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From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>,
	Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	Thierry Reding <treding@nvidia.com>,
	Peter Rosin <peda@axentia.se>,
	DRI Development <dri-devel@lists.freedesktop.org>
Subject: Re: [PATCH 09/13] drm/fb-helper: Split dpms handling into legacy and atomic paths
Date: Thu, 29 Jun 2017 12:31:09 +0200	[thread overview]
Message-ID: <CAKMK7uHZqPd0MbnNx+5pvwQjw1ejY2Z8wiOn84qnLnXaJxsgow@mail.gmail.com> (raw)
In-Reply-To: <28764010-74e0-5049-ee9c-9ddc944efb20@linux.intel.com>

On Thu, Jun 29, 2017 at 12:22 PM, Maarten Lankhorst
<maarten.lankhorst@linux.intel.com> wrote:
>> +static void dpms_atomic(struct drm_fb_helper *fb_helper, int dpms_mode)
>> +{
>> +     struct drm_device *dev = fb_helper->dev;
>> +     struct drm_atomic_state *state;
>> +     int i, ret;
>> +
>> +     struct drm_modeset_acquire_ctx ctx;
>> +
>> +     drm_modeset_acquire_init(&ctx, 0);
>> +
>> +     state = drm_atomic_state_alloc(dev);
>> +     if (!state) {
>> +             ret = -ENOMEM;
>> +             goto out_ctx;
>> +     }
>> +
>> +     state->acquire_ctx = &ctx;
>> +retry:
>> +     for (i = 0; i < fb_helper->crtc_count; i++) {
>> +             struct drm_crtc_state *crtc_state;
>> +             struct drm_crtc *crtc;
>> +
>> +             if (!fb_helper->crtc_info[i].mode_set.mode)
>> +                     continue;
>> +
>> +             crtc = fb_helper->crtc_info[i].mode_set.crtc;
>> +
>> +             crtc_state = drm_atomic_get_crtc_state(state, crtc);
>> +             if (IS_ERR(crtc_state)) {
>> +                     ret = PTR_ERR(crtc_state);
>> +                     goto out_state;
>> +             }
> Hm, maybe remove the early continue, and change this to if (crtc_state->enable) crtc_state->active = ...; ?
>
> I don't know if it matters in practice, but it might be more resilient when crtc state does not match our expected state,
> similar to how DPMS on is ignored without CRTC.

I just blindly smashed the old fbdev code in with the helper and moved
the locking out. Not sure what would be better here, since the
continue is in a way just part of a non-existent
drm_fb_helper_for_each_active_crtc loop iterator. Not sure it's worth
it to overpolish this code to such an extent :-)
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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Intel-gfx@lists.freedesktop.org
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  reply	other threads:[~2017-06-29 10:31 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-27 14:59 [PATCH 00/13] fbdev locking rework and deferred setup, take 2 Daniel Vetter
2017-06-27 14:59 ` [PATCH 01/13] drm/fb-helper: Push down modeset lock into FB helpers Daniel Vetter
2017-06-29  9:10   ` Maarten Lankhorst
2017-06-29  9:23     ` Daniel Vetter
2017-06-29  9:33       ` Maarten Lankhorst
2017-06-29  9:44         ` Daniel Vetter
2017-06-29 11:13           ` Maarten Lankhorst
2017-06-29 12:38             ` Daniel Vetter
2017-06-27 14:59 ` [PATCH 02/13] drm/i915: Drop FBDEV #ifdev in mst code Daniel Vetter
2017-06-27 14:59 ` [PATCH 03/13] drm/fb-helper: Add top-level lock Daniel Vetter
2017-06-27 14:59 ` [PATCH 04/13] drm/fb-helper: Push locking in fb_is_bound Daniel Vetter
2017-06-27 14:59 ` [PATCH 05/13] drm/fb-helper: Drop locking from the vsync wait ioctl code Daniel Vetter
2017-06-27 14:59 ` [PATCH 06/13] drm/fb-helper: Push locking into pan_display_atomic|legacy Daniel Vetter
2017-06-27 14:59 ` [PATCH 07/13] drm/fb-helper: Push locking into restore_fbdev_mode_atomic|legacy Daniel Vetter
2017-06-27 14:59 ` [PATCH 08/13] drm/fb-helper: Stop using mode_config.mutex for internals Daniel Vetter
2017-06-27 14:59 ` [PATCH 09/13] drm/fb-helper: Split dpms handling into legacy and atomic paths Daniel Vetter
2017-06-29 10:22   ` Maarten Lankhorst
2017-06-29 10:31     ` Daniel Vetter [this message]
2017-06-29 10:58       ` Maarten Lankhorst
2017-06-29 11:00         ` Daniel Vetter
2017-06-29 11:23           ` Maarten Lankhorst
2017-06-27 14:59 ` [PATCH 10/13] drm/fb-helper: Support deferred setup Daniel Vetter
2017-06-28 11:32   ` [PATCH] " Daniel Vetter
2017-06-28 16:24     ` Liviu Dudau
2017-06-29 10:59     ` Maarten Lankhorst
2017-06-29 12:36       ` Daniel Vetter
2017-06-30 16:51     ` [PATCH] drm/fb-helper: Restore first connection behaviour on " Liviu Dudau
2017-06-30 18:13       ` Daniel Vetter
2017-07-03  8:44         ` Liviu Dudau
2017-07-03 16:33           ` Daniel Vetter
2017-06-27 14:59 ` [PATCH 11/13] drm/exynos: Remove custom FB helper " Daniel Vetter
2017-06-27 14:59 ` [PATCH 12/13] drm/hisilicon: " Daniel Vetter
2017-06-28  9:08   ` [PATCH] " Daniel Vetter
2017-06-27 14:59 ` [PATCH 13/13] drm/atomic-helper: Realign function parameters Daniel Vetter
2017-06-27 15:01   ` Deucher, Alexander
2017-06-27 15:42   ` Harry Wentland
2017-07-04 15:16     ` Daniel Vetter
2017-06-27 15:30 ` ✓ Fi.CI.BAT: success for fbdev locking rework and deferred setup, take 2 Patchwork
2017-06-27 23:02 ` [PATCH 00/13] " John Stultz
2017-06-28  7:36   ` Daniel Vetter
2017-06-28  9:28 ` ✓ Fi.CI.BAT: success for fbdev locking rework and deferred setup, take 2 (rev2) Patchwork
2017-06-28 12:28 ` ✓ Fi.CI.BAT: success for fbdev locking rework and deferred setup, take 2 (rev3) Patchwork
2017-07-04 15:18 [PATCH 00/13] fbdev locking + deferred setup take 3 Daniel Vetter
2017-07-04 15:18 ` [PATCH 09/13] drm/fb-helper: Split dpms handling into legacy and atomic paths Daniel Vetter

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