linux-kernel - [PATCH v2 3/4] drm/etnaviv: show loadavg in debugfs

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Message-Id: <20220621072050.76229-4-christian.gmeiner@gmail.com>
Date:   Tue, 21 Jun 2022 09:20:49 +0200
From:   Christian Gmeiner <christian.gmeiner@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     Christian Gmeiner <christian.gmeiner@...il.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Russell King <linux+etnaviv@...linux.org.uk>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        etnaviv@...ts.freedesktop.org (moderated list:DRM DRIVERS FOR VIVANTE
        GPU IP),
        dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS FOR VIVANTE GPU
        IP)
Subject: [PATCH v2 3/4] drm/etnaviv: show loadavg in debugfs

Might be helpful to see the loadavg in debugfs.

Signed-off-by: Christian Gmeiner <christian.gmeiner@...il.com>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 202002ae75ee..113faff9b02e 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -926,7 +926,7 @@ int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
 {
 	struct dma_debug debug;
 	u32 dma_lo, dma_hi, axi, idle;
-	int ret;
+	int ret, i;
 
 	seq_printf(m, "%s Status:\n", dev_name(gpu->dev));
 
@@ -1044,6 +1044,16 @@ int etnaviv_gpu_debugfs(struct etnaviv_gpu *gpu, struct seq_file *m)
 	if (idle & VIVS_HI_IDLE_STATE_AXI_LP)
 		seq_puts(m, "\t AXI low power mode\n");
 
+	seq_printf(m, "\tload:\n");
+	spin_lock_bh(&gpu->loadavg_spinlock);
+
+	for (i = 0; i < ARRAY_SIZE(etna_idle_module_names); i++)
+		seq_printf(m, "\t %s: %u%%\n",
+				  etna_idle_module_names[i].name,
+				  gpu->loadavg_percentage[i]);
+
+	spin_unlock_bh(&gpu->loadavg_spinlock);
+
 	if (gpu->identity.features & chipFeatures_DEBUG_MODE) {
 		u32 read0 = gpu_read(gpu, VIVS_MC_DEBUG_READ0);
 		u32 read1 = gpu_read(gpu, VIVS_MC_DEBUG_READ1);
-- 
2.36.1