Re: [PATCH v4 0/2] pmdomain: imx: Fix i.MX8MP VC8000E power up sequence

[Peng Fan <peng.fan@oss.nxp.com>]

Hi Ulf,

ping..

Thanks,
Peng
On Wed, Jun 10, 2026 at 10:39:09PM +0800, Peng Fan (OSS) wrote:
>There is an errata for i.MX8MP VC8000E:
>    ERR050531: VPU_NOC power down handshake may hang during VC8000E/VPUMIX
>    power up/down cycling.
>    Description: VC8000E reset de-assertion edge and AXI clock may have a
>    timing issue.
>    Workaround: Set bit2 (vc8000e_clk_en) of BLK_CLK_EN_CSR to 0 to gate off
>    both AXI clock and VC8000E clock sent to VC8000E and AXI clock sent to
>    VPU_NOC m_v_2 interface during VC8000E power up(VC8000E reset is
>    de-asserted by HW)
>
>This patchset is to fix the errata. More info could be found in each
>patch commit.
>
>Sorry for sending v4 at 7.1-rc7, no rush for 7.1.
>
>Signed-off-by: Peng Fan <peng.fan@nxp.com>
>---
>Changes in v4:
>- Add R-b
>- Set is_errata_err050531 to true for vc8000e
>- Link to v3: https://lore.kernel.org/r/20260409-imx8mp-vc8000e-pm-v3-0-3e023eaa245b@nxp.com
>
>Changes in v3:
>- Separate power up notifier fix into patch 1
>- Link to v2: https://lore.kernel.org/r/20260228-imx8mp-vc8000e-pm-v2-1-fd255a0d5958@nxp.com
>
>Changes in v2:
>- Add errata link in commit message
>- Add comment for is_errata_err050531
>- Link to v1: https://lore.kernel.org/r/20260128-imx8mp-vc8000e-pm-v1-1-6c171451c732@nxp.com
>
>---
>Peng Fan (2):
>      pmdomain: imx: Fix i.MX8MP power notifier
>      pmdomain: imx: Fix i.MX8MP VC8000E power up sequence
>
> drivers/pmdomain/imx/imx8m-blk-ctrl.c | 46 +++++++++++++++++++++++++++++++++--
> 1 file changed, 44 insertions(+), 2 deletions(-)
>---
>base-commit: 49e02880ec0a8c378e811bc9d85da188d7c6204c
>change-id: 20260610-b4-imx8mp-vc8000e-pm-v4-1-a978b40c59d0
>
>Best regards,
>--  
>Peng Fan <peng.fan@nxp.com>
>