From e9b4b43fe2ec157f7d402c1efb855679711d47fc Mon Sep 17 00:00:00 2001 From: HuangRan Date: Tue, 19 Apr 2016 09:34:41 +0800 Subject: [PATCH] Fix VX900 HDMI port no display issue Remove the write of bit6 for VGA/SVGA CRT Controller Register 0xFD (IGA1 Scaling Up and Timing Control). Bit6 of CRTC 0xFD is RO bit which can't be written. Verfied on VX900 board for HDMI port. Signed-off-by: Hu, Yi Signed-off-by: Huang, Ran --- drivers/gpu/drm/via/via_crtc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/via/via_crtc.c b/drivers/gpu/drm/via/via_crtc.c index fa29270..a50e654 100644 --- a/drivers/gpu/drm/via/via_crtc.c +++ b/drivers/gpu/drm/via/via_crtc.c @@ -468,7 +468,7 @@ void via_load_crtc_pixel_timing(struct drm_crtc *crtc, struct drm_display_mode * svga_wcrt_mask(VGABASE, 0x32, 0x00, BIT(2)); } - svga_wcrt_mask(VGABASE, 0xFD, BIT(5) | BIT(6), BIT(5) | BIT(6)); + svga_wcrt_mask(VGABASE, 0xFD, BIT(5), BIT(5)); } /* Load CRTC timing registers */ @@ -484,7 +484,7 @@ void via_load_crtc_timing(struct via_crtc *iga, struct drm_display_mode *mode) svga_wcrt_mask(VGABASE, 0x45, 0x00, BIT(0)); /* Disable IGA1 pixel timing */ - svga_wcrt_mask(VGABASE, 0xFD, 0x00, BIT(6) | BIT(5)); + svga_wcrt_mask(VGABASE, 0xFD, 0x00, BIT(5)); } reg_value = IGA1_HOR_TOTAL_FORMULA(mode->crtc_htotal); -- 1.9.1