linux-kernel - Re: [PATCH v8 2/4] drm/msm/dpu: replace BIT(x) with correspond marco define string

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Date:   Fri, 18 Feb 2022 00:44:14 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>
Cc:     dri-devel@...ts.freedesktop.org, robdclark@...il.com,
        sean@...rly.run, swboyd@...omium.org, vkoul@...nel.org,
        daniel@...ll.ch, airlied@...ux.ie, agross@...nel.org,
        bjorn.andersson@...aro.org, quic_abhinavk@...cinc.com,
        quic_aravindh@...cinc.com, quic_sbillaka@...cinc.com,
        freedreno@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 2/4] drm/msm/dpu: replace BIT(x) with correspond marco
 define string

On Fri, 18 Feb 2022 at 00:36, Kuogee Hsieh <quic_khsieh@...cinc.com> wrote:
>
> To improve code readability, this patch replace BIT(x) with
> correspond register bit define string
>
> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 12 +++++++++---
>  1 file changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> index 284f561..c2cd185 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> @@ -60,6 +60,12 @@
>
>  #define   INTF_MUX                      0x25C
>
> +#define INTF_CFG_ACTIVE_H_EN   BIT(29)
> +#define INTF_CFG_ACTIVE_V_EN   BIT(30)
> +
> +#define INTF_CFG2_DATABUS_WIDEN        BIT(0)
> +#define INTF_CFG2_DATA_HCTL_EN BIT(4)
> +
>  static const struct dpu_intf_cfg *_intf_offset(enum dpu_intf intf,
>                 const struct dpu_mdss_cfg *m,
>                 void __iomem *addr,
> @@ -130,13 +136,13 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
>
>         if (active_h_end) {
>                 active_hctl = (active_h_end << 16) | active_h_start;
> -               intf_cfg |= BIT(29);    /* ACTIVE_H_ENABLE */
> +               intf_cfg |= INTF_CFG_ACTIVE_H_EN;
>         } else {
>                 active_hctl = 0;
>         }
>
>         if (active_v_end)
> -               intf_cfg |= BIT(30); /* ACTIVE_V_ENABLE */
> +               intf_cfg |= INTF_CFG_ACTIVE_V_EN;
>
>         hsync_ctl = (hsync_period << 16) | p->hsync_pulse_width;
>         display_hctl = (hsync_end_x << 16) | hsync_start_x;
> @@ -182,7 +188,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
>                                 (0x21 << 8));
>
>         if (ctx->cap->features & BIT(DPU_DATA_HCTL_EN)) {
> -               intf_cfg2 |= BIT(4);
> +               intf_cfg2 |= INTF_CFG2_DATA_HCTL_EN;
>                 display_data_hctl = display_hctl;
>                 DPU_REG_WRITE(c, INTF_CONFIG2, intf_cfg2);
>                 DPU_REG_WRITE(c, INTF_DISPLAY_DATA_HCTL, display_data_hctl);
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>


-- 
With best wishes
Dmitry