[PATCH 13/14] drm/msm: Add hdcp register ranges to sc7180 device tree

[Sean Paul]

From: Sean Paul <seanpaul at chromium.org>

This patch adds the register ranges required for HDCP to the sc7180
device tree. These registers will be used to inject HDCP key as well as
toggle HDCP on and off.

Signed-off-by: Sean Paul <seanpaul at chromium.org>
---
 drivers/gpu/drm/msm/dp/dp_parser.c | 30 +++++++++++++++++++++++++++---
 drivers/gpu/drm/msm/dp/dp_parser.h |  4 ++++
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index 0519dd3ac3c3..4bbe2485ce3c 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -20,11 +20,19 @@ static const struct dp_regulator_cfg sdm845_dp_reg_cfg = {
 };
 
 static int msm_dss_ioremap(struct platform_device *pdev,
-				struct dss_io_data *io_data)
+				struct dss_io_data *io_data, const char *name,
+				int fallback_idx)
 {
 	struct resource *res = NULL;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
+
+	/* Support dts which do not have named resources */
+	if (!res) {
+		if (fallback_idx >= 0)
+			res = platform_get_resource(pdev, IORESOURCE_MEM,
+						    fallback_idx);
+	}
 	if (!res) {
 		DRM_ERROR("%pS->%s: msm_dss_get_res failed\n",
 			__builtin_return_address(0), __func__);
@@ -55,6 +63,8 @@ static void dp_parser_unmap_io_resources(struct dp_parser *parser)
 {
 	struct dp_io *io = &parser->io;
 
+	msm_dss_iounmap(&io->hdcp_tz);
+	msm_dss_iounmap(&io->hdcp_key);
 	msm_dss_iounmap(&io->dp_controller);
 }
 
@@ -64,12 +74,26 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
 	struct platform_device *pdev = parser->pdev;
 	struct dp_io *io = &parser->io;
 
-	rc = msm_dss_ioremap(pdev, &io->dp_controller);
+	rc = msm_dss_ioremap(pdev, &io->dp_controller, "dp_controller", 0);
 	if (rc) {
 		DRM_ERROR("unable to remap dp io resources, rc=%d\n", rc);
 		goto err;
 	}
 
+	rc = msm_dss_ioremap(pdev, &io->hdcp_key, "hdcp_key", -1);
+	if (rc) {
+		DRM_INFO("unable to remap dp hdcp resources, rc=%d\n", rc);
+		io->hdcp_key.base = NULL;
+		io->hdcp_key.len = 0;
+	}
+
+	rc = msm_dss_ioremap(pdev, &io->hdcp_tz, "hdcp_tz", -1);
+	if (rc) {
+		DRM_INFO("unable to remap dp hdcp resources, rc=%d\n", rc);
+		io->hdcp_tz.base = NULL;
+		io->hdcp_tz.len = 0;
+	}
+
 	io->phy = devm_phy_get(&pdev->dev, "dp");
 	if (IS_ERR(io->phy)) {
 		rc = PTR_ERR(io->phy);
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 34b49628bbaf..09d876620175 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -62,10 +62,14 @@ struct dp_display_data {
  * struct dp_ctrl_resource - controller's IO related data
  *
  * @dp_controller: Display Port controller mapped memory address
+ * @hdcp_key: mapped memory for HDCP key ingestion
+ * @hdcp_tz: mapped memory for HDCP TZ interaction
  * @phy_io: phy's mapped memory address
  */
 struct dp_io {
 	struct dss_io_data dp_controller;
+	struct dss_io_data hdcp_key;
+	struct dss_io_data hdcp_tz;
 	struct phy *phy;
 	union phy_configure_opts phy_opts;
 };
-- 
Sean Paul, Software Engineer, Google / Chromium OS