From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Pekka Paalanen <ppaalanen@gmail.com>
Cc: Finn Thain <fthain@linux-m68k.org>,
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>,
Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
"Linux/m68k" <linux-m68k@vger.kernel.org>,
DRI Development <dri-devel@lists.freedesktop.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 05/10] drm/fourcc: Add DRM_FORMAT_C[124]
Date: Tue, 15 Mar 2022 08:52:21 +0100 [thread overview]
Message-ID: <CAMuHMdUOwVLBLmxaVUO4yADVCf1k7CyhBZiesHx2Fr4LW3QWMQ@mail.gmail.com> (raw)
In-Reply-To: <CAMuHMdVU=JKwEn-=Wf3CYObtaLt2T7NmWrXUwdPHdvNsbgge=g@mail.gmail.com>
On Tue, Mar 15, 2022 at 8:51 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > Also, when drm_fourcc.h is describing pixel formats, it needs to
> > consider only how a little-endian CPU accesses them. That's how pixel
> > data in memory is described. Display hardware plays no part in that.
> > It is the driver's job to expose the pixel formats that match display
> > hardware behaviour.
>
> But if the "CPU format" does not match the "display support",
s/support/format/
> all pixel data must be converted?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Pekka Paalanen <ppaalanen@gmail.com>
Cc: Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
Finn Thain <fthain@linux-m68k.org>,
David Airlie <airlied@linux.ie>, Helge Deller <deller@gmx.de>,
Javier Martinez Canillas <javierm@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux/m68k <linux-m68k@vger.kernel.org>,
DRI Development <dri-devel@lists.freedesktop.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Sam Ravnborg <sam@ravnborg.org>
Subject: Re: [PATCH v2 05/10] drm/fourcc: Add DRM_FORMAT_C[124]
Date: Tue, 15 Mar 2022 08:52:21 +0100 [thread overview]
Message-ID: <CAMuHMdUOwVLBLmxaVUO4yADVCf1k7CyhBZiesHx2Fr4LW3QWMQ@mail.gmail.com> (raw)
In-Reply-To: <CAMuHMdVU=JKwEn-=Wf3CYObtaLt2T7NmWrXUwdPHdvNsbgge=g@mail.gmail.com>
On Tue, Mar 15, 2022 at 8:51 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> > Also, when drm_fourcc.h is describing pixel formats, it needs to
> > consider only how a little-endian CPU accesses them. That's how pixel
> > data in memory is described. Display hardware plays no part in that.
> > It is the driver's job to expose the pixel formats that match display
> > hardware behaviour.
>
> But if the "CPU format" does not match the "display support",
s/support/format/
> all pixel data must be converted?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
next prev parent reply other threads:[~2022-03-15 7:52 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 ` [PATCH v2 01/10] drm/fourcc: Add drm_format_info_bpp() helper Geert Uytterhoeven
2022-03-07 20:52 ` 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 [this message]
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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