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path: root/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch
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Diffstat (limited to 'target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch')
-rw-r--r--target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch70
1 files changed, 37 insertions, 33 deletions
diff --git a/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch b/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch
index ce59d492e2..de324ffd6e 100644
--- a/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch
+++ b/target/linux/ipq806x/patches-4.9/0016-spi-qup-allow-mulitple-DMA-transactions-per-spi-xfer.patch
@@ -44,54 +44,58 @@ Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
- ret = spi_qup_io_config(spi, xfer);
- if (ret)
- return ret;
-+ rx_sgl = xfer->rx_sg.sgl;
-+ tx_sgl = xfer->tx_sg.sgl;
-
+-
- /* before issuing the descriptors, set the QUP to run */
- ret = spi_qup_set_state(qup, QUP_STATE_RUN);
- if (ret) {
- dev_warn(qup->dev, "cannot set RUN state\n");
- return ret;
- }
-+ do {
-+ int rx_nents = 0, tx_nents = 0;
-
+-
- if (!qup->qup_v1) {
- if (xfer->rx_buf)
- rx_done = spi_qup_dma_done;
-+ if (rx_sgl) {
-+ rx_nents = sg_nents_for_len(rx_sgl, SPI_MAX_XFER);
-+ if (rx_nents < 0)
-+ rx_nents = sg_nents(rx_sgl);
-
+-
- if (xfer->tx_buf)
- tx_done = spi_qup_dma_done;
- }
-+ qup->n_words = spi_qup_sgl_get_size(rx_sgl, rx_nents) /
-+ qup->w_size;
-+ }
-
+-
- if (xfer->rx_buf) {
- ret = spi_qup_prep_sg(master, xfer->rx_sg.sgl,
- xfer->rx_sg.nents, DMA_DEV_TO_MEM,
- rx_done, &qup->done);
- if (ret)
- return ret;
-+ if (tx_sgl) {
-+ tx_nents = sg_nents_for_len(tx_sgl, SPI_MAX_XFER);
-+ if (tx_nents < 0)
-+ tx_nents = sg_nents(tx_sgl);
++ rx_sgl = xfer->rx_sg.sgl;
++ tx_sgl = xfer->tx_sg.sgl;
- dma_async_issue_pending(master->dma_rx);
- }
-+ qup->n_words = spi_qup_sgl_get_size(tx_sgl, tx_nents) /
-+ qup->w_size;
-+ }
++ do {
++ int rx_nents = 0, tx_nents = 0;
- if (xfer->tx_buf) {
- ret = spi_qup_prep_sg(master, xfer->tx_sg.sgl,
- xfer->tx_sg.nents, DMA_MEM_TO_DEV,
- tx_done, &qup->dma_tx_done);
++ if (rx_sgl) {
++ rx_nents = sg_nents_for_len(rx_sgl, SPI_MAX_XFER);
++ if (rx_nents < 0)
++ rx_nents = sg_nents(rx_sgl);
++
++ qup->n_words = spi_qup_sgl_get_size(rx_sgl, rx_nents) /
++ qup->w_size;
++ }
++
++ if (tx_sgl) {
++ tx_nents = sg_nents_for_len(tx_sgl, SPI_MAX_XFER);
++ if (tx_nents < 0)
++ tx_nents = sg_nents(tx_sgl);
++
++ qup->n_words = spi_qup_sgl_get_size(tx_sgl, tx_nents) /
++ qup->w_size;
++ }
++
+
+ ret = spi_qup_io_config(spi, xfer);
if (ret)
@@ -105,22 +109,17 @@ Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
+ dev_warn(qup->dev, "cannot set RUN state\n");
+ return ret;
+ }
-
-- if (xfer->rx_buf && !wait_for_completion_timeout(&qup->done, timeout))
-- return -ETIMEDOUT;
++
+ if (!qup->qup_v1) {
+ if (rx_sgl) {
+ rx_done = spi_qup_dma_done;
+ }
-
-- if (xfer->tx_buf && !wait_for_completion_timeout(&qup->dma_tx_done, timeout))
-- ret = -ETIMEDOUT;
++
+ if (tx_sgl) {
+ tx_done = spi_qup_dma_done;
+ }
+ }
-
-- return ret;
++
+ if (rx_sgl) {
+ ret = spi_qup_prep_sg(master, rx_sgl, rx_nents,
+ DMA_DEV_TO_MEM, rx_done,
@@ -150,12 +149,17 @@ Signed-off-by: Matthew McClintock <mmcclint@codeaurora.org>
+ pr_emerg(" tx timed out\n");
+ return -ETIMEDOUT;
+ }
-+
+
+- if (xfer->rx_buf && !wait_for_completion_timeout(&qup->done, timeout))
+- return -ETIMEDOUT;
+ for (; rx_sgl && rx_nents--; rx_sgl = sg_next(rx_sgl));
+ for (; tx_sgl && tx_nents--; tx_sgl = sg_next(tx_sgl));
-+
+
+- if (xfer->tx_buf && !wait_for_completion_timeout(&qup->dma_tx_done, timeout))
+- ret = -ETIMEDOUT;
+ } while (rx_sgl || tx_sgl);
-+
+
+- return ret;
+ return 0;
}