omapfb: Remove unused writeback code

Remove unused writeback code. This code will never be used, as omapfb is
being deprecated.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200313122410.7528-1-tomi.valkeinen@ti.com

drivers/video/fbdev/omap2/omapfb/dss/dispc.c

@@ -557,11 +557,6 @@ u32 dispc_mgr_get_sync_lost_irq(enum omap_channel channel)
 }
 EXPORT_SYMBOL(dispc_mgr_get_sync_lost_irq);
 
-u32 dispc_wb_get_framedone_irq(void)
-{
-	return DISPC_IRQ_FRAMEDONEWB;
-}
-
 bool dispc_mgr_go_busy(enum omap_channel channel)
 {
 	return mgr_fld_read(channel, DISPC_MGR_FLD_GO) == 1;
@@ -579,30 +574,6 @@ void dispc_mgr_go(enum omap_channel channel)
 }
 EXPORT_SYMBOL(dispc_mgr_go);
 
-bool dispc_wb_go_busy(void)
-{
-	return REG_GET(DISPC_CONTROL2, 6, 6) == 1;
-}
-
-void dispc_wb_go(void)
-{
-	enum omap_plane plane = OMAP_DSS_WB;
-	bool enable, go;
-
-	enable = REG_GET(DISPC_OVL_ATTRIBUTES(plane), 0, 0) == 1;
-
-	if (!enable)
-		return;
-
-	go = REG_GET(DISPC_CONTROL2, 6, 6) == 1;
-	if (go) {
-		DSSERR("GO bit not down for WB\n");
-		return;
-	}
-
-	REG_FLD_MOD(DISPC_CONTROL2, 1, 6, 6);
-}
-
 static void dispc_ovl_write_firh_reg(enum omap_plane plane, int reg, u32 value)
 {
 	dispc_write_reg(DISPC_OVL_FIR_COEF_H(plane, reg), value);
@@ -1028,13 +999,6 @@ static enum omap_channel dispc_ovl_get_channel_out(enum omap_plane plane)
 	}
 }
 
-void dispc_wb_set_channel_in(enum dss_writeback_channel channel)
-{
-	enum omap_plane plane = OMAP_DSS_WB;
-
-	REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), channel, 18, 16);
-}
-
 static void dispc_ovl_set_burst_size(enum omap_plane plane,
 		enum omap_burst_size burst_size)
 {
@@ -2805,74 +2769,6 @@ int dispc_ovl_setup(enum omap_plane plane, const struct omap_overlay_info *oi,
 }
 EXPORT_SYMBOL(dispc_ovl_setup);
 
-int dispc_wb_setup(const struct omap_dss_writeback_info *wi,
-		bool mem_to_mem, const struct omap_video_timings *mgr_timings)
-{
-	int r;
-	u32 l;
-	enum omap_plane plane = OMAP_DSS_WB;
-	const int pos_x = 0, pos_y = 0;
-	const u8 zorder = 0, global_alpha = 0;
-	const bool replication = false;
-	bool truncation;
-	int in_width = mgr_timings->x_res;
-	int in_height = mgr_timings->y_res;
-	enum omap_overlay_caps caps =
-		OMAP_DSS_OVL_CAP_SCALE | OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA;
-
-	DSSDBG("dispc_wb_setup, pa %x, pa_uv %x, %d,%d -> %dx%d, cmode %x, "
-		"rot %d, mir %d\n", wi->paddr, wi->p_uv_addr, in_width,
-		in_height, wi->width, wi->height, wi->color_mode, wi->rotation,
-		wi->mirror);
-
-	r = dispc_ovl_setup_common(plane, caps, wi->paddr, wi->p_uv_addr,
-		wi->buf_width, pos_x, pos_y, in_width, in_height, wi->width,
-		wi->height, wi->color_mode, wi->rotation, wi->mirror, zorder,
-		wi->pre_mult_alpha, global_alpha, wi->rotation_type,
-		replication, mgr_timings, mem_to_mem);
-
-	switch (wi->color_mode) {
-	case OMAP_DSS_COLOR_RGB16:
-	case OMAP_DSS_COLOR_RGB24P:
-	case OMAP_DSS_COLOR_ARGB16:
-	case OMAP_DSS_COLOR_RGBA16:
-	case OMAP_DSS_COLOR_RGB12U:
-	case OMAP_DSS_COLOR_ARGB16_1555:
-	case OMAP_DSS_COLOR_XRGB16_1555:
-	case OMAP_DSS_COLOR_RGBX16:
-		truncation = true;
-		break;
-	default:
-		truncation = false;
-		break;
-	}
-
-	/* setup extra DISPC_WB_ATTRIBUTES */
-	l = dispc_read_reg(DISPC_OVL_ATTRIBUTES(plane));
-	l = FLD_MOD(l, truncation, 10, 10);	/* TRUNCATIONENABLE */
-	l = FLD_MOD(l, mem_to_mem, 19, 19);	/* WRITEBACKMODE */
-	if (mem_to_mem)
-		l = FLD_MOD(l, 1, 26, 24);	/* CAPTUREMODE */
-	else
-		l = FLD_MOD(l, 0, 26, 24);	/* CAPTUREMODE */
-	dispc_write_reg(DISPC_OVL_ATTRIBUTES(plane), l);
-
-	if (mem_to_mem) {
-		/* WBDELAYCOUNT */
-		REG_FLD_MOD(DISPC_OVL_ATTRIBUTES2(plane), 0, 7, 0);
-	} else {
-		int wbdelay;
-
-		wbdelay = min(mgr_timings->vfp + mgr_timings->vsw +
-			mgr_timings->vbp, 255);
-
-		/* WBDELAYCOUNT */
-		REG_FLD_MOD(DISPC_OVL_ATTRIBUTES2(plane), wbdelay, 7, 0);
-	}
-
-	return r;
-}
-
 int dispc_ovl_enable(enum omap_plane plane, bool enable)
 {
 	DSSDBG("dispc_enable_plane %d, %d\n", plane, enable);
@@ -2903,16 +2799,6 @@ bool dispc_mgr_is_enabled(enum omap_channel channel)
 }
 EXPORT_SYMBOL(dispc_mgr_is_enabled);
 
-void dispc_wb_enable(bool enable)
-{
-	dispc_ovl_enable(OMAP_DSS_WB, enable);
-}
-
-bool dispc_wb_is_enabled(void)
-{
-	return dispc_ovl_enabled(OMAP_DSS_WB);
-}
-
 static void dispc_lcd_enable_signal_polarity(bool act_high)
 {
 	if (!dss_has_feature(FEAT_LCDENABLEPOL))

drivers/video/fbdev/omap2/omapfb/dss/dss.h

@@ -89,17 +89,6 @@ enum dss_dsi_content_type {
 	DSS_DSI_CONTENT_GENERIC,
 };
 
-enum dss_writeback_channel {
-	DSS_WB_LCD1_MGR =	0,
-	DSS_WB_LCD2_MGR =	1,
-	DSS_WB_TV_MGR =		2,
-	DSS_WB_OVL0 =		3,
-	DSS_WB_OVL1 =		4,
-	DSS_WB_OVL2 =		5,
-	DSS_WB_OVL3 =		6,
-	DSS_WB_LCD3_MGR =	7,
-};
-
 enum dss_pll_id {
 	DSS_PLL_DSI1,
 	DSS_PLL_DSI2,
@@ -403,15 +392,6 @@ int dispc_mgr_get_clock_div(enum omap_channel channel,
 		struct dispc_clock_info *cinfo);
 void dispc_set_tv_pclk(unsigned long pclk);
 
-u32 dispc_wb_get_framedone_irq(void);
-bool dispc_wb_go_busy(void);
-void dispc_wb_go(void);
-void dispc_wb_enable(bool enable);
-bool dispc_wb_is_enabled(void);
-void dispc_wb_set_channel_in(enum dss_writeback_channel channel);
-int dispc_wb_setup(const struct omap_dss_writeback_info *wi,
-		bool mem_to_mem, const struct omap_video_timings *timings);
-
 u32 dispc_read_irqstatus(void);
 void dispc_clear_irqstatus(u32 mask);
 u32 dispc_read_irqenable(void);