Re: [PATCH 6/6] media: mali-c55: Bypass Purple Fringe Correction

From: Barnabás Pőcze

Date: Fri Mar 13 2026 - 07:18:09 EST

2026. 03. 13. 11:49 keltezéssel, Jacopo Mondi írta:
The Purple Fringe Correction module is enable by default with a POR
enabled


configuration which might not be correct for the lens/sensor combination
in use.

If the Purple Fringe Correction module has to be used, it needs to be
supported in the driver's uAPI and properly configured by userspace.

As the driver doesn't support it at the moment, bypass it by default.

Signed-off-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
---

Reviewed-by: Barnabás Pőcze <barnabas.pocze@xxxxxxxxxxxxxxxx>


drivers/media/platform/arm/mali-c55/mali-c55-params.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/arm/mali-c55/mali-c55-params.c b/drivers/media/platform/arm/mali-c55/mali-c55-params.c
index b9fc904a3844..de0e9d898db7 100644
--- a/drivers/media/platform/arm/mali-c55/mali-c55-params.c
+++ b/drivers/media/platform/arm/mali-c55/mali-c55-params.c
@@ -830,9 +830,10 @@ void mali_c55_params_init_isp_config(struct mali_c55 *mali_c55,
MALI_C55_REG_BYPASS_3_IRIDIX,
MALI_C55_REG_BYPASS_3_IRIDIX);
- /* Bypass the colour noise reduction */
+ /* Bypass the colour noise reduction and the PF modules */
mali_c55_ctx_write(mali_c55, MALI_C55_REG_BYPASS_4,
- MALI_C55_REG_BYPASS_4_CNR);
+ MALI_C55_REG_BYPASS_4_CNR |
+ MALI_C55_REG_BYPASS_4_PF_CORRECTION);
/* Disable the sinter module */
mali_c55_ctx_update_bits(mali_c55, MALI_C55_REG_SINTER_CONFIG,