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drm/vc4: kms: Remove unassigned_channels from the HVS state

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The HVS state now has both unassigned_channels that reflects the
channels that are not used in the associated state, and the in_use
boolean for each channel that says whether or not a particular channel
is in use.

Both express pretty much the same thing, and we need the in_use variable
to properly track the commits, so let's get rid of unassigned_channels.

Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20201204151138.1739736-6-maxime@cerno.tech
This commit is contained in:
Maxime Ripard 2020-12-04 16:11:36 +01:00
parent 9ec03d7f1e
commit 03b03efebe
No known key found for this signature in database
GPG Key ID: E3EF0D6F671851C5
1 changed files with 7 additions and 7 deletions
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14
drivers/gpu/drm/vc4/vc4_kms.c
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@ -39,7 +39,6 @@ static struct vc4_ctm_state *to_vc4_ctm_state(struct drm_private_state *priv)
struct vc4_hvs_state {
struct drm_private_state base;
unsigned int unassigned_channels;
struct {
unsigned in_use: 1;
@ -798,7 +797,6 @@ vc4_hvs_channels_duplicate_state(struct drm_private_obj *obj)
__drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
state->unassigned_channels = old_state->unassigned_channels;
for (i = 0; i < HVS_NUM_CHANNELS; i++) {
state->fifo_state[i].in_use = old_state->fifo_state[i].in_use;
@ -849,7 +847,6 @@ static int vc4_hvs_channels_obj_init(struct vc4_dev *vc4)
if (!state)
return -ENOMEM;
state->unassigned_channels = GENMASK(HVS_NUM_CHANNELS - 1, 0);
drm_atomic_private_obj_init(&vc4->base, &vc4->hvs_channels,
&state->base,
&vc4_hvs_state_funcs);
@ -893,12 +890,17 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev,
struct vc4_hvs_state *hvs_new_state;
struct drm_crtc_state *old_crtc_state, *new_crtc_state;
struct drm_crtc *crtc;
unsigned int unassigned_channels = 0;
unsigned int i;
hvs_new_state = vc4_hvs_get_global_state(state);
if (!hvs_new_state)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(hvs_new_state->fifo_state); i++)
if (!hvs_new_state->fifo_state[i].in_use)
unassigned_channels |= BIT(i);
for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
struct vc4_crtc_state *old_vc4_crtc_state =
to_vc4_crtc_state(old_crtc_state);
@ -918,8 +920,6 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev,
/* If we're disabling our CRTC, we put back our channel */
if (!new_crtc_state->enable) {
channel = old_vc4_crtc_state->assigned_channel;
hvs_new_state->unassigned_channels |= BIT(channel);
hvs_new_state->fifo_state[channel].in_use = false;
new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED;
continue;
@ -949,13 +949,13 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev,
* the future, we will need to have something smarter,
* but it works so far.
*/
matching_channels = hvs_new_state->unassigned_channels & vc4_crtc->data->hvs_available_channels;
matching_channels = unassigned_channels & vc4_crtc->data->hvs_available_channels;
if (!matching_channels)
return -EINVAL;
channel = ffs(matching_channels) - 1;
new_vc4_crtc_state->assigned_channel = channel;
hvs_new_state->unassigned_channels &= ~BIT(channel);
unassigned_channels &= ~BIT(channel);
hvs_new_state->fifo_state[channel].in_use = true;
}