OMAPDSS: DISPC: remove OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES

DISPC can drive data lines either on rising or falling pixel clock edge,
which can be configured by the user.

Sync lines can also be driven on rising or falling pixel clock edge, but
additionally the HW can be configured to drive the sync lines on
opposite clock edge from the data lines.

This opposite edge setting does not make any sense, as the same effect
can be achieved by just setting the sync lines to be driven on the other
edge compared to the data lines. It feels like some kind of backward
compatibility option, even if all DSS versions seem to have the same
implementation.

To simplify the code and configuration of the signals, and to make the
dispc timings more compatible with what is used on other platforms,
let's just remove the whole opposite-edge support.

The drivers that used OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES setting are
changed so that they use the opposite setting from the data edge.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

4 files changed, 8 insertions, 10 deletions

diff --git a/drivers/video/fbdev/omap2/dss/dispc.c b/drivers/video/fbdev/omap2/dss/dispc.c
index a19a1d4b2d19..11bd780fcdfa 100644
--- a/drivers/video/fbdev/omap2/dss/dispc.c
+++ b/drivers/video/fbdev/omap2/dss/dispc.c
@@ -2934,22 +2934,18 @@ static void _dispc_mgr_set_lcd_timings(enum omap_channel channel, int hsw,
 	case OMAPDSS_DRIVE_SIG_FALLING_EDGE:
 		ipc = true;
 		break;
-	case OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES:
 	default:
 		BUG();
 	}
 
+	/* always use the 'rf' setting */
+	onoff = true;
+
 	switch (sync_pclk_edge) {
-	case OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES:
-		onoff = false;
-		rf = false;
-		break;
 	case OMAPDSS_DRIVE_SIG_FALLING_EDGE:
-		onoff = true;
 		rf = false;
 		break;
 	case OMAPDSS_DRIVE_SIG_RISING_EDGE:
-		onoff = true;
 		rf = true;
 		break;
 	default:
diff --git a/drivers/video/fbdev/omap2/dss/display.c b/drivers/video/fbdev/omap2/dss/display.c
index 2412a0dd0c13..a6fd2d35ad60 100644
--- a/drivers/video/fbdev/omap2/dss/display.c
+++ b/drivers/video/fbdev/omap2/dss/display.c
@@ -295,7 +295,9 @@ void videomode_to_omap_video_timings(const struct videomode *vm,
 		OMAPDSS_DRIVE_SIG_RISING_EDGE :
 		OMAPDSS_DRIVE_SIG_FALLING_EDGE;
 
-	ovt->sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
+	ovt->sync_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ?
+		OMAPDSS_DRIVE_SIG_FALLING_EDGE :
+		OMAPDSS_DRIVE_SIG_RISING_EDGE;
 }
 EXPORT_SYMBOL(videomode_to_omap_video_timings);
 
diff --git a/drivers/video/fbdev/omap2/dss/dsi.c b/drivers/video/fbdev/omap2/dss/dsi.c
index 5081f6fb1737..28b0bc11669d 100644
--- a/drivers/video/fbdev/omap2/dss/dsi.c
+++ b/drivers/video/fbdev/omap2/dss/dsi.c
@@ -4137,7 +4137,7 @@ static int dsi_display_init_dispc(struct platform_device *dsidev,
 	dsi->timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 	dsi->timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
 	dsi->timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
-	dsi->timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
+	dsi->timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
 
 	dss_mgr_set_timings(mgr, &dsi->timings);
 
diff --git a/drivers/video/fbdev/omap2/dss/rfbi.c b/drivers/video/fbdev/omap2/dss/rfbi.c
index 28e694b11ff9..065effca9236 100644
--- a/drivers/video/fbdev/omap2/dss/rfbi.c
+++ b/drivers/video/fbdev/omap2/dss/rfbi.c
@@ -869,7 +869,7 @@ static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
 	rfbi.timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
 	rfbi.timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
 	rfbi.timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
-	rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES;
+	rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
 
 	dss_mgr_set_timings(mgr, &rfbi.timings);
 }