diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0758-drm-vc4-kms-Improve-logging.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0758-drm-vc4-kms-Improve-logging.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0758-drm-vc4-kms-Improve-logging.patch b/target/linux/bcm27xx/patches-5.15/950-0758-drm-vc4-kms-Improve-logging.patch new file mode 100644 index 0000000000..d6ff838130 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0758-drm-vc4-kms-Improve-logging.patch @@ -0,0 +1,66 @@ +From 0fc2455e0b6cf188c529915de2627bdfb3e5ff01 Mon Sep 17 00:00:00 2001 +From: Maxime Ripard <maxime@cerno.tech> +Date: Fri, 4 Mar 2022 15:59:40 +0100 +Subject: [PATCH] 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> +--- + drivers/gpu/drm/vc4/vc4_kms.c | 20 +++++++++++++++++++- + 1 file changed, 19 insertions(+), 1 deletion(-) + +--- a/drivers/gpu/drm/vc4/vc4_kms.c ++++ b/drivers/gpu/drm/vc4/vc4_kms.c +@@ -447,6 +447,9 @@ static void vc4_atomic_commit_tail(struc + + /* And drop the temporary request */ + clk_request_done(core_req); ++ ++ drm_dbg(dev, "Core clock actual rate: %lu Hz\n", ++ clk_get_rate(hvs->core_clk)); + } + } + +@@ -827,9 +830,18 @@ static int vc4_pv_muxing_atomic_check(st + if (vc4->firmware_kms) + continue; + ++ 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; +@@ -837,6 +849,10 @@ static int vc4_pv_muxing_atomic_check(st + /* 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; +@@ -871,6 +887,8 @@ static int vc4_pv_muxing_atomic_check(st + 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; |