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From: Stefan Agner <stefan@agner.ch>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Marek Vasut <marex@denx.de>,
	kernel@pengutronix.de, dri-devel@lists.freedesktop.org,
	linux-imx@nxp.com
Subject: Re: [PATCH 03/21] drm: mxsfb: Use BIT() macro to define register bitfields
Date: Mon, 23 Mar 2020 22:34:13 +0100
Message-ID: <1501d151a6aa10996d929bea9013bb85@agner.ch> (raw)
In-Reply-To: <20200309195216.31042-4-laurent.pinchart@ideasonboard.com>

On 2020-03-09 20:51, Laurent Pinchart wrote:
> Using BIT() is preferred over manual shifts as it's more readable,
> handles the 1 << 31 case properly, and avoids other mistakes as shown by
> the DEBUG0_HSYNC and DEBUG0_VSYNC bits (that are currently unused). Use
> it.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Reviewed-by: Stefan Agner <stefan@agner.ch>

> ---
>  drivers/gpu/drm/mxsfb/mxsfb_regs.h | 56 +++++++++++++++---------------
>  1 file changed, 28 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mxsfb/mxsfb_regs.h
> b/drivers/gpu/drm/mxsfb/mxsfb_regs.h
> index 932d7ea08fd5..713d8f830135 100644
> --- a/drivers/gpu/drm/mxsfb/mxsfb_regs.h
> +++ b/drivers/gpu/drm/mxsfb/mxsfb_regs.h
> @@ -28,51 +28,51 @@
>  #define LCDC_V4_DEBUG0			0x1d0
>  #define LCDC_V3_DEBUG0			0x1f0
>  
> -#define CTRL_SFTRST			(1 << 31)
> -#define CTRL_CLKGATE			(1 << 30)
> -#define CTRL_BYPASS_COUNT		(1 << 19)
> -#define CTRL_VSYNC_MODE			(1 << 18)
> -#define CTRL_DOTCLK_MODE		(1 << 17)
> -#define CTRL_DATA_SELECT		(1 << 16)
> +#define CTRL_SFTRST			BIT(31)
> +#define CTRL_CLKGATE			BIT(30)
> +#define CTRL_BYPASS_COUNT		BIT(19)
> +#define CTRL_VSYNC_MODE			BIT(18)
> +#define CTRL_DOTCLK_MODE		BIT(17)
> +#define CTRL_DATA_SELECT		BIT(16)
>  #define CTRL_SET_BUS_WIDTH(x)		(((x) & 0x3) << 10)
>  #define CTRL_GET_BUS_WIDTH(x)		(((x) >> 10) & 0x3)
>  #define CTRL_BUS_WIDTH_MASK		(0x3 << 10)
>  #define CTRL_SET_WORD_LENGTH(x)		(((x) & 0x3) << 8)
>  #define CTRL_GET_WORD_LENGTH(x)		(((x) >> 8) & 0x3)
> -#define CTRL_MASTER			(1 << 5)
> -#define CTRL_DF16			(1 << 3)
> -#define CTRL_DF18			(1 << 2)
> -#define CTRL_DF24			(1 << 1)
> -#define CTRL_RUN			(1 << 0)
> +#define CTRL_MASTER			BIT(5)
> +#define CTRL_DF16			BIT(3)
> +#define CTRL_DF18			BIT(2)
> +#define CTRL_DF24			BIT(1)
> +#define CTRL_RUN			BIT(0)
>  
> -#define CTRL1_FIFO_CLEAR		(1 << 21)
> +#define CTRL1_FIFO_CLEAR		BIT(21)
>  #define CTRL1_SET_BYTE_PACKAGING(x)	(((x) & 0xf) << 16)
>  #define CTRL1_GET_BYTE_PACKAGING(x)	(((x) >> 16) & 0xf)
> -#define CTRL1_CUR_FRAME_DONE_IRQ_EN	(1 << 13)
> -#define CTRL1_CUR_FRAME_DONE_IRQ	(1 << 9)
> +#define CTRL1_CUR_FRAME_DONE_IRQ_EN	BIT(13)
> +#define CTRL1_CUR_FRAME_DONE_IRQ	BIT(9)
>  
>  #define TRANSFER_COUNT_SET_VCOUNT(x)	(((x) & 0xffff) << 16)
>  #define TRANSFER_COUNT_GET_VCOUNT(x)	(((x) >> 16) & 0xffff)
>  #define TRANSFER_COUNT_SET_HCOUNT(x)	((x) & 0xffff)
>  #define TRANSFER_COUNT_GET_HCOUNT(x)	((x) & 0xffff)
>  
> -#define VDCTRL0_ENABLE_PRESENT		(1 << 28)
> -#define VDCTRL0_VSYNC_ACT_HIGH		(1 << 27)
> -#define VDCTRL0_HSYNC_ACT_HIGH		(1 << 26)
> -#define VDCTRL0_DOTCLK_ACT_FALLING	(1 << 25)
> -#define VDCTRL0_ENABLE_ACT_HIGH		(1 << 24)
> -#define VDCTRL0_VSYNC_PERIOD_UNIT	(1 << 21)
> -#define VDCTRL0_VSYNC_PULSE_WIDTH_UNIT	(1 << 20)
> -#define VDCTRL0_HALF_LINE		(1 << 19)
> -#define VDCTRL0_HALF_LINE_MODE		(1 << 18)
> +#define VDCTRL0_ENABLE_PRESENT		BIT(28)
> +#define VDCTRL0_VSYNC_ACT_HIGH		BIT(27)
> +#define VDCTRL0_HSYNC_ACT_HIGH		BIT(26)
> +#define VDCTRL0_DOTCLK_ACT_FALLING	BIT(25)
> +#define VDCTRL0_ENABLE_ACT_HIGH		BIT(24)
> +#define VDCTRL0_VSYNC_PERIOD_UNIT	BIT(21)
> +#define VDCTRL0_VSYNC_PULSE_WIDTH_UNIT	BIT(20)
> +#define VDCTRL0_HALF_LINE		BIT(19)
> +#define VDCTRL0_HALF_LINE_MODE		BIT(18)
>  #define VDCTRL0_SET_VSYNC_PULSE_WIDTH(x) ((x) & 0x3ffff)
>  #define VDCTRL0_GET_VSYNC_PULSE_WIDTH(x) ((x) & 0x3ffff)
>  
>  #define VDCTRL2_SET_HSYNC_PERIOD(x)	((x) & 0x3ffff)
>  #define VDCTRL2_GET_HSYNC_PERIOD(x)	((x) & 0x3ffff)
>  
> -#define VDCTRL3_MUX_SYNC_SIGNALS	(1 << 29)
> -#define VDCTRL3_VSYNC_ONLY		(1 << 28)
> +#define VDCTRL3_MUX_SYNC_SIGNALS	BIT(29)
> +#define VDCTRL3_VSYNC_ONLY		BIT(28)
>  #define SET_HOR_WAIT_CNT(x)		(((x) & 0xfff) << 16)
>  #define GET_HOR_WAIT_CNT(x)		(((x) >> 16) & 0xfff)
>  #define SET_VERT_WAIT_CNT(x)		((x) & 0xffff)
> @@ -80,11 +80,11 @@
>  
>  #define VDCTRL4_SET_DOTCLK_DLY(x)	(((x) & 0x7) << 29) /* v4 only */
>  #define VDCTRL4_GET_DOTCLK_DLY(x)	(((x) >> 29) & 0x7) /* v4 only */
> -#define VDCTRL4_SYNC_SIGNALS_ON		(1 << 18)
> +#define VDCTRL4_SYNC_SIGNALS_ON		BIT(18)
>  #define SET_DOTCLK_H_VALID_DATA_CNT(x)	((x) & 0x3ffff)
>  
> -#define DEBUG0_HSYNC			(1 < 26)
> -#define DEBUG0_VSYNC			(1 < 25)
> +#define DEBUG0_HSYNC			BIT(26)
> +#define DEBUG0_VSYNC			BIT(25)
>  
>  #define MXSFB_MIN_XRES			120
>  #define MXSFB_MIN_YRES			120
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  reply index

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-09 19:51 [PATCH 00/21] drm: mxsfb: Add i.MX7 support Laurent Pinchart
2020-03-09 19:51 ` [PATCH 01/21] drm: mxsfb: Remove fbdev leftovers Laurent Pinchart
2020-03-23 20:23   ` Stefan Agner
2020-03-09 19:51 ` [PATCH 02/21] drm: mxsfb: Use drm_panel_bridge Laurent Pinchart
2020-03-23 21:27   ` Stefan Agner
2020-03-23 21:38     ` Sam Ravnborg
2020-03-23 23:50       ` Stefan Agner
2020-05-30  2:14     ` Laurent Pinchart
2020-06-02 13:12       ` Daniel Vetter
2020-06-02 14:34         ` Stefan Agner
2020-06-02 17:18           ` Laurent Pinchart
2020-06-02 17:13         ` Laurent Pinchart
2020-06-03  8:16           ` Daniel Vetter
2020-06-04 20:10             ` Sam Ravnborg
2020-03-09 19:51 ` [PATCH 03/21] drm: mxsfb: Use BIT() macro to define register bitfields Laurent Pinchart
2020-03-23 21:34   ` Stefan Agner [this message]
2020-03-09 19:51 ` [PATCH 04/21] drm: mxsfb: Remove unused macros from mxsfb_regs.h Laurent Pinchart
2020-03-23 21:36   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 05/21] drm: mxsfb: Clarify format and bus width configuration Laurent Pinchart
2020-03-23 21:42   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 06/21] drm: mxsfb: Pass mxsfb_drm_private pointer to mxsfb_reset_block() Laurent Pinchart
2020-03-23 21:43   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 07/21] drm: mxsfb: Use LCDC_CTRL register name explicitly Laurent Pinchart
2020-03-23 21:48   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 08/21] drm: mxsfb: Remove register definitions from mxsfb_crtc.c Laurent Pinchart
2020-03-23 21:49   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 09/21] drm: mxsfb: Remove unneeded includes Laurent Pinchart
2020-03-23 21:53   ` Stefan Agner
2020-05-30  0:33     ` Laurent Pinchart
2020-03-09 19:52 ` [PATCH 10/21] drm: mxsfb: Stop using DRM simple display pipeline helper Laurent Pinchart
2020-03-23 22:30   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 11/21] drm: mxsfb: Rename mxsfb_crtc.c to mxsfb_kms.c Laurent Pinchart
2020-03-23 22:31   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 12/21] drm: mxsfb: Move vblank event arm to CRTC .atomic_flush() Laurent Pinchart
2020-03-23 22:38   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 13/21] drm: mxsfb: Don't touch AXI clock in IRQ context Laurent Pinchart
2020-03-23 22:50   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 14/21] drm: mxsfb: Enable vblank handling Laurent Pinchart
2020-03-23 23:08   ` Stefan Agner
2020-03-24 10:37     ` Stefan Agner
2020-03-09 19:52 ` [PATCH 15/21] drm: mxsfb: Remove mxsfb_devdata unused fields Laurent Pinchart
2020-03-23 23:15   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 16/21] drm: mxsfb: Add i.MX7 to the list of supported SoCs in Kconfig Laurent Pinchart
2020-03-10 16:28   ` Fabio Estevam
2020-03-10 16:32     ` Laurent Pinchart
2020-03-10 16:37       ` [PATCH v1.1 " Laurent Pinchart
2020-03-23 23:18   ` [PATCH " Stefan Agner
2020-03-09 19:52 ` [PATCH 17/21] drm: mxsfb: Update internal IP version number for i.MX6SX Laurent Pinchart
2020-03-23 23:20   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 18/21] drm: mxsfb: Drop non-OF support Laurent Pinchart
2020-03-23 23:23   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 19/21] drm: mxsfb: Turn mxsfb_set_pixel_fmt() into a void function Laurent Pinchart
2020-03-23 23:28   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 20/21] drm: mxsfb: Merge mxsfb_set_pixel_fmt() and mxsfb_set_bus_fmt() Laurent Pinchart
2020-03-23 23:34   ` Stefan Agner
2020-03-09 19:52 ` [PATCH 21/21] drm: mxsfb: Support the alpha plane Laurent Pinchart
2020-03-23 23:48   ` Stefan Agner
2020-05-30  2:44     ` Laurent Pinchart
2020-03-19  9:36 ` [PATCH 00/21] drm: mxsfb: Add i.MX7 support Laurent Pinchart
2020-04-12 16:37 ` Guido Günther
2020-05-26 15:13 ` Stefan Agner
2020-05-30  0:29   ` Laurent Pinchart

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