linux-kernel - Re: [PATCH] drm/qxl: fix cursor position with non-zero hotspot

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Message-ID: <20160208113232.02bc534a.john@metanate.com>
Date:	Mon, 8 Feb 2016 11:32:32 +0000
From:	John Keeping <john@...anate.com>
To:	Dave Airlie <airlied@...il.com>
Cc:	Daniel Vetter <daniel@...ll.ch>,
	Maling list - DRI developers 
	<dri-devel@...ts.freedesktop.org>,
	Michel Dänzer <michel.daenzer@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/qxl: fix cursor position with non-zero hotspot

I haven't seen this get picked up.  Is there something wrong with the
patch or was it just lost in the noise?

On Thu, 3 Dec 2015 10:46:07 +0000 John Keeping wrote:

> On Wed, 18 Nov 2015 13:58:23 +0100, Daniel Vetter wrote:
> 
> > On Wed, Nov 18, 2015 at 11:17:25AM +0000, John Keeping wrote:  
> > > The SPICE protocol considers the position of a cursor to be the
> > > location of its active pixel on the display, so the cursor is drawn
> > > with its top-left corner at "(x - hot_spot_x, y - hot_spot_y)" but
> > > the DRM cursor position gives the location where the top-left
> > > corner should be drawn, with the hotspot being a hint for drivers
> > > that need it.
> > > 
> > > This fixes the location of the window resize cursors when using
> > > Fluxbox with the QXL DRM driver and both the QXL and modesetting X
> > > drivers.
> > > 
> > > Signed-off-by: John Keeping <john@...anate.com>
> > > ---
> > > This comes from the discussion in the thread at [1].  My test
> > > environment is using:
> > > 
> > >     - X.Org X Server 1.17.4
> > >     - xf86-video-qxl 0.1.4
> > >     - spice-gtk3 0.30
> > > 
> > > [1]
> > > http://lists.freedesktop.org/archives/dri-devel/2015-November/thread.html#94650
> > > 
> > >  drivers/gpu/drm/qxl/qxl_display.c | 13 +++++++++----
> > >  drivers/gpu/drm/qxl/qxl_drv.h     |  2 ++
> > >  2 files changed, 11 insertions(+), 4 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/qxl/qxl_display.c
> > > b/drivers/gpu/drm/qxl/qxl_display.c index 183aea1..5edebf4 100644
> > > --- a/drivers/gpu/drm/qxl/qxl_display.c
> > > +++ b/drivers/gpu/drm/qxl/qxl_display.c
> > > @@ -375,10 +375,15 @@ static int qxl_crtc_cursor_set2(struct
> > > drm_crtc *crtc, 
> > >  	qxl_bo_kunmap(user_bo);
> > >  
> > > +	qcrtc->cur_x += qcrtc->hot_spot_x - hot_x;
> > > +	qcrtc->cur_y += qcrtc->hot_spot_y - hot_y;
> > > +	qcrtc->hot_spot_x = hot_x;
> > > +	qcrtc->hot_spot_y = hot_y;    
> > 
> > Yay for the artificial split of the legacy driver interface for
> > cursors.
> > 
> > Reviewed-by: Daniel Vetter <daniel.vetter@...ll.ch>
> > Cc: stable@...r.kernel.org
> > 
> > Dave, can you pls pick this up if you agree?  
> 
> Ping?
> 
> > > +
> > >  	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev,
> > > release); cmd->type = QXL_CURSOR_SET;
> > > -	cmd->u.set.position.x = qcrtc->cur_x;
> > > -	cmd->u.set.position.y = qcrtc->cur_y;
> > > +	cmd->u.set.position.x = qcrtc->cur_x + qcrtc->hot_spot_x;
> > > +	cmd->u.set.position.y = qcrtc->cur_y + qcrtc->hot_spot_y;
> > >  
> > >  	cmd->u.set.shape = qxl_bo_physical_address(qdev,
> > > cursor_bo, 0); 
> > > @@ -441,8 +446,8 @@ static int qxl_crtc_cursor_move(struct drm_crtc
> > > *crtc, 
> > >  	cmd = (struct qxl_cursor_cmd *)qxl_release_map(qdev,
> > > release); cmd->type = QXL_CURSOR_MOVE;
> > > -	cmd->u.position.x = qcrtc->cur_x;
> > > -	cmd->u.position.y = qcrtc->cur_y;
> > > +	cmd->u.position.x = qcrtc->cur_x + qcrtc->hot_spot_x;
> > > +	cmd->u.position.y = qcrtc->cur_y + qcrtc->hot_spot_y;
> > >  	qxl_release_unmap(qdev, release, &cmd->release_info);
> > >  
> > >  	qxl_push_cursor_ring_release(qdev, release,
> > > QXL_CMD_CURSOR, false); diff --git a/drivers/gpu/drm/qxl/qxl_drv.h
> > > b/drivers/gpu/drm/qxl/qxl_drv.h index 01a8694..3ab9017 100644
> > > --- a/drivers/gpu/drm/qxl/qxl_drv.h
> > > +++ b/drivers/gpu/drm/qxl/qxl_drv.h
> > > @@ -135,6 +135,8 @@ struct qxl_crtc {
> > >  	int index;
> > >  	int cur_x;
> > >  	int cur_y;
> > > +	int hot_spot_x;
> > > +	int hot_spot_y;
> > >  };
> > >  
> > >  struct qxl_output {
> > > -- 
> > > 2.6.3.462.gbe2c914
> > >     
> >