linux-kernel - Re: [PATCH 03/12] drm/msm/dpu: Compatible with Kaanapali interrupt register

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Message-ID: <nfekr4vi34ftxzyyf5xv4tsb5cr3tokiyfkerypqjf26dos3uq@42wcn6ji7nnb>
Date: Thu, 23 Oct 2025 14:59:12 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: yuanjie yang <yuanjie.yang@....qualcomm.com>
Cc: robin.clark@....qualcomm.com, lumag@...nel.org, abhinav.kumar@...ux.dev,
        sean@...rly.run, marijn.suijten@...ainline.org, airlied@...il.com,
        simona@...ll.ch, maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
        tzimmermann@...e.de, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, quic_mkrishn@...cinc.com, jonathan@...ek.ca,
        quic_khsieh@...cinc.com, neil.armstrong@...aro.org,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, tingwei.zhang@....qualcomm.com,
        aiqun.yu@....qualcomm.com, yongxing.mou@....qualcomm.com
Subject: Re: [PATCH 03/12] drm/msm/dpu: Compatible with Kaanapali interrupt
 register

On Thu, Oct 23, 2025 at 03:53:52PM +0800, yuanjie yang wrote:
> From: Yuanjie Yang <yuanjie.yang@....qualcomm.com>
> 
> DPU version 13 introduces changes to the interrupt register
> layout. Update the driver to support these modifications for
> proper interrupt handling.

So... Previous patch enabled support for the platform and it has been
using wrong registers for interrupts? I think that's broken.

> 
> Signed-off-by: Yongxing Mou <yongxing.mou@....qualcomm.com>
> Signed-off-by: Yuanjie Yang <yuanjie.yang@....qualcomm.com>
> ---
>  .../gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c | 89 ++++++++++++++++++-
>  1 file changed, 88 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
> index 49bd77a755aa..8d265581f6ec 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c
> @@ -40,6 +40,15 @@
>  #define MDP_INTF_REV_7xxx_INTR_TEAR_STATUS(intf)	(MDP_INTF_REV_7xxx_TEAR_OFF(intf) + 0x004)
>  #define MDP_INTF_REV_7xxx_INTR_TEAR_CLEAR(intf)		(MDP_INTF_REV_7xxx_TEAR_OFF(intf) + 0x008)
>  
> +#define MDP_INTF_REV_13xx_OFF(intf)			(0x18D000 + 0x1000 * (intf))

Lowercase hex

> +#define MDP_INTF_REV_13xx_INTR_EN(intf)			(MDP_INTF_REV_13xx_OFF(intf) + 0x1c0)
> +#define MDP_INTF_REV_13xx_INTR_STATUS(intf)		(MDP_INTF_REV_13xx_OFF(intf) + 0x1c4)
> +#define MDP_INTF_REV_13xx_INTR_CLEAR(intf)		(MDP_INTF_REV_13xx_OFF(intf) + 0x1c8)
> +#define MDP_INTF_REV_13xx_TEAR_OFF(intf)		(0x18D800 + 0x1000 * (intf))
> +#define MDP_INTF_REV_13xx_INTR_TEAR_EN(intf)		(MDP_INTF_REV_13xx_TEAR_OFF(intf) + 0x000)
> +#define MDP_INTF_REV_13xx_INTR_TEAR_STATUS(intf)	(MDP_INTF_REV_13xx_TEAR_OFF(intf) + 0x004)
> +#define MDP_INTF_REV_13xx_INTR_TEAR_CLEAR(intf)		(MDP_INTF_REV_13xx_TEAR_OFF(intf) + 0x008)
> +
>  /**
>   * struct dpu_intr_reg - array of DPU register sets
>   * @clr_off:	offset to CLEAR reg

-- 
With best wishes
Dmitry