From: "Dr. David Alan Gilbert" <li...@treblig.org>

dispc_enable_fifomerge() last use was removed by 2012's
commit 85099f11bd03 ("Revert "OMAPDSS: APPLY: add fifo merge support
funcs"")

dispc_has_writeback(), dispc_wb_get_framedone_irq(), dispc_wb_go(),
dispc_wb_go_busy() and dispc_wb_setup() were changed from statics
to public symbols and unwired from a structure by 2020's
commit dac62bcafeaa ("drm/omap: remove dispc_ops")
but didn't have any users.

dispc_mgr_get_clock_div() got renamed from dispc_get_clock_div()
and it's last use was removed in 2011 by commit
42c9dee82129 ("OMAP: DSS2: Remove FB_OMAP_BOOTLOADER_INIT support")

Remove them.

Signed-off-by: Dr. David Alan Gilbert <li...@treblig.org>
---
 drivers/gpu/drm/omapdrm/dss/dispc.c | 146 ----------------------------
 drivers/gpu/drm/omapdrm/dss/dss.h   |  13 ---
 2 files changed, 159 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c 
b/drivers/gpu/drm/omapdrm/dss/dispc.c
index 993691b3cc7e..9344855c4887 100644
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -691,11 +691,6 @@ u32 dispc_mgr_get_sync_lost_irq(struct dispc_device *dispc,
        return mgr_desc[channel].sync_lost_irq;
 }
 
-u32 dispc_wb_get_framedone_irq(struct dispc_device *dispc)
-{
-       return DISPC_IRQ_FRAMEDONEWB;
-}
-
 void dispc_mgr_enable(struct dispc_device *dispc,
                             enum omap_channel channel, bool enable)
 {
@@ -726,30 +721,6 @@ void dispc_mgr_go(struct dispc_device *dispc, enum 
omap_channel channel)
        mgr_fld_write(dispc, channel, DISPC_MGR_FLD_GO, 1);
 }
 
-bool dispc_wb_go_busy(struct dispc_device *dispc)
-{
-       return REG_GET(dispc, DISPC_CONTROL2, 6, 6) == 1;
-}
-
-void dispc_wb_go(struct dispc_device *dispc)
-{
-       enum omap_plane_id plane = OMAP_DSS_WB;
-       bool enable, go;
-
-       enable = REG_GET(dispc, DISPC_OVL_ATTRIBUTES(plane), 0, 0) == 1;
-
-       if (!enable)
-               return;
-
-       go = REG_GET(dispc, DISPC_CONTROL2, 6, 6) == 1;
-       if (go) {
-               DSSERR("GO bit not down for WB\n");
-               return;
-       }
-
-       REG_FLD_MOD(dispc, DISPC_CONTROL2, 1, 6, 6);
-}
-
 static void dispc_ovl_write_firh_reg(struct dispc_device *dispc,
                                     enum omap_plane_id plane, int reg,
                                     u32 value)
@@ -1498,17 +1469,6 @@ void dispc_ovl_set_fifo_threshold(struct dispc_device 
*dispc,
                                min(high, 0xfffu));
 }
 
-void dispc_enable_fifomerge(struct dispc_device *dispc, bool enable)
-{
-       if (!dispc_has_feature(dispc, FEAT_FIFO_MERGE)) {
-               WARN_ON(enable);
-               return;
-       }
-
-       DSSDBG("FIFO merge %s\n", enable ? "enabled" : "disabled");
-       REG_FLD_MOD(dispc, DISPC_CONFIG, enable ? 1 : 0, 14, 14);
-}
-
 void dispc_ovl_compute_fifo_thresholds(struct dispc_device *dispc,
                                       enum omap_plane_id plane,
                                       u32 *fifo_low, u32 *fifo_high,
@@ -2814,95 +2774,6 @@ int dispc_ovl_setup(struct dispc_device *dispc,
        return r;
 }
 
-int dispc_wb_setup(struct dispc_device *dispc,
-                  const struct omap_dss_writeback_info *wi,
-                  bool mem_to_mem, const struct videomode *vm,
-                  enum dss_writeback_channel channel_in)
-{
-       int r;
-       u32 l;
-       enum omap_plane_id plane = OMAP_DSS_WB;
-       const int pos_x = 0, pos_y = 0;
-       const u8 zorder = 0, global_alpha = 0;
-       const bool replication = true;
-       bool truncation;
-       int in_width = vm->hactive;
-       int in_height = vm->vactive;
-       enum omap_overlay_caps caps =
-               OMAP_DSS_OVL_CAP_SCALE | OMAP_DSS_OVL_CAP_PRE_MULT_ALPHA;
-
-       if (vm->flags & DISPLAY_FLAGS_INTERLACED)
-               in_height /= 2;
-
-       DSSDBG("dispc_wb_setup, pa %x, pa_uv %x, %d,%d -> %dx%d, cmode %x, "
-               "rot %d\n", wi->paddr, wi->p_uv_addr, in_width,
-               in_height, wi->width, wi->height, wi->fourcc, wi->rotation);
-
-       r = dispc_ovl_setup_common(dispc, plane, caps, wi->paddr, wi->p_uv_addr,
-               wi->buf_width, pos_x, pos_y, in_width, in_height, wi->width,
-               wi->height, wi->fourcc, wi->rotation, zorder,
-               wi->pre_mult_alpha, global_alpha, wi->rotation_type,
-               replication, vm, mem_to_mem, DRM_COLOR_YCBCR_BT601,
-               DRM_COLOR_YCBCR_LIMITED_RANGE);
-       if (r)
-               return r;
-
-       switch (wi->fourcc) {
-       case DRM_FORMAT_RGB565:
-       case DRM_FORMAT_RGB888:
-       case DRM_FORMAT_ARGB4444:
-       case DRM_FORMAT_RGBA4444:
-       case DRM_FORMAT_RGBX4444:
-       case DRM_FORMAT_ARGB1555:
-       case DRM_FORMAT_XRGB1555:
-       case DRM_FORMAT_XRGB4444:
-               truncation = true;
-               break;
-       default:
-               truncation = false;
-               break;
-       }
-
-       /* setup extra DISPC_WB_ATTRIBUTES */
-       l = dispc_read_reg(dispc, DISPC_OVL_ATTRIBUTES(plane));
-       l = FLD_MOD(l, truncation, 10, 10);     /* TRUNCATIONENABLE */
-       l = FLD_MOD(l, channel_in, 18, 16);     /* CHANNELIN */
-       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, DISPC_OVL_ATTRIBUTES(plane), l);
-
-       if (mem_to_mem) {
-               /* WBDELAYCOUNT */
-               REG_FLD_MOD(dispc, DISPC_OVL_ATTRIBUTES2(plane), 0, 7, 0);
-       } else {
-               u32 wbdelay;
-
-               if (channel_in == DSS_WB_TV_MGR)
-                       wbdelay = vm->vsync_len + vm->vback_porch;
-               else
-                       wbdelay = vm->vfront_porch + vm->vsync_len +
-                               vm->vback_porch;
-
-               if (vm->flags & DISPLAY_FLAGS_INTERLACED)
-                       wbdelay /= 2;
-
-               wbdelay = min(wbdelay, 255u);
-
-               /* WBDELAYCOUNT */
-               REG_FLD_MOD(dispc, DISPC_OVL_ATTRIBUTES2(plane), wbdelay, 7, 0);
-       }
-
-       return 0;
-}
-
-bool dispc_has_writeback(struct dispc_device *dispc)
-{
-       return dispc->feat->has_writeback;
-}
-
 int dispc_ovl_enable(struct dispc_device *dispc,
                            enum omap_plane_id plane, bool enable)
 {
@@ -3742,23 +3613,6 @@ void dispc_mgr_set_clock_div(struct dispc_device *dispc,
                                  cinfo->pck_div);
 }
 
-int dispc_mgr_get_clock_div(struct dispc_device *dispc,
-                           enum omap_channel channel,
-                           struct dispc_clock_info *cinfo)
-{
-       unsigned long fck;
-
-       fck = dispc_fclk_rate(dispc);
-
-       cinfo->lck_div = REG_GET(dispc, DISPC_DIVISORo(channel), 23, 16);
-       cinfo->pck_div = REG_GET(dispc, DISPC_DIVISORo(channel), 7, 0);
-
-       cinfo->lck = fck / cinfo->lck_div;
-       cinfo->pck = cinfo->lck / cinfo->pck_div;
-
-       return 0;
-}
-
 u32 dispc_read_irqstatus(struct dispc_device *dispc)
 {
        return dispc_read_reg(dispc, DISPC_IRQSTATUS);
diff --git a/drivers/gpu/drm/omapdrm/dss/dss.h 
b/drivers/gpu/drm/omapdrm/dss/dss.h
index 4ff02fbc0e71..a8b231ed4f4b 100644
--- a/drivers/gpu/drm/omapdrm/dss/dss.h
+++ b/drivers/gpu/drm/omapdrm/dss/dss.h
@@ -416,7 +416,6 @@ u32 dispc_mgr_get_framedone_irq(struct dispc_device *dispc,
                                       enum omap_channel channel);
 u32 dispc_mgr_get_sync_lost_irq(struct dispc_device *dispc,
                                       enum omap_channel channel);
-u32 dispc_wb_get_framedone_irq(struct dispc_device *dispc);
 
 u32 dispc_get_memory_bandwidth_limit(struct dispc_device *dispc);
 
@@ -458,20 +457,11 @@ int dispc_ovl_setup(struct dispc_device *dispc,
 int dispc_ovl_enable(struct dispc_device *dispc,
                            enum omap_plane_id plane, bool enable);
 
-bool dispc_has_writeback(struct dispc_device *dispc);
-int dispc_wb_setup(struct dispc_device *dispc,
-                  const struct omap_dss_writeback_info *wi,
-                  bool mem_to_mem, const struct videomode *vm,
-                  enum dss_writeback_channel channel_in);
-bool dispc_wb_go_busy(struct dispc_device *dispc);
-void dispc_wb_go(struct dispc_device *dispc);
-
 void dispc_enable_sidle(struct dispc_device *dispc);
 void dispc_disable_sidle(struct dispc_device *dispc);
 
 void dispc_lcd_enable_signal(struct dispc_device *dispc, bool enable);
 void dispc_pck_free_enable(struct dispc_device *dispc, bool enable);
-void dispc_enable_fifomerge(struct dispc_device *dispc, bool enable);
 
 typedef bool (*dispc_div_calc_func)(int lckd, int pckd, unsigned long lck,
                unsigned long pck, void *data);
@@ -494,9 +484,6 @@ void dispc_ovl_compute_fifo_thresholds(struct dispc_device 
*dispc,
 void dispc_mgr_set_clock_div(struct dispc_device *dispc,
                             enum omap_channel channel,
                             const struct dispc_clock_info *cinfo);
-int dispc_mgr_get_clock_div(struct dispc_device *dispc,
-                           enum omap_channel channel,
-                           struct dispc_clock_info *cinfo);
 void dispc_set_tv_pclk(struct dispc_device *dispc, unsigned long pclk);
 
 #ifdef CONFIG_OMAP2_DSS_COLLECT_IRQ_STATS
-- 
2.47.0

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