drm/radeon/kms: fix typo in read_disabled vbios code

BUS_CNTL reg and bits moved between pre-PCIE and PCIE asics.
Signed-off-by: NAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: NDave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_bios.c

@@ -331,7 +331,7 @@ static bool avivo_read_disabled_bios(struct radeon_device *rdev)
 
 	seprom_cntl1 = RREG32(RADEON_SEPROM_CNTL1);
 	viph_control = RREG32(RADEON_VIPH_CONTROL);
-	bus_cntl = RREG32(RADEON_BUS_CNTL);
+	bus_cntl = RREG32(RV370_BUS_CNTL);
 	d1vga_control = RREG32(AVIVO_D1VGA_CONTROL);
 	d2vga_control = RREG32(AVIVO_D2VGA_CONTROL);
 	vga_render_control = RREG32(AVIVO_VGA_RENDER_CONTROL);
@@ -350,7 +350,7 @@ static bool avivo_read_disabled_bios(struct radeon_device *rdev)
 	WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 
 	/* enable the rom */
-	WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
+	WREG32(RV370_BUS_CNTL, (bus_cntl & ~RV370_BUS_BIOS_DIS_ROM));
 
 	/* Disable VGA mode */
 	WREG32(AVIVO_D1VGA_CONTROL,
@@ -367,7 +367,7 @@ static bool avivo_read_disabled_bios(struct radeon_device *rdev)
 	/* restore regs */
 	WREG32(RADEON_SEPROM_CNTL1, seprom_cntl1);
 	WREG32(RADEON_VIPH_CONTROL, viph_control);
-	WREG32(RADEON_BUS_CNTL, bus_cntl);
+	WREG32(RV370_BUS_CNTL, bus_cntl);
 	WREG32(AVIVO_D1VGA_CONTROL, d1vga_control);
 	WREG32(AVIVO_D2VGA_CONTROL, d2vga_control);
 	WREG32(AVIVO_VGA_RENDER_CONTROL, vga_render_control);
@@ -390,6 +390,9 @@ static bool legacy_read_disabled_bios(struct radeon_device *rdev)
 
 	seprom_cntl1 = RREG32(RADEON_SEPROM_CNTL1);
 	viph_control = RREG32(RADEON_VIPH_CONTROL);
+	if (rdev->flags & RADEON_IS_PCIE)
+		bus_cntl = RREG32(RV370_BUS_CNTL);
+	else
 		bus_cntl = RREG32(RADEON_BUS_CNTL);
 	crtc_gen_cntl = RREG32(RADEON_CRTC_GEN_CNTL);
 	crtc2_gen_cntl = 0;
@@ -412,6 +415,9 @@ static bool legacy_read_disabled_bios(struct radeon_device *rdev)
 	WREG32(RADEON_VIPH_CONTROL, (viph_control & ~RADEON_VIPH_EN));
 
 	/* enable the rom */
+	if (rdev->flags & RADEON_IS_PCIE)
+		WREG32(RV370_BUS_CNTL, (bus_cntl & ~RV370_BUS_BIOS_DIS_ROM));
+	else
 		WREG32(RADEON_BUS_CNTL, (bus_cntl & ~RADEON_BUS_BIOS_DIS_ROM));
 
 	/* Turn off mem requests and CRTC for both controllers */
@@ -439,6 +445,9 @@ static bool legacy_read_disabled_bios(struct radeon_device *rdev)
 	/* restore regs */
 	WREG32(RADEON_SEPROM_CNTL1, seprom_cntl1);
 	WREG32(RADEON_VIPH_CONTROL, viph_control);
+	if (rdev->flags & RADEON_IS_PCIE)
+		WREG32(RV370_BUS_CNTL, bus_cntl);
+	else
 		WREG32(RADEON_BUS_CNTL, bus_cntl);
 	WREG32(RADEON_CRTC_GEN_CNTL, crtc_gen_cntl);
 	if (!(rdev->flags & RADEON_SINGLE_CRTC)) {

drivers/gpu/drm/radeon/radeon_reg.h

@@ -300,6 +300,8 @@
 #       define RADEON_BUS_READ_BURST         (1 << 30)
 #define RADEON_BUS_CNTL1                    0x0034
 #       define RADEON_BUS_WAIT_ON_LOCK_EN    (1 << 4)
+#define RV370_BUS_CNTL                      0x004c
+#       define RV370_BUS_BIOS_DIS_ROM        (1 << 2)
 /* rv370/rv380, rv410, r423/r430/r480, r5xx */
 #define RADEON_MSI_REARM_EN		    0x0160
 #	define RV370_MSI_REARM_EN	     (1 << 0)