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From: Pekka Paalanen <ppaalanen@gmail.com>
To: Hector Martin <marcan@marcan.st>
Cc: Thomas Zimmermann <tzimmermann@suse.de>,
	David Airlie <airlied@linux.ie>,
	linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
	Alyssa Rosenzweig <alyssa@rosenzweig.io>
Subject: Re: [PATCH 2/3] drm/format-helper: Add drm_fb_xrgb8888_to_xrgb2101010_dstclip()
Date: Mon, 22 Nov 2021 11:52:47 +0200	[thread overview]
Message-ID: <20211122115247.257f30fa@eldfell> (raw)
In-Reply-To: <20211117145829.204360-3-marcan@marcan.st>

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On Wed, 17 Nov 2021 23:58:28 +0900
Hector Martin <marcan@marcan.st> wrote:

> Add XRGB8888 emulation support for devices that can only do XRGB2101010.
> 
> This is chiefly useful for simpledrm on Apple devices where the
> bootloader-provided framebuffer is 10-bit, which already works fine with
> simplefb. This is required to make simpledrm support this too.
> 
> Signed-off-by: Hector Martin <marcan@marcan.st>
> ---
>  drivers/gpu/drm/drm_format_helper.c | 64 +++++++++++++++++++++++++++++
>  include/drm/drm_format_helper.h     |  4 ++
>  2 files changed, 68 insertions(+)

Hi Hector,

I'm curious, since the bootloader seems to always set up a 10-bit mode,
is there a reason for it that you can guess? Is the monitor in WCG or
even HDR mode?


Thanks,
pq

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WARNING: multiple messages have this Message-ID (diff)
From: Pekka Paalanen <ppaalanen@gmail.com>
To: Hector Martin <marcan@marcan.st>
Cc: 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>,
	dri-devel@lists.freedesktop.org,
	Alyssa Rosenzweig <alyssa@rosenzweig.io>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/3] drm/format-helper: Add drm_fb_xrgb8888_to_xrgb2101010_dstclip()
Date: Mon, 22 Nov 2021 11:52:47 +0200	[thread overview]
Message-ID: <20211122115247.257f30fa@eldfell> (raw)
In-Reply-To: <20211117145829.204360-3-marcan@marcan.st>

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On Wed, 17 Nov 2021 23:58:28 +0900
Hector Martin <marcan@marcan.st> wrote:

> Add XRGB8888 emulation support for devices that can only do XRGB2101010.
> 
> This is chiefly useful for simpledrm on Apple devices where the
> bootloader-provided framebuffer is 10-bit, which already works fine with
> simplefb. This is required to make simpledrm support this too.
> 
> Signed-off-by: Hector Martin <marcan@marcan.st>
> ---
>  drivers/gpu/drm/drm_format_helper.c | 64 +++++++++++++++++++++++++++++
>  include/drm/drm_format_helper.h     |  4 ++
>  2 files changed, 68 insertions(+)

Hi Hector,

I'm curious, since the bootloader seems to always set up a 10-bit mode,
is there a reason for it that you can guess? Is the monitor in WCG or
even HDR mode?


Thanks,
pq

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  parent reply	other threads:[~2021-11-22  9:52 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-17 14:58 [PATCH 0/3] drm/simpledrm: Apple M1 / DT platform support fixes Hector Martin
2021-11-17 14:58 ` Hector Martin
2021-11-17 14:58 ` [PATCH 1/3] drm/simpledrm: Bind to OF framebuffers in /chosen Hector Martin
2021-11-17 14:58   ` Hector Martin
2021-11-18  9:19   ` Thomas Zimmermann
2021-11-18  9:19     ` Thomas Zimmermann
2021-11-20  3:23     ` Hector Martin
2021-11-20  3:23       ` Hector Martin
2021-11-29 11:26       ` Thomas Zimmermann
2021-11-29 11:26         ` Thomas Zimmermann
2021-11-29 19:29       ` Rob Herring
2021-11-29 19:29         ` Rob Herring
2021-11-30  6:44         ` Javier Martinez Canillas
2021-11-30  6:44           ` Javier Martinez Canillas
2021-11-30  8:31           ` Thomas Zimmermann
2021-11-30  8:31             ` Thomas Zimmermann
2021-11-30  9:31             ` Javier Martinez Canillas
2021-11-30  9:31               ` Javier Martinez Canillas
2021-11-30 18:25           ` Rob Herring
2021-11-30 18:25             ` Rob Herring
2021-11-19  1:21   ` kernel test robot
2021-11-19  1:21     ` kernel test robot
2021-11-17 14:58 ` [PATCH 2/3] drm/format-helper: Add drm_fb_xrgb8888_to_xrgb2101010_dstclip() Hector Martin
2021-11-17 14:58   ` Hector Martin
2021-11-18  9:16   ` Thomas Zimmermann
2021-11-18  9:16     ` Thomas Zimmermann
2021-11-22  9:52   ` Pekka Paalanen [this message]
2021-11-22  9:52     ` Pekka Paalanen
2021-11-22 10:05     ` Hector Martin
2021-11-22 10:05       ` Hector Martin
2021-11-22 10:39       ` Pekka Paalanen
2021-11-22 10:39         ` Pekka Paalanen
2021-11-17 14:58 ` [PATCH 3/3] drm/simpledrm: Enable XRGB2101010 format Hector Martin
2021-11-17 14:58   ` Hector Martin
2021-11-18  9:16   ` Thomas Zimmermann
2021-11-18  9:16     ` Thomas Zimmermann

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