drm/radeon: fix dual-head on rv250

Plugged in FireMV with the rv250 on it, and the second crtc/dac didn't work,
we were reading/writing different registers than we were modifying in the code.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 9 insertions, 13 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
index 5b07b8848e09..bad77f40a9da 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
@@ -928,16 +928,14 @@ static void radeon_legacy_tv_dac_mode_set(struct drm_encoder *encoder,
         if (ASIC_IS_R300(rdev)) {
                 gpiopad_a = RREG32(RADEON_GPIOPAD_A) | 1;
                 disp_output_cntl = RREG32(RADEON_DISP_OUTPUT_CNTL);
-        }
-
-        if (rdev->family == CHIP_R200 || ASIC_IS_R300(rdev))
-                disp_tv_out_cntl = RREG32(RADEON_DISP_TV_OUT_CNTL);
-        else
+        } else if (rdev->family != CHIP_R200)
                 disp_hw_debug = RREG32(RADEON_DISP_HW_DEBUG);
-
-        if (rdev->family == CHIP_R200)
+        else if (rdev->family == CHIP_R200)
                 fp2_gen_cntl = RREG32(RADEON_FP2_GEN_CNTL);
 
+        if (rdev->family >= CHIP_R200)
+                disp_tv_out_cntl = RREG32(RADEON_DISP_TV_OUT_CNTL);
+
         if (is_tv) {
                 uint32_t dac_cntl;
 
@@ -1002,15 +1000,13 @@ static void radeon_legacy_tv_dac_mode_set(struct drm_encoder *encoder,
         if (ASIC_IS_R300(rdev)) {
                 WREG32_P(RADEON_GPIOPAD_A, gpiopad_a, ~1);
                 WREG32(RADEON_DISP_OUTPUT_CNTL, disp_output_cntl);
-        }
+        } else if (rdev->family != CHIP_R200)
+                WREG32(RADEON_DISP_HW_DEBUG, disp_hw_debug);
+        else if (rdev->family == CHIP_R200)
+                WREG32(RADEON_FP2_GEN_CNTL, fp2_gen_cntl);
 
         if (rdev->family >= CHIP_R200)
                 WREG32(RADEON_DISP_TV_OUT_CNTL, disp_tv_out_cntl);
-        else
-                WREG32(RADEON_DISP_HW_DEBUG, disp_hw_debug);
-
-        if (rdev->family == CHIP_R200)
-                WREG32(RADEON_FP2_GEN_CNTL, fp2_gen_cntl);
 
         if (is_tv)
                 radeon_legacy_tv_mode_set(encoder, mode, adjusted_mode);