RE: [RESEND v6 09/13] dmaengine: imx-sdma: remove ERR009165 on i.mx6ul

[Robin Gong <yibin.gong@nxp.com>]

On 2020/03/10 Sascha Hauer <s.hauer@pengutronix.de> wrote:
> On Tue, Mar 10, 2020 at 08:59:03AM +0000, Robin Gong wrote:
> > On 2020/03/10 Sascha Hauer <s.hauer@pengutronix.de> wrote:
> > > On Tue, Mar 10, 2020 at 07:31:58PM +0800, Robin Gong wrote:
> > > > ECSPI issue fixed from i.mx6ul at hardware level, no need
> > > > ERR009165 anymore on those chips such as i.mx8mq. Add i.mx6sx from
> > > > where i.mx6ul source.
> > > >
> > > > Signed-off-by: Robin Gong <yibin.gong@nxp.com>
> > > > Acked-by: Vinod Koul <vkoul@kernel.org>
> > > > ---
> > > >  drivers/dma/imx-sdma.c | 51
> > > > +++++++++++++++++++++++++++++++++++++++++++++++++-
> > > >  1 file changed, 50 insertions(+), 1 deletion(-)
> > > >
> > > > diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index
> > > > 56288d8..5ae7237 100644
> > > > --- a/drivers/dma/imx-sdma.c
> > > > +++ b/drivers/dma/imx-sdma.c
> > > > @@ -419,6 +419,13 @@ struct sdma_driver_data {
> > > >  	int num_events;
> > > >  	struct sdma_script_start_addrs	*script_addrs;
> > > >  	bool check_ratio;
> > > > +	/*
> > > > +	 * ecspi ERR009165 fixed should be done in sdma script
> > > > +	 * and it has been fixed in soc from i.mx6ul.
> > > > +	 * please get more information from the below link:
> > > > +	 *
> > > https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fww
> > > w.nx
> p.com%2Fdocs%2Fen%2Ferrata%2FIMX6DQCE.pdf&amp;data=02%7C01%7Cyi
> > >
> bin.gong%40nxp.com%7C91d42046e6894501d48508d7c4cbcae2%7C686ea1d3
> > >
> bc2b4c6fa92cd99c5c301635%7C0%7C1%7C637194251876090170&amp;sdata=
> > > T6LA4xz9CUFlNpnyjHSThEQb8i1rhbY9e1nUyxIGD5Q%3D&amp;reserved=0
> > > > +	 */
> > > > +	bool ecspi_fixed;
> > > >  };
> > > >
> > > >  struct sdma_engine {
> > > > @@ -539,6 +546,31 @@ static struct sdma_driver_data sdma_imx6q = {
> > > >  	.script_addrs = &sdma_script_imx6q,  };
> > > >
> > > > +static struct sdma_script_start_addrs sdma_script_imx6sx = {
> > > > +	.ap_2_ap_addr = 642,
> > > > +	.uart_2_mcu_addr = 817,
> > > > +	.mcu_2_app_addr = 747,
> > > > +	.uartsh_2_mcu_addr = 1032,
> > > > +	.mcu_2_shp_addr = 960,
> > > > +	.app_2_mcu_addr = 683,
> > > > +	.shp_2_mcu_addr = 891,
> > > > +	.spdif_2_mcu_addr = 1100,
> > > > +	.mcu_2_spdif_addr = 1134,
> > > > +};
> > > > +
> > > > +static struct sdma_driver_data sdma_imx6sx = {
> > > > +	.chnenbl0 = SDMA_CHNENBL0_IMX35,
> > > > +	.num_events = 48,
> > > > +	.script_addrs = &sdma_script_imx6sx, };
> > > > +
> > > > +static struct sdma_driver_data sdma_imx6ul = {
> > > > +	.chnenbl0 = SDMA_CHNENBL0_IMX35,
> > > > +	.num_events = 48,
> > > > +	.script_addrs = &sdma_script_imx6sx,
> > > > +	.ecspi_fixed = true,
> > > > +};
> > > > +
> > > >  static struct sdma_script_start_addrs sdma_script_imx7d = {
> > > >  	.ap_2_ap_addr = 644,
> > > >  	.uart_2_mcu_addr = 819,
> > > > @@ -584,9 +616,15 @@ static const struct platform_device_id
> > > sdma_devtypes[] = {
> > > >  		.name = "imx6q-sdma",
> > > >  		.driver_data = (unsigned long)&sdma_imx6q,
> > > >  	}, {
> > > > +		.name = "imx6sx-sdma",
> > > > +		.driver_data = (unsigned long)&sdma_imx6sx,
> > > > +	}, {
> > >
> > > Now the i.MX6sx uses a new sdma_script_start_addrs entry which is
> > > the same as the i.MX6q one we used before with one exception: it
> > > lacks the per_2_per_addr = 6331 entry. This is only used for
> > > IMX_DMATYPE_ASRC and
> > Totally same script for i.mx6 chips whatever i.MX6sx, i.MX6q or i.MX6ul.
> 
> When it's the same then use it.
> 
> > > IMX_DMATYPE_ASRC_SP, both are entirely unused in the mainline
> > > kernel. So why must the i.MX6sx changed here and what has this to do with
> ECSPI?
> > i.MX6ul is based on i.MX6sx, so adding i.MX6sx could keep good shape on our
> i.MX family evolution.
> 
> My point is that there is no difference between i.MX6q and i.MX6sx here, so do
> not artificially introduce i.MX6sx support when all you do is copying the i.MX6q
> support.
Okay, will remove i.MX6sx now.
> --
> Pengutronix e.K.                           |
> |
> Steuerwalder Str. 21                       |
> https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.pe
> ngutronix.de%2F&amp;data=02%7C01%7Cyibin.gong%40nxp.com%7C02af95d
> 81bf745b7b2cc08d7c4d55ed2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0
> %7C0%7C637194293001547060&amp;sdata=cN13LuC6Bgs1m9W6oKc2q03j5rf
> KvsMbonpd1JALA%2Fk%3D&amp;reserved=0  |
> 31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0
> |
> Amtsgericht Hildesheim, HRA 2686           | Fax:
> +49-5121-206917-5555 |