info, int plane) +{ + if (!info || plane < 0 || plane >= info->num_planes) + return 0; + + return info->char_per_block[plane] * 8 / + (drm_format_info_block_width(info, plane) * + drm_format_info_block_height(info, plane)); +} +EXPORT_SYMBOL(drm_format_info_bpp); + /** * drm_format_info_min_pitch - computes the minimum required pitch in bytes * @info: pixel format info diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 22aa64d07c7905e2..3800a7ad7f0cda7a 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -313,6 +313,7 @@ unsigned int drm_format_info_block_width(const struct drm_format_info *info, int plane); unsigned int drm_format_info_block_height(const struct drm_format_info *info, int plane); +unsigned int drm_format_info_bpp(const struct drm_format_info *info, int plane); uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, int plane, unsigned int buffer_width); -- 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>, Javier Martinez Canillas <javierm@redhat.com>, Sam Ravnborg <sam@ravnborg.org>, Helge Deller <deller@gmx.de> 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 v2 01/10] drm/fourcc: Add drm_format_info_bpp() helper Date: Mon, 7 Mar 2022 21:52:36 +0100 [thread overview] Message-ID: <eab1fe866c0ffd4ac097e66ff48725dd39893105.1646683502.git.geert@linux-m68k.org> (raw) In-Reply-To: <cover.1646683502.git.geert@linux-m68k.org> Add a helper to retrieve the actual number of bits per pixel for a plane, taking into account the number of characters and pixels per block for tiled formats. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> --- v2: - Move up. --- drivers/gpu/drm/drm_fourcc.c | 19 +++++++++++++++++++ include/drm/drm_fourcc.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c index 07741b678798b0f1..cf48ea0b2cb70ba8 100644 --- a/drivers/gpu/drm/drm_fourcc.c +++ b/drivers/gpu/drm/drm_fourcc.c @@ -370,6 +370,25 @@ unsigned int drm_format_info_block_height(const struct drm_format_info *info, } EXPORT_SYMBOL(drm_format_info_block_height); +/** + * drm_format_info_bpp - number of bits per pixel + * @info: pixel format info + * @plane: plane index + * + * Returns: + * The actual number of bits per pixel, depending on the plane index. + */ +unsigned int drm_format_info_bpp(const struct drm_format_info *info, int plane) +{ + if (!info || plane < 0 || plane >= info->num_planes) + return 0; + + return info->char_per_block[plane] * 8 / + (drm_format_info_block_width(info, plane) * + drm_format_info_block_height(info, plane)); +} +EXPORT_SYMBOL(drm_format_info_bpp); + /** * drm_format_info_min_pitch - computes the minimum required pitch in bytes * @info: pixel format info diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h index 22aa64d07c7905e2..3800a7ad7f0cda7a 100644 --- a/include/drm/drm_fourcc.h +++ b/include/drm/drm_fourcc.h @@ -313,6 +313,7 @@ unsigned int drm_format_info_block_width(const struct drm_format_info *info, int plane); unsigned int drm_format_info_block_height(const struct drm_format_info *info, int plane); +unsigned int drm_format_info_bpp(const struct drm_format_info *info, int plane); uint64_t drm_format_info_min_pitch(const struct drm_format_info *info, int plane, unsigned int buffer_width); -- 2.25.1
next prev parent reply other threads:[~2022-03-07 20:53 UTC|newest] Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-07 20:52 [PATCH v2 00/10] drm: Add support for low-color frame buffer formats Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven [this message] 2022-03-07 20:52 ` [PATCH v2 01/10] drm/fourcc: Add drm_format_info_bpp() helper Geert Uytterhoeven 2022-03-09 12:46 ` Javier Martinez Canillas 2022-03-09 12:46 ` Javier Martinez Canillas 2022-03-07 20:52 ` [PATCH v2 02/10] drm/fourcc: Add drm_format_info.is_color_indexed flag Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-09 12:50 ` Javier Martinez Canillas 2022-03-09 12:50 ` Javier Martinez Canillas 2022-03-07 20:52 ` [PATCH v2 03/10] drm/client: Use actual bpp when allocating frame buffers Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-09 12:51 ` Javier Martinez Canillas 2022-03-09 12:51 ` Javier Martinez Canillas 2022-03-07 20:52 ` [PATCH v2 04/10] drm/framebuffer: Use actual bpp for DRM_IOCTL_MODE_GETFB Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-09 12:53 ` Javier Martinez Canillas 2022-03-09 12:53 ` Javier Martinez Canillas 2022-03-07 20:52 ` [PATCH v2 05/10] drm/fourcc: Add DRM_FORMAT_C[124] Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-08 9:04 ` Pekka Paalanen 2022-03-08 9:04 ` Pekka Paalanen 2022-03-09 12:57 ` Javier Martinez Canillas 2022-03-09 12:57 ` Javier Martinez Canillas 2022-03-14 13:30 ` Geert Uytterhoeven 2022-03-14 13:30 ` Geert Uytterhoeven 2022-03-14 15:05 ` Pekka Paalanen 2022-03-14 15:05 ` Pekka Paalanen 2022-03-14 19:01 ` Geert Uytterhoeven 2022-03-14 19:01 ` Geert Uytterhoeven 2022-03-14 22:15 ` Finn Thain 2022-03-14 22:15 ` Finn Thain 2022-03-15 7:32 ` Pekka Paalanen 2022-03-15 7:32 ` Pekka Paalanen 2022-03-15 7:51 ` Geert Uytterhoeven 2022-03-15 7:51 ` Geert Uytterhoeven 2022-03-15 7:52 ` Geert Uytterhoeven 2022-03-15 7:52 ` Geert Uytterhoeven 2022-03-15 8:45 ` Pekka Paalanen 2022-03-15 8:45 ` Pekka Paalanen 2022-03-15 8:57 ` Geert Uytterhoeven 2022-03-15 8:57 ` Geert Uytterhoeven 2022-03-15 10:48 ` Pekka Paalanen 2022-03-15 10:48 ` Pekka Paalanen 2022-03-07 20:52 ` [PATCH v2 06/10] drm/fb-helper: Add support for DRM_FORMAT_C[124] Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-09 13:10 ` Javier Martinez Canillas 2022-03-09 13:10 ` Javier Martinez Canillas 2022-03-09 13:14 ` Geert Uytterhoeven 2022-03-09 13:14 ` Geert Uytterhoeven 2022-03-07 20:52 ` [PATCH v2 RFC 07/10] drm/gem-fb-helper: Use actual bpp for size calculations Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-09 13:16 ` Javier Martinez Canillas 2022-03-09 13:16 ` Javier Martinez Canillas 2022-03-07 20:52 ` [PATCH v2 RFC 08/10] drm/fourcc: Document that single-channel "red" can be any color Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-08 9:06 ` Pekka Paalanen 2022-03-08 9:06 ` Pekka Paalanen 2022-03-09 13:33 ` Javier Martinez Canillas 2022-03-09 13:33 ` Javier Martinez Canillas 2022-03-07 20:52 ` [PATCH v2 RFC 09/10] drm/fourcc: Add DRM_FORMAT_R[124] Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-09 13:39 ` Javier Martinez Canillas 2022-03-09 13:39 ` Javier Martinez Canillas 2022-03-07 20:52 ` [PATCH v2 RFC 10/10] drm/fourcc: Add DRM_FORMAT_D[1248] Geert Uytterhoeven 2022-03-07 20:52 ` Geert Uytterhoeven 2022-03-09 13:41 ` Javier Martinez Canillas 2022-03-09 13:41 ` Javier Martinez Canillas
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