drm/armada: add missing interlaced support for overlay frame

Interlaced support has been missing from the overlay frame, which is
sub-optimal.  Add support for this missing feature.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

diff --git a/drivers/gpu/drm/armada/armada_overlay.c b/drivers/gpu/drm/armada/armada_overlay.c
index 589cdb6..d8d6e46 100644 (file)
--- a/drivers/gpu/drm/armada/armada_overlay.c
+++ b/drivers/gpu/drm/armada/armada_overlay.c
@@ -106,12 +106,13 @@ static void armada_drm_overlay_plane_atomic_update(struct drm_plane *plane,
        /* FIXME: overlay on an interlaced display */
        if (old_state->src.x1 != state->src.x1 ||
            old_state->src.y1 != state->src.y1 ||
-           old_state->fb != state->fb) {
+           old_state->fb != state->fb ||
+           state->crtc->state->mode_changed) {
                const struct drm_format_info *format;
                u16 src_x, pitches[3];
                u32 addrs[2][3];
 
-               armada_drm_plane_calc(state, addrs, pitches, false);
+               armada_drm_plane_calc(state, addrs, pitches, dcrtc->interlaced);
 
                armada_reg_queue_set(regs, idx, addrs[0][0],
                                     LCD_SPU_DMA_START_ADDR_Y0);
@@ -146,6 +147,8 @@ static void armada_drm_overlay_plane_atomic_update(struct drm_plane *plane,
                src_x = state->src.x1 >> 16;
                if (format->num_planes == 1 && src_x & (format->hsub - 1))
                        cfg ^= CFG_DMA_MOD(CFG_SWAPUV);
+               if (dcrtc->interlaced)
+                       cfg |= CFG_DMA_FTOGGLE;
                cfg_mask = CFG_CBSH_ENA | CFG_DMAFORMAT |
                           CFG_DMA_MOD(CFG_SWAPRB | CFG_SWAPUV |
                                       CFG_SWAPYU | CFG_YUV2RGB) |