drm/omap: DISPC: support double-pixel mode

We need double-pixel mode (pixel repetition) for interlace modes. This
patch adds the necessary support to DISPC to output double-pixel mode.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
index 6b50476ec669c3c03d5806711933475fd999021d..1e7f26985bdae9375407bbaa350984c39141785f 100644 (file)
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -104,6 +104,8 @@ struct dispc_features {
        bool supports_sync_align:1;
 
        bool has_writeback:1;
+
+       bool supports_double_pixel:1;
 };
 
 #define DISPC_MAX_NR_FIFOS 5
@@ -3287,6 +3289,10 @@ void dispc_mgr_set_timings(enum omap_channel channel,
        } else {
                if (t.interlace)
                        t.y_res /= 2;
+
+               if (dispc.feat->supports_double_pixel)
+                       REG_FLD_MOD(DISPC_CONTROL, t.double_pixel ? 1 : 0,
+                               19, 17);
        }
 
        dispc_mgr_set_size(channel, t.x_res, t.y_res);
@@ -3951,6 +3957,7 @@ static const struct dispc_features omap44xx_dispc_feats = {
        .set_max_preload        =       true,
        .supports_sync_align    =       true,
        .has_writeback          =       true,
+       .supports_double_pixel  =       true,
 };
 
 static const struct dispc_features omap54xx_dispc_feats = {
@@ -3974,6 +3981,7 @@ static const struct dispc_features omap54xx_dispc_feats = {
        .set_max_preload        =       true,
        .supports_sync_align    =       true,
        .has_writeback          =       true,
+       .supports_double_pixel  =       true,
 };
 
 static int dispc_init_features(struct platform_device *pdev)

diff --git a/include/video/omapdss.h b/include/video/omapdss.h
index 86f28a92281ab89b541eba85438c978e59dd9ee1..6c1a3e1b4d555ddb21137b9faf4e75e9ea12baf8 100644 (file)
--- a/include/video/omapdss.h
+++ b/include/video/omapdss.h
@@ -367,6 +367,8 @@ struct omap_video_timings {
        enum omap_dss_signal_level de_level;
        /* Pixel clock edges to drive HSYNC and VSYNC signals */
        enum omap_dss_signal_edge sync_pclk_edge;
+
+       bool double_pixel;
 };
 
 /* Hardcoded timings for tv modes. Venc only uses these to