diff options
| author | Kevin Brace <kevinbrace@gmx.com> | 2021-12-27 16:36:53 -0600 |
|---|---|---|
| committer | Kevin Brace <kevinbrace@gmx.com> | 2021-12-27 16:36:53 -0600 |
| commit | 3bef18990ed2769442be8e501262330f83d9c0a6 (patch) | |
| tree | 90553867625e076c87271dc197fddf982bcd7b29 | |
| parent | dbf5833e08f3d63d0a3b23b4a3011766b1fc6514 (diff) | |
drm/openchrome: Dual head fix for atomic mode setting
Simultaneous display needs to be disabled for dual head (IGA1 and IGA2)
mode to function properly.
Signed-off-by: Kevin Brace <kevinbrace@gmx.com>
| -rw-r--r-- | drivers/gpu/drm/openchrome/openchrome_crtc.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/openchrome/openchrome_crtc.c b/drivers/gpu/drm/openchrome/openchrome_crtc.c index 509828254bf3..b65e72d0414c 100644 --- a/drivers/gpu/drm/openchrome/openchrome_crtc.c +++ b/drivers/gpu/drm/openchrome/openchrome_crtc.c @@ -79,6 +79,17 @@ static void via_iga_common_init(void __iomem *regs) * 1: Enable */ svga_wseq_mask(regs, 0x15, BIT(5) | BIT(1), BIT(5) | BIT(1)); + /* + * Disable simultaneous display. + * Turning this on causes IGA1 to have a display issue. + */ + /* + * 3X5.6B[3] - Simultaneous Display Enable + * 0: Disable + * 1: Enable + */ + svga_wcrt_mask(regs, 0x6B, 0x00, BIT(3)); + DRM_DEBUG_KMS("Exiting %s.\n", __func__); } |