1a33e83e63
Changes:
surface3-spi:
- Dropped this patch in favor of the surface3-touchscreen-dma-fix
patch (which is taken from the upstream DMA fix). For details, take
a look at the commit history of kernel repo linked below.
surface3-touchscreen-dma-fix:
- Added this patch as a successor to the dropped surface3-spi patch.
For details, take a look at the commit history of kernel repo linked
below.
Note: currently, this patch is available upstream only on v5.8,
v5.7, and v5.4 and not backported to any older LTS kernels. So,
this patch was backported from upstream commit ourselves.
Links:
- kernel: 94678ca738
Signed-off-by: Tsuchiya Yuto <kitakar@gmail.com>
64 lines
1.9 KiB
Diff
64 lines
1.9 KiB
Diff
From 4522b91327647286e77ed42decfd787682b59d26 Mon Sep 17 00:00:00 2001
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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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Date: Sun, 5 Jul 2020 14:56:20 +0300
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Subject: [PATCH 2/8] surface3-touchscreen-dma-fix
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---
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drivers/dma/dw/core.c | 12 ------------
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1 file changed, 12 deletions(-)
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diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
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index 055d83b6cb68..acf64302a2b2 100644
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--- a/drivers/dma/dw/core.c
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+++ b/drivers/dma/dw/core.c
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@@ -180,9 +180,6 @@ static void dwc_initialize(struct dw_dma_chan *dwc)
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{
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struct dw_dma *dw = to_dw_dma(dwc->chan.device);
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- if (test_bit(DW_DMA_IS_INITIALIZED, &dwc->flags))
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- return;
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-
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if (dw->pdata->is_idma32)
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dwc_initialize_chan_idma32(dwc);
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else
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@@ -191,8 +188,6 @@ static void dwc_initialize(struct dw_dma_chan *dwc)
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/* Enable interrupts */
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channel_set_bit(dw, MASK.XFER, dwc->mask);
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channel_set_bit(dw, MASK.ERROR, dwc->mask);
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-
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- set_bit(DW_DMA_IS_INITIALIZED, &dwc->flags);
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}
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/*----------------------------------------------------------------------*/
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@@ -1091,8 +1086,6 @@ static void idma32_fifo_partition(struct dw_dma *dw)
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static void dw_dma_off(struct dw_dma *dw)
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{
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- unsigned int i;
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-
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dma_writel(dw, CFG, 0);
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channel_clear_bit(dw, MASK.XFER, dw->all_chan_mask);
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@@ -1103,9 +1096,6 @@ static void dw_dma_off(struct dw_dma *dw)
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while (dma_readl(dw, CFG) & DW_CFG_DMA_EN)
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cpu_relax();
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-
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- for (i = 0; i < dw->dma.chancnt; i++)
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- clear_bit(DW_DMA_IS_INITIALIZED, &dw->chan[i].flags);
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}
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static void dw_dma_on(struct dw_dma *dw)
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@@ -1170,8 +1160,6 @@ static void dwc_free_chan_resources(struct dma_chan *chan)
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/* Clear custom channel configuration */
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memset(&dwc->dws, 0, sizeof(struct dw_dma_slave));
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- clear_bit(DW_DMA_IS_INITIALIZED, &dwc->flags);
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-
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/* Disable interrupts */
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channel_clear_bit(dw, MASK.XFER, dwc->mask);
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channel_clear_bit(dw, MASK.BLOCK, dwc->mask);
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--
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2.27.0
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