drm: omapdrm: dispc: Select features based on compatible string

Use the compatible string instead of the OMAP SoC revision to determine
device features. On OMAP34xx the features depend on the ES revision that
can not be determined from the compatible string. Use soc_device_match()
in that case.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/dss/dispc.c

@@ -39,7 +39,9 @@
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/component.h>
+#include <linux/sys_soc.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_blend.h>
 
@@ -3804,54 +3806,6 @@ static const struct dispc_features omap54xx_dispc_feats = {
 	.has_gamma_i734_bug	=	true,
 };
 
-static int dispc_init_features(struct platform_device *pdev)
-{
-	const struct dispc_features *src;
-	struct dispc_features *dst;
-
-	dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
-	if (!dst) {
-		dev_err(&pdev->dev, "Failed to allocate DISPC Features\n");
-		return -ENOMEM;
-	}
-
-	switch (omapdss_get_version()) {
-	case OMAPDSS_VER_OMAP24xx:
-		src = &omap24xx_dispc_feats;
-		break;
-
-	case OMAPDSS_VER_OMAP34xx_ES1:
-		src = &omap34xx_rev1_0_dispc_feats;
-		break;
-
-	case OMAPDSS_VER_OMAP34xx_ES3:
-	case OMAPDSS_VER_OMAP3630:
-	case OMAPDSS_VER_AM35xx:
-	case OMAPDSS_VER_AM43xx:
-		src = &omap34xx_rev3_0_dispc_feats;
-		break;
-
-	case OMAPDSS_VER_OMAP4430_ES1:
-	case OMAPDSS_VER_OMAP4430_ES2:
-	case OMAPDSS_VER_OMAP4:
-		src = &omap44xx_dispc_feats;
-		break;
-
-	case OMAPDSS_VER_OMAP5:
-	case OMAPDSS_VER_DRA7xx:
-		src = &omap54xx_dispc_feats;
-		break;
-
-	default:
-		return -ENODEV;
-	}
-
-	memcpy(dst, src, sizeof(*dst));
-	dispc.feat = dst;
-
-	return 0;
-}
-
 static irqreturn_t dispc_irq_handler(int irq, void *arg)
 {
 	if (!dispc.is_enabled)
@@ -4083,9 +4037,25 @@ static const struct dispc_ops dispc_ops = {
 };
 
 /* DISPC HW IP initialisation */
+static const struct of_device_id dispc_of_match[] = {
+	{ .compatible = "ti,omap2-dispc", .data = &omap24xx_dispc_feats },
+	{ .compatible = "ti,omap3-dispc", .data = &omap34xx_rev3_0_dispc_feats },
+	{ .compatible = "ti,omap4-dispc", .data = &omap44xx_dispc_feats },
+	{ .compatible = "ti,omap5-dispc", .data = &omap54xx_dispc_feats },
+	{ .compatible = "ti,dra7-dispc",  .data = &omap54xx_dispc_feats },
+	{},
+};
+
+static const struct soc_device_attribute dispc_soc_devices[] = {
+	{ .machine = "OMAP3[45]*",
+	  .revision = "ES[12].?",	.data = &omap34xx_rev1_0_dispc_feats },
+	{ /* sentinel */ }
+};
+
 static int dispc_bind(struct device *dev, struct device *master, void *data)
 {
 	struct platform_device *pdev = to_platform_device(dev);
+	const struct soc_device_attribute *soc;
 	u32 rev;
 	int r = 0;
 	struct resource *dispc_mem;
@@ -4095,9 +4065,15 @@ static int dispc_bind(struct device *dev, struct device *master, void *data)
 
 	spin_lock_init(&dispc.control_lock);
 
-	r = dispc_init_features(dispc.pdev);
-	if (r)
-		return r;
+	/*
+	 * The OMAP34xx ES1.x and ES2.x can't be identified through the
+	 * compatible string, use SoC device matching.
+	 */
+	soc = soc_device_match(dispc_soc_devices);
+	if (soc)
+		dispc.feat = soc->data;
+	else
+		dispc.feat = of_match_device(dispc_of_match, &pdev->dev)->data;
 
 	r = dispc_errata_i734_wa_init();
 	if (r)
@@ -4226,15 +4202,6 @@ static const struct dev_pm_ops dispc_pm_ops = {
 	.runtime_resume = dispc_runtime_resume,
 };
 
-static const struct of_device_id dispc_of_match[] = {
-	{ .compatible = "ti,omap2-dispc", },
-	{ .compatible = "ti,omap3-dispc", },
-	{ .compatible = "ti,omap4-dispc", },
-	{ .compatible = "ti,omap5-dispc", },
-	{ .compatible = "ti,dra7-dispc", },
-	{},
-};
-
 static struct platform_driver omap_dispchw_driver = {
 	.probe		= dispc_probe,
 	.remove         = dispc_remove,