diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2024-07-18 12:44:15 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2024-07-19 10:40:21 +0200 |
| commit | 5cd522b5331b348302fe410dab1cd070e4fd6998 (patch) | |
| tree | 8bed68d7db1574761e9c76db293b180dc21cecb7 /drivers/gpu/drm/mgag200 | |
| parent | d6460bd52c27fde97d6a73e3d9c7a8d747fbaa3e (diff) | |
drm/mgag200: Add dedicted variable for <linecomp> field
Replace the line-compare value of <vdispend> with a dedicated variable
<linecomp>. Improves readability and prepares for vblank support.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240718104551.575912-6-tzimmermann@suse.de
Diffstat (limited to 'drivers/gpu/drm/mgag200')
| -rw-r--r-- | drivers/gpu/drm/mgag200/mgag200_mode.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c index 89bb869b3090..ff90f29b0612 100644 --- a/drivers/gpu/drm/mgag200/mgag200_mode.c +++ b/drivers/gpu/drm/mgag200/mgag200_mode.c @@ -206,6 +206,7 @@ void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mod { unsigned int hdispend, hsyncstr, hsyncend, htotal, hblkstr, hblkend; unsigned int vdispend, vsyncstr, vsyncend, vtotal, vblkstr, vblkend; + unsigned int linecomp; u8 misc, crtcext1, crtcext2, crtcext5; hdispend = mode->crtc_hdisplay / 8 - 1; @@ -225,6 +226,8 @@ void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mod vblkstr = mode->crtc_vblank_start; vblkend = vtotal + 1; + linecomp = vdispend; + misc = RREG8(MGA_MISC_IN); if (mode->flags & DRM_MODE_FLAG_NHSYNC) @@ -249,7 +252,7 @@ void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mod ((vdispend & 0x400) >> 8) | ((vblkstr & 0xc00) >> 7) | ((vsyncstr & 0xc00) >> 5) | - ((vdispend & 0x400) >> 3); + ((linecomp & 0x400) >> 3); crtcext5 = 0x00; WREG_CRT(0x00, htotal - 4); @@ -263,12 +266,12 @@ void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mod ((vdispend & 0x100) >> 7) | ((vsyncstr & 0x100) >> 6) | ((vblkstr & 0x100) >> 5) | - ((vdispend & 0x100) >> 4) | /* linecomp */ + ((linecomp & 0x100) >> 4) | ((vtotal & 0x200) >> 4) | ((vdispend & 0x200) >> 3) | ((vsyncstr & 0x200) >> 2)); WREG_CRT(0x09, ((vblkstr & 0x200) >> 4) | - ((vdispend & 0x200) >> 3)); + ((linecomp & 0x200) >> 3)); WREG_CRT(0x10, vsyncstr & 0xff); WREG_CRT(0x11, (vsyncend & 0x0f) | 0x20); WREG_CRT(0x12, vdispend & 0xff); @@ -276,7 +279,7 @@ void mgag200_set_mode_regs(struct mga_device *mdev, const struct drm_display_mod WREG_CRT(0x15, vblkstr & 0xff); WREG_CRT(0x16, vblkend & 0xff); WREG_CRT(0x17, 0xc3); - WREG_CRT(0x18, vdispend & 0xff); + WREG_CRT(0x18, linecomp & 0xff); WREG_ECRT(0x01, crtcext1); WREG_ECRT(0x02, crtcext2); |