drm/radeon: add helpers for masking and setting bits in regs

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/r600_hdmi.c

@@ -437,17 +437,15 @@ void r600_hdmi_enable(struct drm_encoder *encoder)
 		hdmi = HDMI0_ERROR_ACK | HDMI0_ENABLE;
 		switch (radeon_encoder->encoder_id) {
 		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
-			WREG32_P(AVIVO_TMDSA_CNTL, AVIVO_TMDSA_CNTL_HDMI_EN,
-				 ~AVIVO_TMDSA_CNTL_HDMI_EN);
+			WREG32_OR(AVIVO_TMDSA_CNTL, AVIVO_TMDSA_CNTL_HDMI_EN);
 			hdmi |= HDMI0_STREAM(HDMI0_STREAM_TMDSA);
 			break;
 		case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
-			WREG32_P(AVIVO_LVTMA_CNTL, AVIVO_LVTMA_CNTL_HDMI_EN,
-				 ~AVIVO_LVTMA_CNTL_HDMI_EN);
+			WREG32_OR(AVIVO_LVTMA_CNTL, AVIVO_LVTMA_CNTL_HDMI_EN);
 			hdmi |= HDMI0_STREAM(HDMI0_STREAM_LVTMA);
 			break;
 		case ENCODER_OBJECT_ID_INTERNAL_DDI:
-			WREG32_P(DDIA_CNTL, DDIA_HDMI_EN, ~DDIA_HDMI_EN);
+			WREG32_OR(DDIA_CNTL, DDIA_HDMI_EN);
 			hdmi |= HDMI0_STREAM(HDMI0_STREAM_DDIA);
 			break;
 		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
@@ -504,15 +502,13 @@ void r600_hdmi_disable(struct drm_encoder *encoder)
 	if (rdev->family >= CHIP_R600 && !ASIC_IS_DCE3(rdev)) {
 		switch (radeon_encoder->encoder_id) {
 		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
-			WREG32_P(AVIVO_TMDSA_CNTL, 0,
-				 ~AVIVO_TMDSA_CNTL_HDMI_EN);
+			WREG32_AND(AVIVO_TMDSA_CNTL, ~AVIVO_TMDSA_CNTL_HDMI_EN);
 			break;
 		case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
-			WREG32_P(AVIVO_LVTMA_CNTL, 0,
-				 ~AVIVO_LVTMA_CNTL_HDMI_EN);
+			WREG32_AND(AVIVO_LVTMA_CNTL, ~AVIVO_LVTMA_CNTL_HDMI_EN);
 			break;
 		case ENCODER_OBJECT_ID_INTERNAL_DDI:
-			WREG32_P(DDIA_CNTL, 0, ~DDIA_HDMI_EN);
+			WREG32_AND(DDIA_CNTL, ~DDIA_HDMI_EN);
 			break;
 		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
 			break;

drivers/gpu/drm/radeon/radeon.h

@@ -1741,6 +1741,8 @@ void r100_io_wreg(struct radeon_device *rdev, u32 reg, u32 v);
 		tmp_ |= ((val) & ~(mask));			\
 		WREG32(reg, tmp_);				\
 	} while (0)
+#define WREG32_AND(reg, and) WREG32_P(reg, 0, and)
+#define WREG32_OR(reg, or) WREG32_P(reg, or, ~or)
 #define WREG32_PLL_P(reg, val, mask)				\
 	do {							\
 		uint32_t tmp_ = RREG32_PLL(reg);		\