video: rockchip: rk32_dp: add support for rk3368

Signed-off-by: yxj <yxj@rock-chips.com>

drivers/video/rockchip/transmitter/rk32_dp.c

@@ -12,20 +12,20 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/interrupt.h>
 #include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/platform_device.h>
-#include <linux/uaccess.h>
+#include <linux/rockchip/cpu.h>
 #include <linux/rockchip/iomap.h>
 #include <linux/rockchip/grf.h>
-#include "rk32_dp.h"
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
 
 #if defined(CONFIG_OF)
 #include <linux/of.h>
@@ -37,16 +37,27 @@
 #include <linux/seq_file.h>
 #endif
 
+#include "rk32_dp.h"
+
 /*#define EDP_BIST_MODE*/
 /*#define SW_LT*/
+
+#define RK3368_GRF_SOC_CON4	0x410
+
 static struct rk32_edp *rk32_edp;
 
 static int rk32_edp_clk_enable(struct rk32_edp *edp)
 {
+	int ret;
+
 	if (!edp->clk_on) {
-		clk_prepare_enable(edp->pd);
+		if (edp->pd)
+			clk_prepare_enable(edp->pd);
 		clk_prepare_enable(edp->pclk);
 		clk_prepare_enable(edp->clk_edp);
+		ret = clk_set_rate(edp->clk_24m, 24000000);
+		if (ret < 0)
+			dev_err(edp->dev, "cannot set edp clk_24m %d\n", ret);
 		clk_prepare_enable(edp->clk_24m);
 		edp->clk_on = true;
 	}
@@ -60,30 +71,39 @@ static int rk32_edp_clk_disable(struct rk32_edp *edp)
 		clk_disable_unprepare(edp->pclk);
 		clk_disable_unprepare(edp->clk_edp);
 		clk_disable_unprepare(edp->clk_24m);
-		clk_disable_unprepare(edp->pd);
+		if (edp->pd)
+			clk_disable_unprepare(edp->pd);
 		edp->clk_on = false;
 	}
 
 	return 0;
 }
 
-static int rk32_edp_pre_init(void)
+static int rk32_edp_pre_init(struct rk32_edp *edp)
 {
 	u32 val;
-	val = GRF_EDP_REF_CLK_SEL_INTER | (GRF_EDP_REF_CLK_SEL_INTER << 16);
-	writel_relaxed(val, RK_GRF_VIRT + RK3288_GRF_SOC_CON12);
 
-	val = 0x80008000;
-	writel_relaxed(val, RK_CRU_VIRT + 0x0d0); /*select 24m*/
-	dsb(sy);
-	val = 0x80008000;
-	writel_relaxed(val, RK_CRU_VIRT + 0x01d0); /*reset edp*/
-	dsb(sy);
-	udelay(1);
-	val = 0x80000000;
-	writel_relaxed(val, RK_CRU_VIRT + 0x01d0);
-	dsb(sy);
-	udelay(1);
+	if (cpu_is_rk3288()) {
+		val = GRF_EDP_REF_CLK_SEL_INTER |
+			(GRF_EDP_REF_CLK_SEL_INTER << 16);
+		writel_relaxed(val, RK_GRF_VIRT + RK3288_GRF_SOC_CON12);
+
+		val = 0x80008000;
+		writel_relaxed(val, RK_CRU_VIRT + 0x01d0); /*reset edp*/
+		dsb(sy);
+		udelay(1);
+		val = 0x80000000;
+		writel_relaxed(val, RK_CRU_VIRT + 0x01d0);
+		dsb(sy);
+		udelay(1);
+	} else {
+		val = 0x01 | (0x01 << 16);
+		regmap_write(edp->grf, RK3368_GRF_SOC_CON4, val);
+
+		reset_control_assert(edp->rst_24m);
+		usleep_range(10, 20);
+		reset_control_deassert(edp->rst_24m);
+	}
 	return 0;
 }
 
@@ -93,11 +113,14 @@ static int rk32_edp_init_edp(struct rk32_edp *edp)
 	u32 val = 0;
 
 	rk_fb_get_prmry_screen(screen);
-	if (screen->lcdc_id == 1)  /*select lcdc*/
-		val = EDP_SEL_VOP_LIT | (EDP_SEL_VOP_LIT << 16);
-	else
-		val = EDP_SEL_VOP_LIT << 16;
-	writel_relaxed(val, RK_GRF_VIRT + RK3288_GRF_SOC_CON6);
+
+	if (cpu_is_rk3288()) {
+		if (screen->lcdc_id == 1)  /*select lcdc*/
+			val = EDP_SEL_VOP_LIT | (EDP_SEL_VOP_LIT << 16);
+		else
+			val = EDP_SEL_VOP_LIT << 16;
+		writel_relaxed(val, RK_GRF_VIRT + RK3288_GRF_SOC_CON6);
+	}
 
 	rk32_edp_reset(edp);
 	rk32_edp_init_refclk(edp);
@@ -1153,7 +1176,7 @@ static int rk32_edp_enable(void)
 
 
 	rk32_edp_clk_enable(edp);
-	rk32_edp_pre_init();
+	rk32_edp_pre_init(edp);
 	rk32_edp_init_edp(edp);
 	enable_irq(edp->irq);
 	/*ret = rk32_edp_handle_edid(edp);
@@ -1352,9 +1375,18 @@ static int rk32_edp_probe(struct platform_device *pdev)
 		return PTR_ERR(edp->regs);
 	}
 
+	edp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
+	if (IS_ERR(edp->grf)) {
+		dev_err(&pdev->dev, "can't find rockchip,grf property\n");
+		return PTR_ERR(edp->grf);
+	}
+
 	edp->pd = devm_clk_get(&pdev->dev, "pd_edp");
-	if (IS_ERR(edp->pd))
+	if (IS_ERR(edp->pd)) {
 		dev_err(&pdev->dev, "cannot get pd\n");
+		edp->pd = NULL;
+	}
+
 	edp->clk_edp = devm_clk_get(&pdev->dev, "clk_edp");
 	if (IS_ERR(edp->clk_edp)) {
 		dev_err(&pdev->dev, "cannot get clk_edp\n");
@@ -1372,9 +1404,17 @@ static int rk32_edp_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "cannot get pclk\n");
 		return PTR_ERR(edp->pclk);
 	}
+
+	/*edp 24m need sorft reset*/
+	edp->rst_24m = devm_reset_control_get(&pdev->dev, "edp_24m");
+	if (IS_ERR(edp->rst_24m)) {
+		dev_err(&pdev->dev, "failed to get reset\n");
+		return PTR_ERR(edp->rst_24m);
+	}
+
 	rk32_edp_clk_enable(edp);
 	if (!support_uboot_display())
-		rk32_edp_pre_init();
+		rk32_edp_pre_init(edp);
 	edp->irq = platform_get_irq(pdev, 0);
 	if (edp->irq < 0) {
 		dev_err(&pdev->dev, "cannot find IRQ\n");

drivers/video/rockchip/transmitter/rk32_dp.h

@@ -1,6 +1,11 @@
 #ifndef __RK32_DP_H
 #define __RK32_DP_H
+
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
 #include <linux/rk_fb.h>
+
 #include "dpcd_edid.h"
 
 #define DP_VERSION				0x10
@@ -513,11 +518,14 @@ struct link_train {
 struct rk32_edp {
 	struct device 		*dev;
 	void __iomem  		*regs;
+	struct regmap		*grf;
 	unsigned int  		irq;
 	struct clk		*pd;
 	struct clk    		*clk_edp;  /*clk for edp controller*/
 	struct clk    		*clk_24m;  /*clk for edp phy*/
 	struct clk		*pclk;	   /*clk for phb bus*/
+	struct reset_control    *rst_24m;
+	struct reset_control    *rst_apb;
 	struct link_train	link_train;
 	struct video_info	video_info;
 	struct rk_screen	screen;