linux-kernel - Re: [PATCH v7 3/4] drm/msm/dpu: replace BIT(x) with correspond marco define string

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Message-ID: <82707bbf-5005-9765-292b-1f883a32946c@linaro.org>
Date:   Thu, 17 Feb 2022 09:46:13 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Kuogee Hsieh <quic_khsieh@...cinc.com>,
        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
Cc:     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 v7 3/4] drm/msm/dpu: replace BIT(x) with correspond marco
 define string

On 17/02/2022 01:05, Kuogee Hsieh 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>

This patch should come first.

> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c | 16 +++++++++++-----
>   1 file changed, 11 insertions(+), 5 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 b68e696..8f10aab 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_intf.c
> @@ -61,6 +61,12 @@
>   
>   #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,
> @@ -139,13 +145,13 @@ 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);
> +		intf_cfg |= INTF_CFG_ACTIVE_H_EN;
>   	} else {
>   		active_hctl = 0;
>   	}
>   
>   	if (active_v_end)
> -		intf_cfg |= BIT(30);
> +		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;
> @@ -156,7 +162,7 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
>   	 * if compression is enabled in 1 pixel per clock mode
>   	 */
>   	if (p->wide_bus_en)
> -		intf_cfg2 |=  (BIT(0) | BIT(4));
> +		intf_cfg2 |= (INTF_CFG2_DATABUS_WIDEN | INTF_CFG2_DATA_HCTL_EN);
>   
>   	data_width = p->width;
>   
> @@ -178,8 +184,8 @@ static void dpu_hw_intf_setup_timing_engine(struct dpu_hw_intf *ctx,
>   		active_hctl = (active_h_end << 16) | active_h_start;
>   		display_hctl = active_hctl;
>   
> -		intf_cfg |= BIT(29);
> -		intf_cfg |= BIT(30);
> +		intf_cfg |= INTF_CFG_ACTIVE_H_EN;
> +		intf_cfg |= INTF_CFG_ACTIVE_V_EN;
>   	}
>   
>   	den_polarity = 0;


-- 
With best wishes
Dmitry