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drm/udl: port over blanking code from udlfb.

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This ports over the dpms code from udlfb, and should mean
a better chance of turning on some udl devices.

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2012-06-26 14:53:07 +01:00
parent 197bbb3d46
commit 5bd42f69fb
1 changed files with 37 additions and 7 deletions
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44
drivers/gpu/drm/udl/udl_modeset.c
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@ -45,12 +45,25 @@ static char *udl_vidreg_unlock(char *buf)
* 0x01 H and V sync off (screen blank but powered)
* 0x07 DPMS powerdown (requires modeset to come back)
*/
static char *udl_enable_hvsync(char *buf, bool enable)
static char *udl_set_blank(char *buf, int dpms_mode)
{
if (enable)
return udl_set_register(buf, 0x1F, 0x00);
else
return udl_set_register(buf, 0x1F, 0x07);
u8 reg;
switch (dpms_mode) {
case DRM_MODE_DPMS_OFF:
reg = 0x07;
break;
case DRM_MODE_DPMS_STANDBY:
reg = 0x05;
break;
case DRM_MODE_DPMS_SUSPEND:
reg = 0x01;
break;
case DRM_MODE_DPMS_ON:
reg = 0x00;
break;
}
return udl_set_register(buf, 0x1f, reg);
}
static char *udl_set_color_depth(char *buf, u8 selection)
@ -199,6 +212,20 @@ static char *udl_set_vid_cmds(char *wrptr, struct drm_display_mode *mode)
return wrptr;
}
static char *udl_dummy_render(char *wrptr)
{
*wrptr++ = 0xAF;
*wrptr++ = 0x6A; /* copy */
*wrptr++ = 0x00; /* from addr */
*wrptr++ = 0x00;
*wrptr++ = 0x00;
*wrptr++ = 0x01; /* one pixel */
*wrptr++ = 0x00; /* to address */
*wrptr++ = 0x00;
*wrptr++ = 0x00;
return wrptr;
}
static int udl_crtc_write_mode_to_hw(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
@ -235,9 +262,10 @@ static void udl_crtc_dpms(struct drm_crtc *crtc, int mode)
buf = (char *)urb->transfer_buffer;
buf = udl_vidreg_lock(buf);
buf = udl_enable_hvsync(buf, false);
buf = udl_set_blank(buf, mode);
buf = udl_vidreg_unlock(buf);
buf = udl_dummy_render(buf);
retval = udl_submit_urb(dev, urb, buf - (char *)
urb->transfer_buffer);
} else {
@ -306,9 +334,11 @@ static int udl_crtc_mode_set(struct drm_crtc *crtc,
wrptr = udl_set_base8bpp(wrptr, 2 * mode->vdisplay * mode->hdisplay);
wrptr = udl_set_vid_cmds(wrptr, adjusted_mode);
wrptr = udl_enable_hvsync(wrptr, true);
wrptr = udl_set_blank(wrptr, DRM_MODE_DPMS_ON);
wrptr = udl_vidreg_unlock(wrptr);
wrptr = udl_dummy_render(wrptr);
ufb->active_16 = true;
if (old_fb) {
struct udl_framebuffer *uold_fb = to_udl_fb(old_fb);