Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5bd42f69 authored by Dave Airlie's avatar Dave Airlie
Browse files

drm/udl: port over blanking code from udlfb.



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

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 197bbb3d
Loading
Loading
Loading
Loading
+37 −7
Original line number Diff line number Diff line
@@ -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);