drm/rockchip: vop2: switch to FIELD_PREP_WM16 macro

The era of hand-rolled HIWORD_UPDATE macros is over, at least for those
drivers that use constant masks.

Remove VOP2's HIWORD_UPDATE macro from the vop2 header file, and replace
all instances in rockchip_vop2_reg.c (the only user of this particular
HIWORD_UPDATE definition) with equivalent FIELD_PREP_WM16 instances. This
gives us better error checking.

Reviewed-by: Cristian Ciocaltea <[e-mail]>
Tested-by: Cristian Ciocaltea <[e-mail]>
Signed-off-by: Nicolas Frattaroli <[e-mail]>
Reviewed-by: Heiko Stuebner <[e-mail]>
Signed-off-by: Yury Norov (NVIDIA) <[e-mail]>

drivers/gpu/drm/rockchip/rockchip_drm_vop2.h

···
 #define WIN_FEATURE_AFBDC		BIT(0)
 #define WIN_FEATURE_CLUSTER		BIT(1)
 
-#define HIWORD_UPDATE(v, h, l)  ((GENMASK(h, l) << 16) | ((v) << (l)))
 /*
  *  the delay number of a window in different mode.
  */

drivers/gpu/drm/rockchip/rockchip_vop2_reg.c

···
 #include <linux/bitfield.h>
 #include <linux/kernel.h>
 #include <linux/component.h>
+#include <linux/hw_bitfield.h>
 #include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
 #include <linux/of.h>
···
 		die |= RK3588_SYS_DSP_INFACE_EN_HDMI0 |
 			    FIELD_PREP(RK3588_SYS_DSP_INFACE_EN_EDP_HDMI0_MUX, vp->id);
 		val = rk3588_get_hdmi_pol(polflags);
-		regmap_write(vop2->vop_grf, RK3588_GRF_VOP_CON2, HIWORD_UPDATE(1, 1, 1));
-		regmap_write(vop2->vo1_grf, RK3588_GRF_VO1_CON0, HIWORD_UPDATE(val, 6, 5));
+		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));
 		break;
 	case ROCKCHIP_VOP2_EP_HDMI1:
 		div &= ~RK3588_DSP_IF_EDP_HDMI1_DCLK_DIV;
···
 		die |= RK3588_SYS_DSP_INFACE_EN_HDMI1 |
 			    FIELD_PREP(RK3588_SYS_DSP_INFACE_EN_EDP_HDMI1_MUX, vp->id);
 		val = rk3588_get_hdmi_pol(polflags);
-		regmap_write(vop2->vop_grf, RK3588_GRF_VOP_CON2, HIWORD_UPDATE(1, 4, 4));
-		regmap_write(vop2->vo1_grf, RK3588_GRF_VO1_CON0, HIWORD_UPDATE(val, 8, 7));
+		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));
 		break;
 	case ROCKCHIP_VOP2_EP_EDP0:
 		div &= ~RK3588_DSP_IF_EDP_HDMI0_DCLK_DIV;
···
 		die &= ~RK3588_SYS_DSP_INFACE_EN_EDP_HDMI0_MUX;
 		die |= RK3588_SYS_DSP_INFACE_EN_EDP0 |
 			   FIELD_PREP(RK3588_SYS_DSP_INFACE_EN_EDP_HDMI0_MUX, vp->id);
-		regmap_write(vop2->vop_grf, RK3588_GRF_VOP_CON2, HIWORD_UPDATE(1, 0, 0));
+		regmap_write(vop2->vop_grf, RK3588_GRF_VOP_CON2, FIELD_PREP_WM16(BIT(0), 1));
 		break;
 	case ROCKCHIP_VOP2_EP_EDP1:
 		div &= ~RK3588_DSP_IF_EDP_HDMI1_DCLK_DIV;
···
 		die &= ~RK3588_SYS_DSP_INFACE_EN_EDP_HDMI1_MUX;
 		die |= RK3588_SYS_DSP_INFACE_EN_EDP1 |
 			   FIELD_PREP(RK3588_SYS_DSP_INFACE_EN_EDP_HDMI1_MUX, vp->id);
-		regmap_write(vop2->vop_grf, RK3588_GRF_VOP_CON2, HIWORD_UPDATE(1, 3, 3));
+		regmap_write(vop2->vop_grf, RK3588_GRF_VOP_CON2, FIELD_PREP_WM16(BIT(3), 1));
 		break;
 	case ROCKCHIP_VOP2_EP_MIPI0:
 		div &= ~RK3588_DSP_IF_MIPI0_PCLK_DIV;