diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2020-07-07 10:24:09 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2020-07-14 09:14:06 +0200 |
| commit | 70c3881eedd072c4df88b662dc1362a63baa6a91 (patch) | |
| tree | 9feb009e2b559aa498a9c62176a4acf8aae33c14 /drivers/gpu/drm/mgag200 | |
| parent | 153fef4115e886de8db2e5c58dc3bc63e7a68a09 (diff) | |
drm/mgag200: Set/clear <syncrst> field in display enable/disable helpers
Modifying the <syncrst> field in mgag200_{enable,disable}_display()
makes the code more readable. Also clear the <asyncrst> field to enable
the display. The other bits in SEQ0 are unused, so no functional changes
are made.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200707082411.6583-6-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/mgag200')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_mode.c | 17 | ||||
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_reg.h | 3 |
2 files changed, 14 insertions, 6 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 05f8aa50b908..679eb5abe24d 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -1284,7 +1284,12 @@ static void mgag200_g200ev_set_hiprilvl(struct mga_device *mdev) static void mgag200_enable_display(struct mga_device *mdev) { - u8 seq1, crtcext1; + u8 seq0, seq1, crtcext1; + + RREG_SEQ(0x00, seq0); + seq0 |= MGAREG_SEQ0_SYNCRST | + MGAREG_SEQ0_ASYNCRST; + WREG_SEQ(0x00, seq0); /* * TODO: replace busy waiting with vblank IRQ; put @@ -1307,7 +1312,11 @@ static void mgag200_enable_display(struct mga_device *mdev) static void mgag200_disable_display(struct mga_device *mdev) { - u8 seq1, crtcext1; + u8 seq0, seq1, crtcext1; + + RREG_SEQ(0x00, seq0); + seq0 &= ~MGAREG_SEQ0_SYNCRST; + WREG_SEQ(0x00, seq0); /* * TODO: replace busy waiting with vblank IRQ; put @@ -1338,9 +1347,6 @@ static void mga_crtc_prepare(struct drm_crtc *crtc) struct drm_device *dev = crtc->dev; struct mga_device *mdev = to_mga_device(dev); - /* start sync reset */ - WREG_SEQ(0, 1); - if (mdev->type == G200_WB || mdev->type == G200_EW3) mga_g200wb_prepare(crtc); } @@ -1357,7 +1363,6 @@ static void mga_crtc_commit(struct drm_crtc *crtc) if (mdev->type == G200_WB || mdev->type == G200_EW3) mga_g200wb_commit(crtc); - WREG_SEQ(0, 0x3); mga_crtc_load_lut(crtc); mgag200_enable_display(mdev); } diff --git a/drivers/gpu/drm/mgag200/mgag200_reg.h b/drivers/gpu/drm/mgag200/mgag200_reg.h index 9f0be1878854..c3b7bcad52ed 100644 --- a/drivers/gpu/drm/mgag200/mgag200_reg.h +++ b/drivers/gpu/drm/mgag200/mgag200_reg.h @@ -236,6 +236,9 @@ #define MGAREG_SEQ_INDEX 0x1fc4 #define MGAREG_SEQ_DATA 0x1fc5 +#define MGAREG_SEQ0_ASYNCRST BIT(0) +#define MGAREG_SEQ0_SYNCRST BIT(1) + #define MGAREG_SEQ1_SCROFF BIT(5) #define MGAREG_CRTC_INDEX 0x1fd4 |