OMAP: DSS2: Clean up probe for DSS & DSI

Both dss.c and dsi.c had a probe function, which was almost a dummy one,
calling dss_init() and dsi_init().

Remove the init functions by moving the initialization code into probe
functions.

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

1 files changed, 64 insertions, 81 deletions

diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
index bcd4a07adcc..57ce428deb0 100644
--- a/drivers/video/omap2/dss/dss.c
+++ b/drivers/video/omap2/dss/dss.c
@@ -664,79 +664,6 @@ void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select hdmi)
         REG_FLD_MOD(DSS_CONTROL, hdmi, 15, 15); /* VENC_HDMI_SWITCH */
 }
 
-static int dss_init(void)
-{
-        int r;
-        u32 rev;
-        struct resource *dss_mem;
-
-        dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
-        if (!dss_mem) {
-                DSSERR("can't get IORESOURCE_MEM DSS\n");
-                r = -EINVAL;
-                goto fail0;
-        }
-        dss.base = ioremap(dss_mem->start, resource_size(dss_mem));
-        if (!dss.base) {
-                DSSERR("can't ioremap DSS\n");
-                r = -ENOMEM;
-                goto fail0;
-        }
-
-        /* disable LCD and DIGIT output. This seems to fix the synclost
-         * problem that we get, if the bootloader starts the DSS and
-         * the kernel resets it */
-        omap_writel(omap_readl(0x48050440) & ~0x3, 0x48050440);
-
-#ifdef CONFIG_OMAP2_DSS_SLEEP_BEFORE_RESET
-        /* We need to wait here a bit, otherwise we sometimes start to
-         * get synclost errors, and after that only power cycle will
-         * restore DSS functionality. I have no idea why this happens.
-         * And we have to wait _before_ resetting the DSS, but after
-         * enabling clocks.
-         *
-         * This bug was at least present on OMAP3430. It's unknown
-         * if it happens on OMAP2 or OMAP3630.
-         */
-        msleep(50);
-#endif
-
-        _omap_dss_reset();
-
-        /* autoidle */
-        REG_FLD_MOD(DSS_SYSCONFIG, 1, 0, 0);
-
-        /* Select DPLL */
-        REG_FLD_MOD(DSS_CONTROL, 0, 0, 0);
-
-#ifdef CONFIG_OMAP2_DSS_VENC
-        REG_FLD_MOD(DSS_CONTROL, 1, 4, 4);      /* venc dac demen */
-        REG_FLD_MOD(DSS_CONTROL, 1, 3, 3);      /* venc clock 4x enable */
-        REG_FLD_MOD(DSS_CONTROL, 0, 2, 2);      /* venc clock mode = normal */
-#endif
-        dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
-        dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
-        dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK;
-        dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
-        dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
-
-        dss_save_context();
-
-        rev = dss_read_reg(DSS_REVISION);
-        printk(KERN_INFO "OMAP DSS rev %d.%d\n",
-                        FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
-
-        return 0;
-
-fail0:
-        return r;
-}
-
-static void dss_exit(void)
-{
-        iounmap(dss.base);
-}
-
 /* CONTEXT */
 static int dss_get_ctx_id(void)
 {
@@ -1094,10 +1021,25 @@ void dss_debug_dump_clocks(struct seq_file *s)
 /* DSS HW IP initialisation */
 static int omap_dsshw_probe(struct platform_device *pdev)
 {
+        struct resource *dss_mem;
+        u32 rev;
         int r;
 
         dss.pdev = pdev;
 
+        dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
+        if (!dss_mem) {
+                DSSERR("can't get IORESOURCE_MEM DSS\n");
+                r = -EINVAL;
+                goto err_ioremap;
+        }
+        dss.base = ioremap(dss_mem->start, resource_size(dss_mem));
+        if (!dss.base) {
+                DSSERR("can't ioremap DSS\n");
+                r = -ENOMEM;
+                goto err_ioremap;
+        }
+
         r = dss_get_clocks();
         if (r)
                 goto err_clocks;
@@ -1107,11 +1049,42 @@ static int omap_dsshw_probe(struct platform_device *pdev)
         dss.ctx_id = dss_get_ctx_id();
         DSSDBG("initial ctx id %u\n", dss.ctx_id);
 
-        r = dss_init();
-        if (r) {
-                DSSERR("Failed to initialize DSS\n");
-                goto err_dss;
-        }
+        /* disable LCD and DIGIT output. This seems to fix the synclost
+         * problem that we get, if the bootloader starts the DSS and
+         * the kernel resets it */
+        omap_writel(omap_readl(0x48050440) & ~0x3, 0x48050440);
+
+#ifdef CONFIG_OMAP2_DSS_SLEEP_BEFORE_RESET
+        /* We need to wait here a bit, otherwise we sometimes start to
+         * get synclost errors, and after that only power cycle will
+         * restore DSS functionality. I have no idea why this happens.
+         * And we have to wait _before_ resetting the DSS, but after
+         * enabling clocks.
+         *
+         * This bug was at least present on OMAP3430. It's unknown
+         * if it happens on OMAP2 or OMAP3630.
+         */
+        msleep(50);
+#endif
+
+        _omap_dss_reset();
+
+        /* autoidle */
+        REG_FLD_MOD(DSS_SYSCONFIG, 1, 0, 0);
+
+        /* Select DPLL */
+        REG_FLD_MOD(DSS_CONTROL, 0, 0, 0);
+
+#ifdef CONFIG_OMAP2_DSS_VENC
+        REG_FLD_MOD(DSS_CONTROL, 1, 4, 4);      /* venc dac demen */
+        REG_FLD_MOD(DSS_CONTROL, 1, 3, 3);      /* venc clock 4x enable */
+        REG_FLD_MOD(DSS_CONTROL, 0, 2, 2);      /* venc clock mode = normal */
+#endif
+        dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
+        dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
+        dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK;
+        dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
+        dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
 
         r = dpi_init();
         if (r) {
@@ -1125,23 +1098,32 @@ static int omap_dsshw_probe(struct platform_device *pdev)
                 goto err_sdi;
         }
 
+        dss_save_context();
+
+        rev = dss_read_reg(DSS_REVISION);
+        printk(KERN_INFO "OMAP DSS rev %d.%d\n",
+                        FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
+
         dss_clk_disable_all_no_ctx();
+
         return 0;
 err_sdi:
         dpi_exit();
 err_dpi:
-        dss_exit();
-err_dss:
         dss_clk_disable_all_no_ctx();
         dss_put_clocks();
 err_clocks:
+        iounmap(dss.base);
+err_ioremap:
         return r;
 }
 
 static int omap_dsshw_remove(struct platform_device *pdev)
 {
+        dpi_exit();
+        sdi_exit();
 
-        dss_exit();
+        iounmap(dss.base);
 
         /*
          * As part of hwmod changes, DSS is not the only controller of dss
@@ -1152,6 +1134,7 @@ static int omap_dsshw_remove(struct platform_device *pdev)
         WARN_ON(dss.num_clks_enabled > 0);
 
         dss_put_clocks();
+
         return 0;
 }