diff options
| author | Maxime Ripard <maxime@cerno.tech> | 2020-12-04 16:11:34 +0100 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2020-12-15 11:33:29 +0100 |
| commit | d62a8ed7671ee1deaabe339df3703f8dff56183b (patch) | |
| tree | 8fe5eb210f790c1fe1e0693db47c1ce8cf49e6b9 /drivers/gpu/drm/vc4/vc4_kms.c | |
| parent | 27125e86b797deea4c42dc35fb0a71fd1d5ae53a (diff) | |
drm/vc4: Simplify a bit the global atomic_check
When we can't allocate a new channel, we can simply return instead of
having to handle both cases, and that simplifies a bit the code.
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20201204151138.1739736-4-maxime@cerno.tech
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_kms.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_kms.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c index ba310c0ab5f6..8937eb0b751d 100644 --- a/drivers/gpu/drm/vc4/vc4_kms.c +++ b/drivers/gpu/drm/vc4/vc4_kms.c @@ -794,6 +794,7 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, to_vc4_crtc_state(new_crtc_state); struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); unsigned int matching_channels; + unsigned int channel; /* Nothing to do here, let's skip it */ if (old_crtc_state->enable == new_crtc_state->enable) @@ -834,14 +835,12 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, * but it works so far. */ matching_channels = hvs_new_state->unassigned_channels & vc4_crtc->data->hvs_available_channels; - if (matching_channels) { - unsigned int channel = ffs(matching_channels) - 1; - - new_vc4_crtc_state->assigned_channel = channel; - hvs_new_state->unassigned_channels &= ~BIT(channel); - } else { + if (!matching_channels) return -EINVAL; - } + + channel = ffs(matching_channels) - 1; + new_vc4_crtc_state->assigned_channel = channel; + hvs_new_state->unassigned_channels &= ~BIT(channel); } return 0; |