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>