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Message-ID: <YPp3FU0Tr9oGGcqc@aptenodytes>
Date: Fri, 23 Jul 2021 10:00:21 +0200
From: Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To: Andy Shevchenko <andy.shevchenko@...il.com>
Cc: Daniel Scally <djrscally@...il.com>,
Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Ezequiel Garcia <ezequiel@...labora.com>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Yang Li <yang.lee@...ux.alibaba.com>,
"open list:MEDIA INPUT INFRASTRUCTURE (V4L/DVB)"
<linux-media@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>,
Yong Zhi <yong.zhi@...el.com>,
Bingbu Cao <bingbu.cao@...el.com>,
Tianshu Qiu <tian.shu.qiu@...el.com>,
Colin Ian King <colin.king@...onical.com>,
"laurent.pinchart@...asonboard.com"
<laurent.pinchart@...asonboard.com>,
"kieran.bingham@...asonboard.com" <kieran.bingham@...asonboard.com>
Subject: Re: [PATCH 12/13] media: i2c: Remove unused macros from ov8865
Hi,
On Fri 23 Jul 21, 01:19, Andy Shevchenko wrote:
> On Thursday, July 22, 2021, Daniel Scally <djrscally@...il.com> wrote:
>
> > There are a number of macros defined in this driver that aren't actually
> > used within it. There's a lot of macros defined in total, so removing the
> > unused ones helps make it a bit less busy.
> >
> > Signed-off-by: Daniel Scally <djrscally@...il.com>
> > ---
> >
> > I wavered about including this, because it might be helpful for someone
> > adding
> > support for other features in the future to have these already defined,
> > but in
> > the end I thought it slightly better to be less busy.
>
> Exactly! I would leave the registers and bitfield definitions untouched as
> they play role of documentation. Of course even if you remove them, they
> will be in the history, but a) harder to access; b) adding new feature may
> introduce slightly different names for the same things.
I agree that it's better to keep them around. for the same reasons.
Cheers,
Paul
> > drivers/media/i2c/ov8865.c | 137 +------------------------------------
> > 1 file changed, 1 insertion(+), 136 deletions(-)
> >
> > diff --git a/drivers/media/i2c/ov8865.c b/drivers/media/i2c/ov8865.c
> > index dca4db3039bb..9b38f2e16906 100644
> > --- a/drivers/media/i2c/ov8865.c
> > +++ b/drivers/media/i2c/ov8865.c
> > @@ -46,8 +46,6 @@
> > #define OV8865_PLL_CTRL6_REG 0x306
> > #define OV8865_PLL_CTRL6_SYS_DIV(v) (((v) - 1) & BIT(0))
> >
> > -#define OV8865_PLL_CTRL8_REG 0x308
> > -#define OV8865_PLL_CTRL9_REG 0x309
> > #define OV8865_PLL_CTRLA_REG 0x30a
> > #define OV8865_PLL_CTRLA_PRE_DIV_HALF(v) (((v) - 1) & BIT(0))
> > #define OV8865_PLL_CTRLB_REG 0x30b
> > @@ -60,41 +58,21 @@
> > #define OV8865_PLL_CTRLE_SYS_DIV(v) ((v) & GENMASK(2, 0))
> > #define OV8865_PLL_CTRLF_REG 0x30f
> > #define OV8865_PLL_CTRLF_SYS_PRE_DIV(v) (((v) - 1) &
> > GENMASK(3, 0))
> > -#define OV8865_PLL_CTRL10_REG 0x310
> > -#define OV8865_PLL_CTRL11_REG 0x311
> > #define OV8865_PLL_CTRL12_REG 0x312
> > #define OV8865_PLL_CTRL12_PRE_DIV_HALF(v) ((((v) - 1) << 4) &
> > BIT(4))
> > #define OV8865_PLL_CTRL12_DAC_DIV(v) (((v) - 1) & GENMASK(3, 0))
> >
> > -#define OV8865_PLL_CTRL1B_REG 0x31b
> > -#define OV8865_PLL_CTRL1C_REG 0x31c
> > -
> > #define OV8865_PLL_CTRL1E_REG 0x31e
> > #define OV8865_PLL_CTRL1E_PLL1_NO_LAT BIT(3)
> >
> > -#define OV8865_PAD_OEN0_REG 0x3000
> > -
> > -#define OV8865_PAD_OEN2_REG 0x3002
> > -
> > -#define OV8865_CLK_RST5_REG 0x3005
> > -
> > #define OV8865_CHIP_ID_HH_REG 0x300a
> > #define OV8865_CHIP_ID_HH_VALUE 0x00
> > #define OV8865_CHIP_ID_H_REG 0x300b
> > #define OV8865_CHIP_ID_H_VALUE 0x88
> > #define OV8865_CHIP_ID_L_REG 0x300c
> > #define OV8865_CHIP_ID_L_VALUE 0x65
> > -#define OV8865_PAD_OUT2_REG 0x300d
> > -
> > -#define OV8865_PAD_SEL2_REG 0x3010
> > -#define OV8865_PAD_PK_REG 0x3011
> > -#define OV8865_PAD_PK_DRIVE_STRENGTH_1X (0 << 5)
> > -#define OV8865_PAD_PK_DRIVE_STRENGTH_2X (1 << 5)
> > -#define OV8865_PAD_PK_DRIVE_STRENGTH_3X (2 << 5)
> > -#define OV8865_PAD_PK_DRIVE_STRENGTH_4X (3 << 5)
> >
> > #define OV8865_PUMP_CLK_DIV_REG 0x3015
> > -#define OV8865_PUMP_CLK_DIV_PUMP_N(v) (((v) << 4) & GENMASK(6,
> > 4))
> > #define OV8865_PUMP_CLK_DIV_PUMP_P(v) ((v) & GENMASK(2, 0))
> >
> > #define OV8865_MIPI_SC_CTRL0_REG 0x3018
> > @@ -102,21 +80,12 @@
> > GENMASK(7, 5))
> > #define OV8865_MIPI_SC_CTRL0_MIPI_EN BIT(4)
> > #define OV8865_MIPI_SC_CTRL0_UNKNOWN BIT(1)
> > -#define OV8865_MIPI_SC_CTRL0_LANES_PD_MIPI BIT(0)
> > -#define OV8865_MIPI_SC_CTRL1_REG 0x3019
> > -#define OV8865_CLK_RST0_REG 0x301a
> > -#define OV8865_CLK_RST1_REG 0x301b
> > -#define OV8865_CLK_RST2_REG 0x301c
> > -#define OV8865_CLK_RST3_REG 0x301d
> > -#define OV8865_CLK_RST4_REG 0x301e
> >
> > #define OV8865_PCLK_SEL_REG 0x3020
> > #define OV8865_PCLK_SEL_PCLK_DIV_MASK BIT(3)
> > #define OV8865_PCLK_SEL_PCLK_DIV(v) ((((v) - 1) << 3) & BIT(3))
> >
> > -#define OV8865_MISC_CTRL_REG 0x3021
> > #define OV8865_MIPI_SC_CTRL2_REG 0x3022
> > -#define OV8865_MIPI_SC_CTRL2_CLK_LANES_PD_MIPI BIT(1)
> > #define OV8865_MIPI_SC_CTRL2_PD_MIPI_RST_SYNC BIT(0)
> >
> > #define OV8865_MIPI_BIT_SEL_REG 0x3031
> > @@ -125,7 +94,6 @@
> > #define OV8865_CLK_SEL0_PLL1_SYS_SEL(v) (((v) << 7) &
> > BIT(7))
> > #define OV8865_CLK_SEL1_REG 0x3033
> > #define OV8865_CLK_SEL1_MIPI_EOF BIT(5)
> > -#define OV8865_CLK_SEL1_UNKNOWN BIT(2)
> > #define OV8865_CLK_SEL1_PLL_SCLK_SEL_MASK BIT(1)
> > #define OV8865_CLK_SEL1_PLL_SCLK_SEL(v) (((v) << 1) &
> > BIT(1))
> >
> > @@ -142,7 +110,6 @@
> > #define OV8865_EXPOSURE_CTRL_H(v) (((v) & GENMASK(15, 8)) >>
> > 8)
> > #define OV8865_EXPOSURE_CTRL_L_REG 0x3502
> > #define OV8865_EXPOSURE_CTRL_L(v) ((v) & GENMASK(7, 0))
> > -#define OV8865_EXPOSURE_GAIN_MANUAL_REG 0x3503
> >
> > #define OV8865_GAIN_CTRL_H_REG 0x3508
> > #define OV8865_GAIN_CTRL_H(v) (((v) & GENMASK(12, 8)) >>
> > 8)
> > @@ -197,18 +164,6 @@
> > #define OV8865_INC_X_ODD(v) ((v) & GENMASK(4, 0))
> > #define OV8865_INC_X_EVEN_REG 0x3815
> > #define OV8865_INC_X_EVEN(v) ((v) & GENMASK(4, 0))
> > -#define OV8865_VSYNC_START_H_REG 0x3816
> > -#define OV8865_VSYNC_START_H(v) (((v) &
> > GENMASK(15, 8)) >> 8)
> > -#define OV8865_VSYNC_START_L_REG 0x3817
> > -#define OV8865_VSYNC_START_L(v) ((v) & GENMASK(7,
> > 0))
> > -#define OV8865_VSYNC_END_H_REG 0x3818
> > -#define OV8865_VSYNC_END_H(v) (((v) & GENMASK(15, 8)) >>
> > 8)
> > -#define OV8865_VSYNC_END_L_REG 0x3819
> > -#define OV8865_VSYNC_END_L(v) ((v) & GENMASK(7, 0))
> > -#define OV8865_HSYNC_FIRST_H_REG 0x381a
> > -#define OV8865_HSYNC_FIRST_H(v) (((v) &
> > GENMASK(15, 8)) >> 8)
> > -#define OV8865_HSYNC_FIRST_L_REG 0x381b
> > -#define OV8865_HSYNC_FIRST_L(v) ((v) & GENMASK(7,
> > 0))
> >
> > #define OV8865_FORMAT1_REG 0x3820
> > #define OV8865_FORMAT1_FLIP_VERT_ISP_EN BIT(2)
> > @@ -240,10 +195,6 @@
> > #define OV8865_AUTO_SIZE_CTRL_CROP_END_X_REG BIT(2)
> > #define OV8865_AUTO_SIZE_CTRL_CROP_START_Y_REG BIT(1)
> > #define OV8865_AUTO_SIZE_CTRL_CROP_START_X_REG BIT(0)
> > -#define OV8865_AUTO_SIZE_X_OFFSET_H_REG 0x3842
> > -#define OV8865_AUTO_SIZE_X_OFFSET_L_REG 0x3843
> > -#define OV8865_AUTO_SIZE_Y_OFFSET_H_REG 0x3844
> > -#define OV8865_AUTO_SIZE_Y_OFFSET_L_REG 0x3845
> > #define OV8865_AUTO_SIZE_BOUNDARIES_REG 0x3846
> > #define OV8865_AUTO_SIZE_BOUNDARIES_Y(v) (((v) << 4) & GENMASK(7,
> > 4))
> > #define OV8865_AUTO_SIZE_BOUNDARIES_X(v) ((v) & GENMASK(3, 0))
> > @@ -259,30 +210,10 @@
> > #define OV8865_BLC_CTRL0_TRIG_FORMAT_EN BIT(6)
> > #define OV8865_BLC_CTRL0_TRIG_GAIN_EN BIT(5)
> > #define OV8865_BLC_CTRL0_TRIG_EXPOSURE_EN BIT(4)
> > -#define OV8865_BLC_CTRL0_TRIG_MANUAL_EN BIT(3)
> > -#define OV8865_BLC_CTRL0_FREEZE_EN BIT(2)
> > -#define OV8865_BLC_CTRL0_ALWAYS_EN BIT(1)
> > #define OV8865_BLC_CTRL0_FILTER_EN BIT(0)
> > #define OV8865_BLC_CTRL1_REG 0x4001
> > -#define OV8865_BLC_CTRL1_DITHER_EN BIT(7)
> > -#define OV8865_BLC_CTRL1_ZERO_LINE_DIFF_EN BIT(6)
> > -#define OV8865_BLC_CTRL1_COL_SHIFT_256 (0 << 4)
> > #define OV8865_BLC_CTRL1_COL_SHIFT_128 (1 << 4)
> > -#define OV8865_BLC_CTRL1_COL_SHIFT_64 (2 << 4)
> > -#define OV8865_BLC_CTRL1_COL_SHIFT_32 (3 << 4)
> > #define OV8865_BLC_CTRL1_OFFSET_LIMIT_EN BIT(2)
> > -#define OV8865_BLC_CTRL1_COLUMN_CANCEL_EN BIT(1)
> > -#define OV8865_BLC_CTRL2_REG 0x4002
> > -#define OV8865_BLC_CTRL3_REG 0x4003
> > -#define OV8865_BLC_CTRL4_REG 0x4004
> > -#define OV8865_BLC_CTRL5_REG 0x4005
> > -#define OV8865_BLC_CTRL6_REG 0x4006
> > -#define OV8865_BLC_CTRL7_REG 0x4007
> > -#define OV8865_BLC_CTRL8_REG 0x4008
> > -#define OV8865_BLC_CTRL9_REG 0x4009
> > -#define OV8865_BLC_CTRLA_REG 0x400a
> > -#define OV8865_BLC_CTRLB_REG 0x400b
> > -#define OV8865_BLC_CTRLC_REG 0x400c
> > #define OV8865_BLC_CTRLD_REG 0x400d
> > #define OV8865_BLC_CTRLD_OFFSET_TRIGGER(v) ((v) & GENMASK(7, 0))
> >
> > @@ -337,66 +268,8 @@
> >
> > /* MIPI */
> >
> > -#define OV8865_MIPI_CTRL0_REG 0x4800
> > -#define OV8865_MIPI_CTRL1_REG 0x4801
> > -#define OV8865_MIPI_CTRL2_REG 0x4802
> > -#define OV8865_MIPI_CTRL3_REG 0x4803
> > -#define OV8865_MIPI_CTRL4_REG 0x4804
> > -#define OV8865_MIPI_CTRL5_REG 0x4805
> > -#define OV8865_MIPI_CTRL6_REG 0x4806
> > -#define OV8865_MIPI_CTRL7_REG 0x4807
> > -#define OV8865_MIPI_CTRL8_REG 0x4808
> > -
> > -#define OV8865_MIPI_FCNT_MAX_H_REG 0x4810
> > -#define OV8865_MIPI_FCNT_MAX_L_REG 0x4811
> > -
> > -#define OV8865_MIPI_CTRL13_REG 0x4813
> > -#define OV8865_MIPI_CTRL14_REG 0x4814
> > -#define OV8865_MIPI_CTRL15_REG 0x4815
> > -#define OV8865_MIPI_EMBEDDED_DT_REG 0x4816
> > -
> > -#define OV8865_MIPI_HS_ZERO_MIN_H_REG 0x4818
> > -#define OV8865_MIPI_HS_ZERO_MIN_L_REG 0x4819
> > -#define OV8865_MIPI_HS_TRAIL_MIN_H_REG 0x481a
> > -#define OV8865_MIPI_HS_TRAIL_MIN_L_REG 0x481b
> > -#define OV8865_MIPI_CLK_ZERO_MIN_H_REG 0x481c
> > -#define OV8865_MIPI_CLK_ZERO_MIN_L_REG 0x481d
> > -#define OV8865_MIPI_CLK_PREPARE_MAX_REG 0x481e
> > -#define OV8865_MIPI_CLK_PREPARE_MIN_REG 0x481f
> > -#define OV8865_MIPI_CLK_POST_MIN_H_REG 0x4820
> > -#define OV8865_MIPI_CLK_POST_MIN_L_REG 0x4821
> > -#define OV8865_MIPI_CLK_TRAIL_MIN_H_REG 0x4822
> > -#define OV8865_MIPI_CLK_TRAIL_MIN_L_REG 0x4823
> > -#define OV8865_MIPI_LPX_P_MIN_H_REG 0x4824
> > -#define OV8865_MIPI_LPX_P_MIN_L_REG 0x4825
> > -#define OV8865_MIPI_HS_PREPARE_MIN_REG 0x4826
> > -#define OV8865_MIPI_HS_PREPARE_MAX_REG 0x4827
> > -#define OV8865_MIPI_HS_EXIT_MIN_H_REG 0x4828
> > -#define OV8865_MIPI_HS_EXIT_MIN_L_REG 0x4829
> > -#define OV8865_MIPI_UI_HS_ZERO_MIN_REG 0x482a
> > -#define OV8865_MIPI_UI_HS_TRAIL_MIN_REG 0x482b
> > -#define OV8865_MIPI_UI_CLK_ZERO_MIN_REG 0x482c
> > -#define OV8865_MIPI_UI_CLK_PREPARE_REG 0x482d
> > -#define OV8865_MIPI_UI_CLK_POST_MIN_REG 0x482e
> > -#define OV8865_MIPI_UI_CLK_TRAIL_MIN_REG 0x482f
> > -#define OV8865_MIPI_UI_LPX_P_MIN_REG 0x4830
> > -#define OV8865_MIPI_UI_HS_PREPARE_REG 0x4831
> > -#define OV8865_MIPI_UI_HS_EXIT_MIN_REG 0x4832
> > -#define OV8865_MIPI_PKT_START_SIZE_REG 0x4833
> > -
> > #define OV8865_MIPI_PCLK_PERIOD_REG 0x4837
> > -#define OV8865_MIPI_LP_GPIO0_REG 0x4838
> > -#define OV8865_MIPI_LP_GPIO1_REG 0x4839
> > -
> > -#define OV8865_MIPI_CTRL3C_REG 0x483c
> > -#define OV8865_MIPI_LP_GPIO4_REG 0x483d
> > -
> > -#define OV8865_MIPI_CTRL4A_REG 0x484a
> > -#define OV8865_MIPI_CTRL4B_REG 0x484b
> > -#define OV8865_MIPI_CTRL4C_REG 0x484c
> > -#define OV8865_MIPI_LANE_TEST_PATTERN_REG 0x484d
> > -#define OV8865_MIPI_FRAME_END_DELAY_REG 0x484e
> > -#define OV8865_MIPI_CLOCK_TEST_PATTERN_REG 0x484f
> > +
> > #define OV8865_MIPI_LANE_SEL01_REG 0x4850
> > #define OV8865_MIPI_LANE_SEL01_LANE0(v) (((v) << 0) &
> > GENMASK(2, 0))
> > #define OV8865_MIPI_LANE_SEL01_LANE1(v) (((v) << 4) &
> > GENMASK(6, 4))
> > @@ -407,7 +280,6 @@
> > /* ISP */
> >
> > #define OV8865_ISP_CTRL0_REG 0x5000
> > -#define OV8865_ISP_CTRL0_LENC_EN BIT(7)
> > #define OV8865_ISP_CTRL0_WHITE_BALANCE_EN BIT(4)
> > #define OV8865_ISP_CTRL0_DPC_BLACK_EN BIT(2)
> > #define OV8865_ISP_CTRL0_DPC_WHITE_EN BIT(1)
> > @@ -416,17 +288,11 @@
> > #define OV8865_ISP_CTRL2_REG 0x5002
> > #define OV8865_ISP_CTRL2_DEBUG BIT(3)
> > #define OV8865_ISP_CTRL2_VARIOPIXEL_EN BIT(2)
> > -#define OV8865_ISP_CTRL2_VSYNC_LATCH_EN BIT(0)
> > -#define OV8865_ISP_CTRL3_REG 0x5003
> >
> > #define OV8865_ISP_GAIN_RED_H_REG 0x5018
> > #define OV8865_ISP_GAIN_RED_H(v) (((v) & GENMASK(13, 6)) >>
> > 6)
> > #define OV8865_ISP_GAIN_RED_L_REG 0x5019
> > #define OV8865_ISP_GAIN_RED_L(v) ((v) & GENMASK(5, 0))
> > -#define OV8865_ISP_GAIN_GREEN_H_REG 0x501a
> > -#define OV8865_ISP_GAIN_GREEN_H(v) (((v) & GENMASK(13, 6)) >>
> > 6)
> > -#define OV8865_ISP_GAIN_GREEN_L_REG 0x501b
> > -#define OV8865_ISP_GAIN_GREEN_L(v) ((v) & GENMASK(5, 0))
> > #define OV8865_ISP_GAIN_BLUE_H_REG 0x501c
> > #define OV8865_ISP_GAIN_BLUE_H(v) (((v) & GENMASK(13, 6)) >>
> > 6)
> > #define OV8865_ISP_GAIN_BLUE_L_REG 0x501d
> > @@ -434,7 +300,6 @@
> >
> > /* VarioPixel */
> >
> > -#define OV8865_VAP_CTRL0_REG 0x5900
> > #define OV8865_VAP_CTRL1_REG 0x5901
> > #define OV8865_VAP_CTRL1_HSUB_COEF(v) ((((v) - 1) << 2) & \
> > GENMASK(3, 2))
> > --
> > 2.25.1
> >
> >
>
> --
> With Best Regards,
> Andy Shevchenko
--
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com
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