| Message ID | 20210920144938.314588-6-marcel@ziswiler.com |
|---|---|
| State | New |
| Headers | show |
| Series | ARM: prepare and add colibri imx6ull 1gb (emmc) support | expand |
On 9/20/21 4:49 PM, Marcel Ziswiler wrote: > From: Marcel Ziswiler <marcel.ziswiler@toradex.com> > > Build CONFIG_IMX_SDMA as a module to avoid the following boot issue: > > [ 5.214751] imx-sdma 20ec000.sdma: Direct firmware load for > imx/sdma/sdma-imx6q.bin failed with error -2 > [ 5.215762] imx-sdma 20ec000.sdma: Falling back to sysfs fallback > for: imx/sdma/sdma-imx6q.bin Isn't there some ROM-side SDMA firmware baked into the MX6 which is used as a fallback if loading newer one from filesystem fails ? I suspect the default ROM firmware might be buggy.
On Mon, 2021-09-20 at 16:52 +0200, Marek Vasut wrote: > On 9/20/21 4:49 PM, Marcel Ziswiler wrote: > > From: Marcel Ziswiler <marcel.ziswiler@toradex.com> > > > > Build CONFIG_IMX_SDMA as a module to avoid the following boot issue: > > > > [ 5.214751] imx-sdma 20ec000.sdma: Direct firmware load for > > imx/sdma/sdma-imx6q.bin failed with error -2 > > [ 5.215762] imx-sdma 20ec000.sdma: Falling back to sysfs fallback > > for: imx/sdma/sdma-imx6q.bin > > Isn't there some ROM-side SDMA firmware baked into the MX6 which is used > as a fallback if loading newer one from filesystem fails ? I suspect the > default ROM firmware might be buggy. I'm not so sure about this. At least it seems to fail if no external firmware can be loaded.
On 9/20/21 5:55 PM, Marcel Ziswiler wrote: > On Mon, 2021-09-20 at 16:52 +0200, Marek Vasut wrote: >> On 9/20/21 4:49 PM, Marcel Ziswiler wrote: >>> From: Marcel Ziswiler <marcel.ziswiler@toradex.com> >>> >>> Build CONFIG_IMX_SDMA as a module to avoid the following boot issue: >>> >>> [ 5.214751] imx-sdma 20ec000.sdma: Direct firmware load for >>> imx/sdma/sdma-imx6q.bin failed with error -2 >>> [ 5.215762] imx-sdma 20ec000.sdma: Falling back to sysfs fallback >>> for: imx/sdma/sdma-imx6q.bin >> >> Isn't there some ROM-side SDMA firmware baked into the MX6 which is used >> as a fallback if loading newer one from filesystem fails ? I suspect the >> default ROM firmware might be buggy. > > I'm not so sure about this. At least it seems to fail if no external firmware can be loaded. See e.g. SDMA chapter in MX6SDLRM or similar, it does talk about 4k boot ROM, which contains scripts and utilities later referenced by scripts in RAM. It might be worth looking into that a bit further, but that seems like a separate topic from this patch.
Am Montag, dem 20.09.2021 um 18:14 +0200 schrieb Marek Vasut: > On 9/20/21 5:55 PM, Marcel Ziswiler wrote: > > On Mon, 2021-09-20 at 16:52 +0200, Marek Vasut wrote: > > > On 9/20/21 4:49 PM, Marcel Ziswiler wrote: > > > > From: Marcel Ziswiler <marcel.ziswiler@toradex.com> > > > > > > > > Build CONFIG_IMX_SDMA as a module to avoid the following boot issue: > > > > > > > > [ 5.214751] imx-sdma 20ec000.sdma: Direct firmware load for > > > > imx/sdma/sdma-imx6q.bin failed with error -2 > > > > [ 5.215762] imx-sdma 20ec000.sdma: Falling back to sysfs fallback > > > > for: imx/sdma/sdma-imx6q.bin > > > > > > Isn't there some ROM-side SDMA firmware baked into the MX6 which is used > > > as a fallback if loading newer one from filesystem fails ? I suspect the > > > default ROM firmware might be buggy. > > > > I'm not so sure about this. At least it seems to fail if no external firmware can be loaded. > > See e.g. SDMA chapter in MX6SDLRM or similar, it does talk about 4k boot > ROM, which contains scripts and utilities later referenced by scripts in > RAM. It might be worth looking into that a bit further, but that seems > like a separate topic from this patch. > Yep, most of the systems we ship do work with the ROM firmware, which should be picked when firmware loading fails. The RAM firmware is useful in some cases like multichannel SAI or now to work around the SPI DMA issue on i.MX6. Regards, Lucas
On Mon, Sep 20, 2021 at 04:49:34PM +0200, Marcel Ziswiler wrote: > From: Marcel Ziswiler <marcel.ziswiler@toradex.com> > > Build CONFIG_IMX_SDMA as a module to avoid the following boot issue: > > [ 5.214751] imx-sdma 20ec000.sdma: Direct firmware load for > imx/sdma/sdma-imx6q.bin failed with error -2 > [ 5.215762] imx-sdma 20ec000.sdma: Falling back to sysfs fallback > for: imx/sdma/sdma-imx6q.bin > > Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com> > Reviewed-by: Fabio Estevam <festevam@gmail.com> Applied, thanks!
diff --git a/arch/arm/configs/imx_v6_v7_defconfig b/arch/arm/configs/imx_v6_v7_defconfig index 21803cd2d1ba7..c0008b7faf2ce 100644 --- a/arch/arm/configs/imx_v6_v7_defconfig +++ b/arch/arm/configs/imx_v6_v7_defconfig @@ -380,7 +380,7 @@ CONFIG_RTC_DRV_MXC_V2=y CONFIG_RTC_DRV_SNVS=y CONFIG_DMADEVICES=y CONFIG_FSL_EDMA=y -CONFIG_IMX_SDMA=y +CONFIG_IMX_SDMA=m CONFIG_MXS_DMA=y CONFIG_DMATEST=m CONFIG_STAGING=y