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path: root/drivers/gpu/drm/udl/udl_modeset.c
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Diffstat (limited to 'drivers/gpu/drm/udl/udl_modeset.c')
-rw-r--r--drivers/gpu/drm/udl/udl_modeset.c46
1 files changed, 38 insertions, 8 deletions
diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c
index 0d7816789da1..f5dd89e891de 100644
--- a/drivers/gpu/drm/udl/udl_modeset.c
+++ b/drivers/gpu/drm/udl/udl_modeset.c
@@ -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 {
@@ -251,7 +279,7 @@ static void udl_crtc_dpms(struct drm_crtc *crtc, int mode)
}
static bool udl_crtc_mode_fixup(struct drm_crtc *crtc,
- struct drm_display_mode *mode,
+ const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
@@ -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);