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27 Oct 2025 01:50:07 -0700 X-CSE-ConnectionGUID: RWdTYCHBRXaBnyFA3fxD1Q== X-CSE-MsgGUID: hFLDCByJQnS1Drk++R66Ew== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,258,1754982000"; d="scan'208";a="184216145" Received: from slindbla-desk.ger.corp.intel.com (HELO localhost) ([10.245.246.35]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Oct 2025 01:49:59 -0700 From: Jani Nikula To: "Yury Norov (NVIDIA)" , Linus Torvalds , Linus Walleij , Nicolas Frattaroli , Sandy Huang , Heiko =?utf-8?Q?St=C3=BCbner?= , Andy Yan , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Shreeya Patel , Mauro Carvalho Chehab , Jaehoon Chung , Ulf Hansson , Nicolas Frattaroli , Liam Girdwood , Mark Brown , Jaroslav Kysela , Takashi Iwai , "Yury Norov (NVIDIA)" , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, kernel@collabora.com, linux-mmc@vger.kernel.org, linux-sound@vger.kernel.org Cc: Rasmus Villemoes Subject: Re: [PATCH 11/21] drivers: don't use GENMASK() in FIELD_PREP_WM16() In-Reply-To: <20251025164023.308884-12-yury.norov@gmail.com> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo References: <20251025164023.308884-1-yury.norov@gmail.com> <20251025164023.308884-12-yury.norov@gmail.com> Date: Mon, 27 Oct 2025 10:49:56 +0200 Message-ID: <6e82c656573d436b6c53d242a0ed45007e5849ad@intel.com> MIME-Version: 1.0 Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251027_075441_340580_764569E7 X-CRM114-Status: GOOD ( 15.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, 25 Oct 2025, "Yury Norov (NVIDIA)" wrote: > Recently added FIELD_PREP_WM16() in a few places uses GENMASK. It's > confusing and may mislead readers. Switch to BITS() or FIRST_BITS() > as appropriate. GENMASK argument order matches how most specs I've ever looked at define bits. It's high:low. I, for one, think it's silly to add another set of macros purely to swap the argument order. > Suggested-by: Linus Torvalds > Link: https://lore.kernel.org/all/CAHk-=whoOUsqPKb7OQwhQf9H_3=5sXGPJrDbfQfwLB3Bi13tcQ@mail.gmail.com/ > Signed-off-by: Yury Norov (NVIDIA) > --- > drivers/gpu/drm/rockchip/rockchip_lvds.h | 2 +- > drivers/gpu/drm/rockchip/rockchip_vop2_reg.c | 4 ++-- > drivers/media/platform/synopsys/hdmirx/snps_hdmirx.h | 4 ++-- > drivers/mmc/host/dw_mmc-rockchip.c | 4 ++-- > drivers/soc/rockchip/grf.c | 4 ++-- > sound/soc/rockchip/rockchip_i2s_tdm.h | 2 +- > 6 files changed, 10 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/rockchip/rockchip_lvds.h b/drivers/gpu/drm/rockchip/rockchip_lvds.h > index 2d92447d819b..e79e6031be59 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_lvds.h > +++ b/drivers/gpu/drm/rockchip/rockchip_lvds.h > @@ -115,7 +115,7 @@ > #define PX30_LVDS_INVERT_DCLK(val) FIELD_PREP_WM16(BIT(5), (val)) > > #define PX30_LVDS_GRF_PD_VO_CON1 0x438 > -#define PX30_LVDS_FORMAT(val) FIELD_PREP_WM16(GENMASK(14, 13), (val)) > +#define PX30_LVDS_FORMAT(val) FIELD_PREP_WM16(BITS(13, 14), (val)) IMO this change would make more sense in defining register contents: +#define PX30_LVDS_FORMAT_MASK GENMASK(14, 13) -#define PX30_LVDS_FORMAT(val) FIELD_PREP_WM16(GENMASK(14, 13), (val)) +#define PX30_LVDS_FORMAT(val) FIELD_PREP_WM16(PX30_LVDS_FORMAT_MASK, (val)) BR, Jani. > #define PX30_LVDS_MODE_EN(val) FIELD_PREP_WM16(BIT(12), (val)) > #define PX30_LVDS_MSBSEL(val) FIELD_PREP_WM16(BIT(11), (val)) > #define PX30_LVDS_P2S_EN(val) FIELD_PREP_WM16(BIT(6), (val)) > diff --git a/drivers/gpu/drm/rockchip/rockchip_vop2_reg.c b/drivers/gpu/drm/rockchip/rockchip_vop2_reg.c > index 38c49030c7ab..438fea5f6f6d 100644 > --- a/drivers/gpu/drm/rockchip/rockchip_vop2_reg.c > +++ b/drivers/gpu/drm/rockchip/rockchip_vop2_reg.c > @@ -1698,7 +1698,7 @@ static unsigned long rk3588_set_intf_mux(struct vop2_video_port *vp, int id, u32 > val = rk3588_get_hdmi_pol(polflags); > regmap_write(vop2->vop_grf, RK3588_GRF_VOP_CON2, FIELD_PREP_WM16(BIT(1), 1)); > regmap_write(vop2->vo1_grf, RK3588_GRF_VO1_CON0, > - FIELD_PREP_WM16(GENMASK(6, 5), val)); > + FIELD_PREP_WM16(BITS(5, 6), val)); > break; > case ROCKCHIP_VOP2_EP_HDMI1: > div &= ~RK3588_DSP_IF_EDP_HDMI1_DCLK_DIV; > @@ -1711,7 +1711,7 @@ static unsigned long rk3588_set_intf_mux(struct vop2_video_port *vp, int id, u32 > val = rk3588_get_hdmi_pol(polflags); > regmap_write(vop2->vop_grf, RK3588_GRF_VOP_CON2, FIELD_PREP_WM16(BIT(4), 1)); > regmap_write(vop2->vo1_grf, RK3588_GRF_VO1_CON0, > - FIELD_PREP_WM16(GENMASK(8, 7), val)); > + FIELD_PREP_WM16(BITS(7, 8), val)); > break; > case ROCKCHIP_VOP2_EP_EDP0: > div &= ~RK3588_DSP_IF_EDP_HDMI0_DCLK_DIV; > diff --git a/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.h b/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.h > index b13f58e31944..14df3f53ff8f 100644 > --- a/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.h > +++ b/drivers/media/platform/synopsys/hdmirx/snps_hdmirx.h > @@ -12,8 +12,8 @@ > #include > #include > > -#define UPDATE(x, h, l) FIELD_PREP(GENMASK((h), (l)), (x)) > -#define HIWORD_UPDATE(v, h, l) FIELD_PREP_WM16(GENMASK((h), (l)), (v)) > +#define UPDATE(x, h, l) FIELD_PREP(BITS((l), (h)), (x)) > +#define HIWORD_UPDATE(v, h, l) FIELD_PREP_WM16(BITS((l), (h)), (v)) > > /* SYS_GRF */ > #define SYS_GRF_SOC_CON1 0x0304 > diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c > index 82dd906bb002..7fac1a7281bf 100644 > --- a/drivers/mmc/host/dw_mmc-rockchip.c > +++ b/drivers/mmc/host/dw_mmc-rockchip.c > @@ -148,10 +148,10 @@ static int rockchip_mmc_set_internal_phase(struct dw_mci *host, bool sample, int > > if (sample) > mci_writel(host, TIMING_CON1, > - FIELD_PREP_WM16(GENMASK(11, 1), raw_value)); > + FIELD_PREP_WM16(BITS(1, 11), raw_value)); > else > mci_writel(host, TIMING_CON0, > - FIELD_PREP_WM16(GENMASK(11, 1), raw_value)); > + FIELD_PREP_WM16(BITS(1, 11), raw_value)); > > dev_dbg(host->dev, "set %s_phase(%d) delay_nums=%u actual_degrees=%d\n", > sample ? "sample" : "drv", degrees, delay_num, > diff --git a/drivers/soc/rockchip/grf.c b/drivers/soc/rockchip/grf.c > index 344870da7675..89fd4a4c69eb 100644 > --- a/drivers/soc/rockchip/grf.c > +++ b/drivers/soc/rockchip/grf.c > @@ -125,8 +125,8 @@ static const struct rockchip_grf_info rk3566_pipegrf __initconst = { > #define RK3576_SYSGRF_SOC_CON1 0x0004 > > static const struct rockchip_grf_value rk3576_defaults_sys_grf[] __initconst = { > - { "i3c0 weakpull", RK3576_SYSGRF_SOC_CON1, FIELD_PREP_WM16_CONST(GENMASK(7, 6), 3) }, > - { "i3c1 weakpull", RK3576_SYSGRF_SOC_CON1, FIELD_PREP_WM16_CONST(GENMASK(9, 8), 3) }, > + { "i3c0 weakpull", RK3576_SYSGRF_SOC_CON1, FIELD_PREP_WM16_CONST(BITS(6, 7), 3) }, > + { "i3c1 weakpull", RK3576_SYSGRF_SOC_CON1, FIELD_PREP_WM16_CONST(BITS(8, 9), 3) }, > }; > > static const struct rockchip_grf_info rk3576_sysgrf __initconst = { > diff --git a/sound/soc/rockchip/rockchip_i2s_tdm.h b/sound/soc/rockchip/rockchip_i2s_tdm.h > index 0171e05ee886..eee6db372ee7 100644 > --- a/sound/soc/rockchip/rockchip_i2s_tdm.h > +++ b/sound/soc/rockchip/rockchip_i2s_tdm.h > @@ -287,7 +287,7 @@ enum { > #define I2S_TDM_RXCR (0x0034) > #define I2S_CLKDIV (0x0038) > > -#define HIWORD_UPDATE(v, h, l) (FIELD_PREP_WM16_CONST(GENMASK((h), (l)), (v))) > +#define HIWORD_UPDATE(v, h, l) (FIELD_PREP_WM16_CONST(BITS((l), (h)), (v))) > > /* PX30 GRF CONFIGS */ > #define PX30_I2S0_CLK_IN_SRC_FROM_TX HIWORD_UPDATE(1, 13, 12) -- Jani Nikula, Intel