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67 lines
2.2 KiB
Diff
67 lines
2.2 KiB
Diff
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From 0fc2455e0b6cf188c529915de2627bdfb3e5ff01 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Fri, 4 Mar 2022 15:59:40 +0100
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Subject: [PATCH] drm/vc4: kms: Improve logging
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When debugging, finding out what muxing decisions were made and what the
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actual core clock rate is is always useful, so let's add some more
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messages.
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_kms.c | 20 +++++++++++++++++++-
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1 file changed, 19 insertions(+), 1 deletion(-)
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--- a/drivers/gpu/drm/vc4/vc4_kms.c
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+++ b/drivers/gpu/drm/vc4/vc4_kms.c
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@@ -447,6 +447,9 @@ static void vc4_atomic_commit_tail(struc
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/* And drop the temporary request */
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clk_request_done(core_req);
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+
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+ drm_dbg(dev, "Core clock actual rate: %lu Hz\n",
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+ clk_get_rate(hvs->core_clk));
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}
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}
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@@ -827,9 +830,18 @@ static int vc4_pv_muxing_atomic_check(st
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if (vc4->firmware_kms)
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continue;
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+ drm_dbg(dev, "%s: Trying to find a channel.\n", crtc->name);
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+
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/* Nothing to do here, let's skip it */
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- if (old_crtc_state->enable == new_crtc_state->enable)
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+ if (old_crtc_state->enable == new_crtc_state->enable) {
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+ if (new_crtc_state->enable)
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+ drm_dbg(dev, "%s: Already enabled, reusing channel %d.\n",
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+ crtc->name, new_vc4_crtc_state->assigned_channel);
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+ else
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+ drm_dbg(dev, "%s: Disabled, ignoring.\n", crtc->name);
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+
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continue;
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+ }
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/* Muxing will need to be modified, mark it as such */
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new_vc4_crtc_state->update_muxing = true;
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@@ -837,6 +849,10 @@ static int vc4_pv_muxing_atomic_check(st
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/* If we're disabling our CRTC, we put back our channel */
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if (!new_crtc_state->enable) {
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channel = old_vc4_crtc_state->assigned_channel;
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+
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+ drm_dbg(dev, "%s: Disabling, Freeing channel %d\n",
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+ crtc->name, channel);
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+
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hvs_new_state->fifo_state[channel].in_use = false;
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new_vc4_crtc_state->assigned_channel = VC4_HVS_CHANNEL_DISABLED;
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continue;
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@@ -871,6 +887,8 @@ static int vc4_pv_muxing_atomic_check(st
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return -EINVAL;
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channel = ffs(matching_channels) - 1;
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+
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+ drm_dbg(dev, "Assigned HVS channel %d to CRTC %s\n", channel, crtc->name);
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new_vc4_crtc_state->assigned_channel = channel;
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unassigned_channels &= ~BIT(channel);
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hvs_new_state->fifo_state[channel].in_use = true;
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