media: platform: qcom/iris: introduce optional controller_rst_tbl

Introduce an optional controller_rst_tbl use to store reset lines
used to reset part of the controller.

This is necessary for the vpu3 support, when the xo reset line
must be asserted separately from the other reset line
on power off operation.

Factor the iris_init_resets() logic to allow requesting
multiple reset tables.

Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # x1e Dell
Reviewed-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>

3 files changed, 31 insertions, 12 deletions

diff --git a/drivers/media/platform/qcom/iris/iris_core.h b/drivers/media/platform/qcom/iris/iris_core.h
index 37fb4919fecc..aeeac32a1f6d 100644
--- a/drivers/media/platform/qcom/iris/iris_core.h
+++ b/drivers/media/platform/qcom/iris/iris_core.h
@@ -43,6 +43,7 @@ struct icc_info {
  * @clock_tbl: table of iris clocks
  * @clk_count: count of iris clocks
  * @resets: table of iris reset clocks
+ * @controller_resets: table of controller reset clocks
  * @iris_platform_data: a structure for platform data
  * @state: current state of core
  * @iface_q_table_daddr: device address for interface queue table memory
@@ -82,6 +83,7 @@ struct iris_core {
 	struct clk_bulk_data			*clock_tbl;
 	u32					clk_count;
 	struct reset_control_bulk_data		*resets;
+	struct reset_control_bulk_data		*controller_resets;
 	const struct iris_platform_data		*iris_platform_data;
 	enum iris_core_state			state;
 	dma_addr_t				iface_q_table_daddr;
diff --git a/drivers/media/platform/qcom/iris/iris_platform_common.h b/drivers/media/platform/qcom/iris/iris_platform_common.h
index f6b15d2805fb..fdd40fd80178 100644
--- a/drivers/media/platform/qcom/iris/iris_platform_common.h
+++ b/drivers/media/platform/qcom/iris/iris_platform_common.h
@@ -156,6 +156,8 @@ struct iris_platform_data {
 	unsigned int clk_tbl_size;
 	const char * const *clk_rst_tbl;
 	unsigned int clk_rst_tbl_size;
+	const char * const *controller_rst_tbl;
+	unsigned int controller_rst_tbl_size;
 	u64 dma_mask;
 	const char *fwname;
 	u32 pas_id;
diff --git a/drivers/media/platform/qcom/iris/iris_probe.c b/drivers/media/platform/qcom/iris/iris_probe.c
index aca442dcc153..4f8bce6e2002 100644
--- a/drivers/media/platform/qcom/iris/iris_probe.c
+++ b/drivers/media/platform/qcom/iris/iris_probe.c
@@ -91,25 +91,40 @@ static int iris_init_clocks(struct iris_core *core)
 	return 0;
 }
 
-static int iris_init_resets(struct iris_core *core)
+static int iris_init_reset_table(struct iris_core *core,
+				 struct reset_control_bulk_data **resets,
+				 const char * const *rst_tbl, u32 rst_tbl_size)
 {
-	const char * const *rst_tbl;
-	u32 rst_tbl_size;
 	u32 i = 0;
 
-	rst_tbl = core->iris_platform_data->clk_rst_tbl;
-	rst_tbl_size = core->iris_platform_data->clk_rst_tbl_size;
-
-	core->resets = devm_kzalloc(core->dev,
-				    sizeof(*core->resets) * rst_tbl_size,
-				    GFP_KERNEL);
-	if (!core->resets)
+	*resets = devm_kzalloc(core->dev,
+			       sizeof(struct reset_control_bulk_data) * rst_tbl_size,
+			       GFP_KERNEL);
+	if (!*resets)
 		return -ENOMEM;
 
 	for (i = 0; i < rst_tbl_size; i++)
-		core->resets[i].id = rst_tbl[i];
+		(*resets)[i].id = rst_tbl[i];
+
+	return devm_reset_control_bulk_get_exclusive(core->dev, rst_tbl_size, *resets);
+}
+
+static int iris_init_resets(struct iris_core *core)
+{
+	int ret;
+
+	ret = iris_init_reset_table(core, &core->resets,
+				    core->iris_platform_data->clk_rst_tbl,
+				    core->iris_platform_data->clk_rst_tbl_size);
+	if (ret)
+		return ret;
+
+	if (!core->iris_platform_data->controller_rst_tbl_size)
+		return 0;
 
-	return devm_reset_control_bulk_get_exclusive(core->dev, rst_tbl_size, core->resets);
+	return iris_init_reset_table(core, &core->controller_resets,
+				     core->iris_platform_data->controller_rst_tbl,
+				     core->iris_platform_data->controller_rst_tbl_size);
 }
 
 static int iris_init_resources(struct iris_core *core)