drm/radeon/kms/atom: get better min pixel clock info
Where supported use ulMinPixelClockPLL_Output rather than
usMinPixelClockPLL_Output for pll_out_min. This seems to
improve pll selection on some boards.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 79d4b77..cec6791 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -641,8 +641,12 @@
le16_to_cpu(firmware_info->info.usReferenceClock);
p1pll->reference_div = 0;
- p1pll->pll_out_min =
- le16_to_cpu(firmware_info->info.usMinPixelClockPLL_Output);
+ if (crev < 2)
+ p1pll->pll_out_min =
+ le16_to_cpu(firmware_info->info.usMinPixelClockPLL_Output);
+ else
+ p1pll->pll_out_min =
+ le32_to_cpu(firmware_info->info_12.ulMinPixelClockPLL_Output);
p1pll->pll_out_max =
le32_to_cpu(firmware_info->info.ulMaxPixelClockPLL_Output);