xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dmaengine: tegra: add tracepoints to driver

Browse Source 
Add some trace-points to the driver to allow for debuging via the
trace pipe.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Ben Dooks
2018-11-21 16:13:23 +00:00
committed by Vinod Koul
parent 65c383c780
commit 95f295f9fe
2 changed files with 68 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/dma/tegra20-apb-dma.c
View File

@@ -38,6 +38,9 @@
#include "dmaengine.h"
#define CREATE_TRACE_POINTS
#include <trace/events/tegra_apb_dma.h>
#define TEGRA_APBDMA_GENERAL 0x0
#define TEGRA_APBDMA_GENERAL_ENABLE BIT(31)
@@ -672,6 +675,8 @@ static void tegra_dma_tasklet(unsigned long data)
dmaengine_desc_get_callback(&dma_desc->txd, &cb);
cb_count = dma_desc->cb_count;
dma_desc->cb_count = 0;
trace_tegra_dma_complete_cb(&tdc->dma_chan, cb_count,
cb.callback);
spin_unlock_irqrestore(&tdc->lock, flags);
while (cb_count--)
dmaengine_desc_callback_invoke(&cb, NULL);
@@ -688,6 +693,7 @@ static irqreturn_t tegra_dma_isr(int irq, void *dev_id)
spin_lock_irqsave(&tdc->lock, flags);
trace_tegra_dma_isr(&tdc->dma_chan, irq);
status = tdc_read(tdc, TEGRA_APBDMA_CHAN_STATUS);
if (status & TEGRA_APBDMA_STATUS_ISE_EOC) {
tdc_write(tdc, TEGRA_APBDMA_CHAN_STATUS, status);
@@ -846,6 +852,7 @@ found:
dma_set_residue(txstate, residual);
}
trace_tegra_dma_tx_status(&tdc->dma_chan, cookie, txstate);
spin_unlock_irqrestore(&tdc->lock, flags);
return ret;
}