Re: [PATCH 03/23] drm/i915: Don't use struct drm_driver.get_scanout_position()

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Fri, Jan 10, 2020 at 03:56:06PM +0200, Jani Nikula wrote:
> On Fri, 10 Jan 2020, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> > Hi
> >
> > Am 10.01.20 um 12:59 schrieb Jani Nikula:
> >> On Fri, 10 Jan 2020, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> >>> The callback struct drm_driver.get_scanout_position() is deprecated in
> >>> favor of struct drm_crtc_helper_funcs.get_scanout_position().
> >>>
> >>> i915 doesn't use CRTC helpers. The patch duplicates the caller
> >>> drm_calc_vbltimestamp_from_scanoutpos() for i915, such that the callback
> >>> function is not needed.
> >>>
> >>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> >>> ---
> >>>  drivers/gpu/drm/i915/i915_drv.c |   3 +-
> >>>  drivers/gpu/drm/i915/i915_irq.c | 117 ++++++++++++++++++++++++++++++--
> >>>  drivers/gpu/drm/i915/i915_irq.h |   9 +--
> >>>  3 files changed, 119 insertions(+), 10 deletions(-)
> >> 
> >> Not really enthusiastic about the diffstat in a "cleanup" series.
> >
> > Well, the cleanup is about the content of drm_driver :)
> >
> >> 
> >> I wonder if you could add a generic helper version of
> >> drm_calc_vbltimestamp_from_scanoutpos where you pass the
> >> get_scanout_position function as a parameter. Both
> >> drm_calc_vbltimestamp_from_scanoutpos and the new
> >> i915_calc_vbltimestamp_from_scanoutpos would then be fairly thin
> >> wrappers passing in the relevant get_scanout_position function.
> >
> > Of course. Will be in v2 of the series.
> 
> Please give Ville (Cc'd) a moment before sending v2 in case he wants to
> chime in on this.

Passing the function pointer was one option I considered for this a while
back. Can't remeber what other solutions I condsidered. But I guess I
didn't like any of them enough to make an actual patch.

-- 
Ville Syrjälä
Intel
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