diff options
| author | Maxime Ripard <maxime@cerno.tech> | 2022-03-28 17:36:59 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2022-04-08 13:38:07 +0200 |
| commit | 3870b54e0684a17ac95ae7ec8fffbcb6357731ea (patch) | |
| tree | 11723da51be3723c894b803cf5ba906e2e00a814 /drivers/gpu/drm/vc4/vc4_kms.c | |
| parent | 457e5184b9e0e14b26044c7fed5940bcbe7698a7 (diff) | |
drm/vc4: kms: Improve logging
When debugging, finding out what muxing decisions were made and what the
actual core clock rate is is always useful, so let's add some more
messages.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20220328153659.2382206-7-maxime@cerno.tech
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_kms.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_kms.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_kms.c b/drivers/gpu/drm/vc4/vc4_kms.c index ffd54aab7759..c169bd72e53b 100644 --- a/drivers/gpu/drm/vc4/vc4_kms.c +++ b/drivers/gpu/drm/vc4/vc4_kms.c @@ -439,6 +439,9 @@ static void vc4_atomic_commit_tail(struct drm_atomic_state *state) * requirements. */ clk_set_min_rate(hvs->core_clk, new_hvs_state->core_clock_rate); + + drm_dbg(dev, "Core clock actual rate: %lu Hz\n", + clk_get_rate(hvs->core_clk)); } } @@ -822,9 +825,18 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, unsigned int matching_channels; unsigned int channel; + drm_dbg(dev, "%s: Trying to find a channel.\n", crtc->name); + /* Nothing to do here, let's skip it */ - if (old_crtc_state->enable == new_crtc_state->enable) + if (old_crtc_state->enable == new_crtc_state->enable) { + if (new_crtc_state->enable) + drm_dbg(dev, "%s: Already enabled, reusing channel %d.\n", + crtc->name, new_vc4_crtc_state->assigned_channel); + else + drm_dbg(dev, "%s: Disabled, ignoring.\n", crtc->name); + continue; + } /* Muxing will need to be modified, mark it as such */ new_vc4_crtc_state->update_muxing = true; @@ -832,6 +844,10 @@ 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; + + drm_dbg(dev, "%s: Disabling, Freeing channel %d\n", + crtc->name, channel); + hvs_new_state->fifo_state[channel].in_use = false; new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED; continue; @@ -866,6 +882,8 @@ static int vc4_pv_muxing_atomic_check(struct drm_device *dev, return -EINVAL; channel = ffs(matching_channels) - 1; + + drm_dbg(dev, "Assigned HVS channel %d to CRTC %s\n", channel, crtc->name); new_vc4_crtc_state->assigned_channel = channel; unassigned_channels &= ~BIT(channel); hvs_new_state->fifo_state[channel].in_use = true; |