diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2020-05-15 10:32:27 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-05-19 09:41:33 +0200 |
| commit | 2e5ccbbaeaa47d109407883c16fcbbe84071a943 (patch) | |
| tree | 6ba67c0c8d57f4f361f5e6f999228f208dcf3d91 /drivers/gpu/drm/mgag200 | |
| parent | 836d536881cc8e229dd6d7dfb72a70f5768c57c6 (diff) | |
| download | linux-2e5ccbbaeaa47d109407883c16fcbbe84071a943.tar.bz2 | |
drm/mgag200: Move TAGFIFO reset into separate function
The TAGFIFO state is now reset in mgag200_g200er_reset_tagfifo().
v2:
* define MGAREG_SEQ1_SCROFF
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Tested-by: John Donnelly <John.p.donnelly@oracle.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Emil Velikov <emil.velikov@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200515083233.32036-10-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/mgag200')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_drv.h | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_mode.c | 45 | ||||
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_reg.h | 3 |
3 files changed, 38 insertions, 16 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h index 1963876ef3b8..cf71a4ec8415 100644 --- a/drivers/gpu/drm/mgag200/mgag200_drv.h +++ b/drivers/gpu/drm/mgag200/mgag200_drv.h @@ -49,6 +49,12 @@ WREG8(ATTR_DATA, v); \ } while (0) \ +#define RREG_SEQ(reg, v) \ + do { \ + WREG8(MGAREG_SEQ_INDEX, reg); \ + v = RREG8(MGAREG_SEQ_DATA); \ + } while (0) \ + #define WREG_SEQ(reg, v) \ do { \ WREG8(MGAREG_SEQ_INDEX, reg); \ 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)) { diff --git a/drivers/gpu/drm/mgag200/mgag200_reg.h b/drivers/gpu/drm/mgag200/mgag200_reg.h index cd08dee29b06..29f7194faadc 100644 --- a/drivers/gpu/drm/mgag200/mgag200_reg.h +++ b/drivers/gpu/drm/mgag200/mgag200_reg.h @@ -235,6 +235,9 @@ /* MMIO VGA registers */ #define MGAREG_SEQ_INDEX 0x1fc4 #define MGAREG_SEQ_DATA 0x1fc5 + +#define MGAREG_SEQ1_SCROFF BIT(5) + #define MGAREG_CRTC_INDEX 0x1fd4 #define MGAREG_CRTC_DATA 0x1fd5 #define MGAREG_CRTCEXT_INDEX 0x1fde |