From 762ec66e1360bbe9b3dedbddc0f88d9770aac8b9 Mon Sep 17 00:00:00 2001 From: Jacopo Mondi Date: Wed, 11 Mar 2026 12:15:56 +0100 Subject: [PATCH] media: mali-c55: Bypass the Iridix Tonemap engine MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Iridix Tonemap engine, if not bypassed, applies a digital gain in order to compensate under-exposed images. This however breaks the exposure and gain regulation performed on the sensor. If the Iridix Tonemap has to be used, it need to be supported in the ISP uAPI and properly configured by userspace. As the driver doesn't support it at the moment, bypass it by default. Reviewed-by: Barnabás Pőcze Reviewed-by: Daniel Scally Signed-off-by: Jacopo Mondi Signed-off-by: Hans Verkuil --- drivers/media/platform/arm/mali-c55/mali-c55-params.c | 5 +++++ 1 file changed, 5 insertions(+) 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 773e5b6a2b7e..b9fc904a3844 100644 --- a/drivers/media/platform/arm/mali-c55/mali-c55-params.c +++ b/drivers/media/platform/arm/mali-c55/mali-c55-params.c @@ -825,6 +825,11 @@ void mali_c55_params_init_isp_config(struct mali_c55 *mali_c55, /* Disable the temper module's DMA read/write */ mali_c55_ctx_write(mali_c55, MALI_C55_REG_TEMPER_DMA_IO, 0x0); + /* Disable IRIDIX module. */ + mali_c55_ctx_update_bits(mali_c55, MALI_C55_REG_BYPASS_3, + MALI_C55_REG_BYPASS_3_IRIDIX, + MALI_C55_REG_BYPASS_3_IRIDIX); + /* Bypass the colour noise reduction */ mali_c55_ctx_write(mali_c55, MALI_C55_REG_BYPASS_4, MALI_C55_REG_BYPASS_4_CNR);