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From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Thomas Zimmermann <tzimmermann@suse.de>
Cc: javierm@redhat.com, dri-devel@lists.freedesktop.org,
	virtualization@lists.linux-foundation.org, airlied@redhat.com,
	sam@ravnborg.org
Subject: Re: [PATCH 17/17] drm/cirrus: Use VGA macro constants to unblank
Date: Thu, 16 Feb 2023 14:52:51 +0200	[thread overview]
Message-ID: <Y+4nIxRhF7KF2Qo0@intel.com> (raw)
In-Reply-To: <306e110d-4d1f-cb9c-6f9b-c8a5ddd48a61@suse.de>

On Thu, Feb 16, 2023 at 01:03:02PM +0100, Thomas Zimmermann wrote:
> Hi,
> 
> thanks for taking a look at the patches.
> 
> Am 16.02.23 um 12:33 schrieb Gerd Hoffmann:
> > On Wed, Feb 15, 2023 at 05:15:17PM +0100, Thomas Zimmermann wrote:
> >> Set the VGA bit for unblanking with macro constants instead of magic
> >> values. No functional changes.
> > 
> > blank/unblank should work simliar to bochs (see commit 250e743915d4),
> > that is maybe a nice thing to add of you modernize the driver anyway.
> Yeah, it's the VGA PAS field. [1] But is it really called blanking? PAS 
> controls palette access, but blanking is sounds more like DPMS.

Why aren't people just using the normal way of flipping the
screen off bit in sequencer register 01?


> 
> The PAS setting is actually part of the primary plane, so it's current 
> location in the CRTC code is misleading. I didn't want to change the 
> driver logic too much, but I guess I'll fix that in the next iteration.
> 
> Best regards
> Thomas
> 
> [1] 
> https://web.stanford.edu/class/cs140/projects/pintos/specs/freevga/vga/attrreg.htm#3C0
> 
> > 
> > take care,
> >    Gerd
> > 
> 
> -- 
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 Nürnberg, Germany
> (HRB 36809, AG Nürnberg)
> Geschäftsführer: Ivo Totev




-- 
Ville Syrjälä
Intel
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WARNING: multiple messages have this Message-ID (diff)
From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Thomas Zimmermann <tzimmermann@suse.de>
Cc: javierm@redhat.com, dri-devel@lists.freedesktop.org,
	virtualization@lists.linux-foundation.org,
	Gerd Hoffmann <kraxel@redhat.com>,
	airlied@redhat.com, sam@ravnborg.org
Subject: Re: [PATCH 17/17] drm/cirrus: Use VGA macro constants to unblank
Date: Thu, 16 Feb 2023 14:52:51 +0200	[thread overview]
Message-ID: <Y+4nIxRhF7KF2Qo0@intel.com> (raw)
In-Reply-To: <306e110d-4d1f-cb9c-6f9b-c8a5ddd48a61@suse.de>

On Thu, Feb 16, 2023 at 01:03:02PM +0100, Thomas Zimmermann wrote:
> Hi,
> 
> thanks for taking a look at the patches.
> 
> Am 16.02.23 um 12:33 schrieb Gerd Hoffmann:
> > On Wed, Feb 15, 2023 at 05:15:17PM +0100, Thomas Zimmermann wrote:
> >> Set the VGA bit for unblanking with macro constants instead of magic
> >> values. No functional changes.
> > 
> > blank/unblank should work simliar to bochs (see commit 250e743915d4),
> > that is maybe a nice thing to add of you modernize the driver anyway.
> Yeah, it's the VGA PAS field. [1] But is it really called blanking? PAS 
> controls palette access, but blanking is sounds more like DPMS.

Why aren't people just using the normal way of flipping the
screen off bit in sequencer register 01?


> 
> The PAS setting is actually part of the primary plane, so it's current 
> location in the CRTC code is misleading. I didn't want to change the 
> driver logic too much, but I guess I'll fix that in the next iteration.
> 
> Best regards
> Thomas
> 
> [1] 
> https://web.stanford.edu/class/cs140/projects/pintos/specs/freevga/vga/attrreg.htm#3C0
> 
> > 
> > take care,
> >    Gerd
> > 
> 
> -- 
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 Nürnberg, Germany
> (HRB 36809, AG Nürnberg)
> Geschäftsführer: Ivo Totev




-- 
Ville Syrjälä
Intel

  parent reply	other threads:[~2023-02-16 12:53 UTC|newest]

Thread overview: 56+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-15 16:15 [PATCH 00/17] cirrus: Modernize the cirrus driver Thomas Zimmermann
2023-02-15 16:15 ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 01/17] drm/cirrus: Compute blit destination offset in single location Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 02/17] drm/cirrus: Replace cpp value with format Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 03/17] drm/cirrus: Use drm_fb_blit() to update scanout buffer Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 04/17] drm/cirrus: Move drm_dev_{enter, exit}() into DRM helpers Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 05/17] drm/cirrus: Split cirrus_mode_set() into smaller functions Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 06/17] drm/cirrus: Integrate connector into pipeline code Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 07/17] drm/cirrus: Move primary-plane format arrays Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 08/17] drm/cirrus: Convert to regular atomic helpers Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 09/17] drm/cirrus: Enable damage clipping on primary plane Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 10/17] drm/cirrus: Inline cirrus_fb_blit_rect() Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 11/17] drm/cirrus: Remove format test from cirrus_fb_create() Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 12/17] drm/cirrus: Remove size " Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 13/17] drm/cirrus: Test mode against video-memory size in device-wide mode_valid Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 14/17] drm/cirrus: Inline cirrus_check_size() into primary-plane atomic_check Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 15/17] drm/cirrus: Introduce struct cirrus_primary_plane_state Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 16/17] drm/cirrus: Store HW format/pitch in primary-plane state Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-15 16:15 ` [PATCH 17/17] drm/cirrus: Use VGA macro constants to unblank Thomas Zimmermann
2023-02-15 16:15   ` Thomas Zimmermann
2023-02-16 11:33   ` Gerd Hoffmann
2023-02-16 11:33     ` Gerd Hoffmann
2023-02-16 12:03     ` Thomas Zimmermann
2023-02-16 12:03       ` Thomas Zimmermann
2023-02-16 12:33       ` Gerd Hoffmann
2023-02-16 12:33         ` Gerd Hoffmann
2023-02-16 12:52       ` Ville Syrjälä [this message]
2023-02-16 12:52         ` Ville Syrjälä
2023-02-16 13:19         ` Gerd Hoffmann
2023-02-16 13:19           ` Gerd Hoffmann
2023-02-16 13:21         ` Thomas Zimmermann
2023-02-16 13:21           ` Thomas Zimmermann
2023-02-16 17:20           ` Ville Syrjälä
2023-02-16 17:20             ` Ville Syrjälä
2023-02-17  8:23             ` Thomas Zimmermann
2023-02-17  8:23               ` Thomas Zimmermann
2023-02-20 14:22     ` Thomas Zimmermann
2023-02-20 14:22       ` Thomas Zimmermann
2023-02-20 15:39       ` Gerd Hoffmann
2023-02-20 15:39         ` Gerd Hoffmann

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