Re: Applied "spi: rspi: supports 32bytes buffer for DUAL and QUAD" to the spi tree

[Hiep Cao Minh <cm-hiep-HEF513clHfp3+QwDJ9on6Q@public.gmane.org>]

Hi Mark,

On 11/05/2016 02:23 AM, Mark Brown wrote:
> The patch
>
>     spi: rspi: supports 32bytes buffer for DUAL and QUAD
>
> has been applied to the spi tree at
>
>     git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git

Thanks,

Best regards,
Jinzai Solution Inc.
Hiep.

> All being well this means that it will be integrated into the linux-next
> tree (usually sometime in the next 24 hours) and sent to Linus during
> the next merge window (or sooner if it is a bug fix), however if
> problems are discovered then the patch may be dropped or reverted.
>
> You may get further e-mails resulting from automated or manual testing
> and review of the tree, please engage with people reporting problems and
> send followup patches addressing any issues that are reported if needed.
>
> If any updates are required or you are submitting further changes they
> should be sent as incremental updates against current git, existing
> patches will not be replaced.
>
> Please add any relevant lists and maintainers to the CCs when replying
> to this mail.
>
> Thanks,
> Mark
>
> >From 3be09bec42a800d4f8ead8119c462f3eb4fad435 Mon Sep 17 00:00:00 2001
> From: Hiep Cao Minh <cm-hiep-HEF513clHfp3+QwDJ9on6Q@public.gmane.org>
> Date: Fri, 4 Nov 2016 17:38:54 +0900
> Subject: [PATCH] spi: rspi: supports 32bytes buffer for DUAL and QUAD
>
> This patch supports 32bytes of buffer for DUAL and QUAD in QSPI by
> Using Transmit/Receive Buffer Data Triggering Number.
> In order to improve the DUAL and QUAD's performance of SPI
> while transferring data in PIO mode, it sends/receives each 32bytes
> data instead of each byte data as current situation.
>
> Signed-off-by: Hiep Cao Minh <cm-hiep-HEF513clHfp3+QwDJ9on6Q@public.gmane.org>
> Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> ---
>   drivers/spi/spi-rspi.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++---
>   1 file changed, 49 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
> index a816f07e168e..3bab75ab1b25 100644
> --- a/drivers/spi/spi-rspi.c
> +++ b/drivers/spi/spi-rspi.c
> @@ -413,7 +413,7 @@ static unsigned int qspi_set_send_trigger(struct rspi_data *rspi,
>   	return n;
>   }
>   
> -static void qspi_set_receive_trigger(struct rspi_data *rspi, unsigned int len)
> +static int qspi_set_receive_trigger(struct rspi_data *rspi, unsigned int len)
>   {
>   	unsigned int n;
>   
> @@ -428,6 +428,7 @@ static void qspi_set_receive_trigger(struct rspi_data *rspi, unsigned int len)
>   		qspi_update(rspi, SPBFCR_RXTRG_MASK,
>   			     SPBFCR_RXTRG_1B, QSPI_SPBFCR);
>   	}
> +	return n;
>   }
>   
>   #define set_config_register(spi, n) spi->ops->set_config_register(spi, n)
> @@ -514,6 +515,51 @@ static int rspi_pio_transfer(struct rspi_data *rspi, const u8 *tx, u8 *rx,
>   	return 0;
>   }
>   
> +static int rspi_pio_transfer_in_or_our(struct rspi_data *rspi, const u8 *tx,
> +				       u8 *rx, unsigned int n)
> +{
> +	unsigned int i, len;
> +	int ret;
> +
> +	while (n > 0) {
> +		if (tx) {
> +			len = qspi_set_send_trigger(rspi, n);
> +			if (len == QSPI_BUFFER_SIZE) {
> +				ret = rspi_wait_for_tx_empty(rspi);
> +				if (ret < 0) {
> +					dev_err(&rspi->master->dev, "transmit timeout\n");
> +					return ret;
> +				}
> +				for (i = 0; i < len; i++)
> +					rspi_write_data(rspi, *tx++);
> +			} else {
> +				ret = rspi_pio_transfer(rspi, tx, NULL, n);
> +				if (ret < 0)
> +					return ret;
> +			}
> +		}
> +		if (rx) {
> +			len = qspi_set_receive_trigger(rspi, n);
> +			if (len == QSPI_BUFFER_SIZE) {
> +				ret = rspi_wait_for_rx_full(rspi);
> +				if (ret < 0) {
> +					dev_err(&rspi->master->dev, "receive timeout\n");
> +					return ret;
> +				}
> +				for (i = 0; i < len; i++)
> +					*rx++ = rspi_read_data(rspi);
> +			} else {
> +				ret = rspi_pio_transfer(rspi, NULL, rx, n);
> +				if (ret < 0)
> +					return ret;
> +				*rx++ = ret;
> +			}
> +		}
> +		n -= len;
> +	}
> +	return 0;
> +}
> +
>   static void rspi_dma_complete(void *arg)
>   {
>   	struct rspi_data *rspi = arg;
> @@ -793,7 +839,7 @@ static int qspi_transfer_out(struct rspi_data *rspi, struct spi_transfer *xfer)
>   			return ret;
>   	}
>   
> -	ret = rspi_pio_transfer(rspi, xfer->tx_buf, NULL, xfer->len);
> +	ret = rspi_pio_transfer_in_or_our(rspi, xfer->tx_buf, NULL, xfer->len);
>   	if (ret < 0)
>   		return ret;
>   
> @@ -811,7 +857,7 @@ static int qspi_transfer_in(struct rspi_data *rspi, struct spi_transfer *xfer)
>   			return ret;
>   	}
>   
> -	return rspi_pio_transfer(rspi, NULL, xfer->rx_buf, xfer->len);
> +	return rspi_pio_transfer_in_or_our(rspi, NULL, xfer->rx_buf, xfer->len);
>   }
>   
>   static int qspi_transfer_one(struct spi_master *master, struct spi_device *spi,

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