diff options
Diffstat (limited to 'drivers/gpu/drm/mgag200/mgag200_mode.c')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_mode.c | 45 |
1 files changed, 29 insertions, 16 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 38556f57ad21..68ae60492675 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -1106,6 +1106,33 @@ static void mgag200_set_format_regs(struct mga_device *mdev, WREG_ECRT(3, crtcext3); } +static void mgag200_g200er_reset_tagfifo(struct mga_device *mdev) +{ + static uint32_t RESET_FLAG = 0x00200000; /* undocumented magic value */ + u8 seq1; + u32 memctl; + + /* screen off */ + RREG_SEQ(0x01, seq1); + seq1 |= MGAREG_SEQ1_SCROFF; + WREG_SEQ(0x01, seq1); + + memctl = RREG32(MGAREG_MEMCTL); + + memctl |= RESET_FLAG; + WREG32(MGAREG_MEMCTL, memctl); + + udelay(1000); + + memctl &= ~RESET_FLAG; + WREG32(MGAREG_MEMCTL, memctl); + + /* screen on */ + RREG_SEQ(0x01, seq1); + seq1 &= ~MGAREG_SEQ1_SCROFF; + WREG_SEQ(0x01, seq1); +} + static int mga_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode, @@ -1240,22 +1267,8 @@ static int mga_crtc_mode_set(struct drm_crtc *crtc, mgag200_set_mode_regs(mdev, mode); - /* reset tagfifo */ - if (mdev->type == G200_ER) { - u32 mem_ctl = RREG32(MGAREG_MEMCTL); - u8 seq1; - - /* screen off */ - WREG8(MGAREG_SEQ_INDEX, 0x01); - seq1 = RREG8(MGAREG_SEQ_DATA) | 0x20; - WREG8(MGAREG_SEQ_DATA, seq1); - - WREG32(MGAREG_MEMCTL, mem_ctl | 0x00200000); - udelay(1000); - WREG32(MGAREG_MEMCTL, mem_ctl & ~0x00200000); - - WREG8(MGAREG_SEQ_DATA, seq1 & ~0x20); - } + if (mdev->type == G200_ER) + mgag200_g200er_reset_tagfifo(mdev); if (IS_G200_SE(mdev)) { |