[PATCH 00/14] drm/msm/dp: clear power and parser submodules away

[PATCH 00/14] drm/msm/dp: clear power and parser submodules away

[Dmitry Baryshkov]

Reshuffle code in the DP driver, cleaning up clocks and DT parsing and
dropping the dp_power and dp_parser submodules.

Initially I started by looking onto stream_pixel clock handling only to
find several wrapping layers around a single clocks. After inlining
and/or dropping them (and thus dp_power submodule), it was more or less
natural to continue cleaning up the dp_parser until it got removed
completely.

Dmitry Baryshkov (14):
  drm/msm/dp: drop unused parser definitions
  drm/msm/dp: drop unused fields from dp_power_private
  drm/msm/dp: parse DT from dp_parser_get
  drm/msm/dp: inline dp_power_(de)init
  drm/msm/dp: fold dp_power into dp_ctrl module
  drm/msm/dp: simplify stream clocks handling
  drm/msm/dp: stop parsing clock names from DT
  drm/msm/dp: move phy_configure_opts to dp_ctrl
  drm/msm/dp: remove PHY handling from dp_catalog.c
  drm/msm/dp: handle PHY directly in dp_ctrl
  drm/msm/dp: move all IO handling to dp_catalog
  drm/msm/dp: move link property handling to dp_panel
  drm/msm/dp: move next_bridge handling to dp_display
  drm/msm/dp: drop dp_parser

 drivers/gpu/drm/msm/Makefile        |   2 -
 drivers/gpu/drm/msm/dp/dp_aux.c     |   9 +-
 drivers/gpu/drm/msm/dp/dp_aux.h     |   2 +
 drivers/gpu/drm/msm/dp/dp_catalog.c | 156 ++++++++-----
 drivers/gpu/drm/msm/dp/dp_catalog.h |   6 +-
 drivers/gpu/drm/msm/dp/dp_ctrl.c    | 317 +++++++++++++++++++--------
 drivers/gpu/drm/msm/dp/dp_ctrl.h    |  28 ++-
 drivers/gpu/drm/msm/dp/dp_debug.c   |   1 -
 drivers/gpu/drm/msm/dp/dp_display.c | 101 +++------
 drivers/gpu/drm/msm/dp/dp_display.h |   3 +-
 drivers/gpu/drm/msm/dp/dp_panel.c   |  63 ++++++
 drivers/gpu/drm/msm/dp/dp_parser.c  | 327 ----------------------------
 drivers/gpu/drm/msm/dp/dp_parser.h  | 155 -------------
 drivers/gpu/drm/msm/dp/dp_power.c   | 183 ----------------
 drivers/gpu/drm/msm/dp/dp_power.h   |  95 --------
 15 files changed, 463 insertions(+), 985 deletions(-)
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_parser.c
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_parser.h
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_power.c
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_power.h

-- 
2.39.2

[PATCH 01/14] drm/msm/dp: drop unused parser definitions

[Dmitry Baryshkov]

Drop several unused and obsolete definitions from the dp_parser module.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_parser.h | 46 ------------------------------
 1 file changed, 46 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 1f068626d445..90a2cdbbe344 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -12,7 +12,6 @@
 
 #include "msm_drv.h"
 
-#define DP_LABEL "MDSS DP DISPLAY"
 #define DP_MAX_PIXEL_CLK_KHZ	675000
 #define DP_MAX_NUM_DP_LANES	4
 #define DP_LINK_RATE_HBR2	540000 /* kbytes */
@@ -21,7 +20,6 @@ enum dp_pm_type {
 	DP_CORE_PM,
 	DP_CTRL_PM,
 	DP_STREAM_PM,
-	DP_PHY_PM,
 	DP_MAX_PM
 };
 
@@ -43,28 +41,10 @@ static inline const char *dp_parser_pm_name(enum dp_pm_type module)
 	case DP_CORE_PM:	return "DP_CORE_PM";
 	case DP_CTRL_PM:	return "DP_CTRL_PM";
 	case DP_STREAM_PM:	return "DP_STREAM_PM";
-	case DP_PHY_PM:		return "DP_PHY_PM";
 	default:		return "???";
 	}
 }
 
-/**
- * struct dp_display_data  - display related device tree data.
- *
- * @ctrl_node: referece to controller device
- * @phy_node:  reference to phy device
- * @is_active: is the controller currently active
- * @name: name of the display
- * @display_type: type of the display
- */
-struct dp_display_data {
-	struct device_node *ctrl_node;
-	struct device_node *phy_node;
-	bool is_active;
-	const char *name;
-	const char *display_type;
-};
-
 /**
  * struct dp_ctrl_resource - controller's IO related data
  *
@@ -77,28 +57,6 @@ struct dp_io {
 	union phy_configure_opts phy_opts;
 };
 
-/**
- * struct dp_pinctrl - DP's pin control
- *
- * @pin: pin-controller's instance
- * @state_active: active state pin control
- * @state_hpd_active: hpd active state pin control
- * @state_suspend: suspend state pin control
- */
-struct dp_pinctrl {
-	struct pinctrl *pin;
-	struct pinctrl_state *state_active;
-	struct pinctrl_state *state_hpd_active;
-	struct pinctrl_state *state_suspend;
-};
-
-/* Regulators for DP devices */
-struct dp_reg_entry {
-	char name[32];
-	int enable_load;
-	int disable_load;
-};
-
 struct dss_module_power {
 	unsigned int num_clk;
 	struct clk_bulk_data *clocks;
@@ -109,16 +67,12 @@ struct dss_module_power {
  *
  * @pdev: platform data of the client
  * @mp: gpio, regulator and clock related data
- * @pinctrl: pin-control related data
- * @disp_data: controller's display related data
  * @parse: function to be called by client to parse device tree.
  */
 struct dp_parser {
 	struct platform_device *pdev;
 	struct dss_module_power mp[DP_MAX_PM];
-	struct dp_pinctrl pinctrl;
 	struct dp_io io;
-	struct dp_display_data disp_data;
 	u32 max_dp_lanes;
 	u32 max_dp_link_rate;
 	struct drm_bridge *next_bridge;
-- 
2.39.2

[PATCH 02/14] drm/msm/dp: drop unused fields from dp_power_private

[Dmitry Baryshkov]

Drop unused and obsolete fields from struct dp_power_private.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_power.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_power.c b/drivers/gpu/drm/msm/dp/dp_power.c
index c4843dd69f47..b095a5b47c8b 100644
--- a/drivers/gpu/drm/msm/dp/dp_power.c
+++ b/drivers/gpu/drm/msm/dp/dp_power.c
@@ -16,9 +16,6 @@ struct dp_power_private {
 	struct dp_parser *parser;
 	struct device *dev;
 	struct drm_device *drm_dev;
-	struct clk *link_clk_src;
-	struct clk *pixel_provider;
-	struct clk *link_provider;
 
 	struct dp_power dp_power;
 };
-- 
2.39.2

[PATCH 03/14] drm/msm/dp: parse DT from dp_parser_get

[Dmitry Baryshkov]

It makes little sense to split the submodule get and actual DT parsing.
Call dp_parser_parse() directly from dp_parser_get(), so that the parser
data is fully initialised once it is returned to the caller.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 6 ------
 drivers/gpu/drm/msm/dp/dp_parser.c  | 8 +++++++-
 drivers/gpu/drm/msm/dp/dp_parser.h  | 3 ---
 3 files changed, 7 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index d37d599aec27..67b48f0a6c83 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1266,12 +1266,6 @@ static int dp_display_probe(struct platform_device *pdev)
 		return -EPROBE_DEFER;
 	}
 
-	rc = dp->parser->parse(dp->parser);
-	if (rc) {
-		DRM_ERROR("device tree parsing failed\n");
-		goto err;
-	}
-
 	rc = dp_power_client_init(dp->power);
 	if (rc) {
 		DRM_ERROR("Power client create failed\n");
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index 7032dcc8842b..2d9d126c119b 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -315,13 +315,19 @@ static int dp_parser_parse(struct dp_parser *parser)
 struct dp_parser *dp_parser_get(struct platform_device *pdev)
 {
 	struct dp_parser *parser;
+	int ret;
 
 	parser = devm_kzalloc(&pdev->dev, sizeof(*parser), GFP_KERNEL);
 	if (!parser)
 		return ERR_PTR(-ENOMEM);
 
-	parser->parse = dp_parser_parse;
 	parser->pdev = pdev;
 
+	ret = dp_parser_parse(parser);
+	if (ret) {
+		dev_err(&pdev->dev, "device tree parsing failed\n");
+		return ERR_PTR(ret);
+	}
+
 	return parser;
 }
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 90a2cdbbe344..4ccc432b4142 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -67,7 +67,6 @@ struct dss_module_power {
  *
  * @pdev: platform data of the client
  * @mp: gpio, regulator and clock related data
- * @parse: function to be called by client to parse device tree.
  */
 struct dp_parser {
 	struct platform_device *pdev;
@@ -76,8 +75,6 @@ struct dp_parser {
 	u32 max_dp_lanes;
 	u32 max_dp_link_rate;
 	struct drm_bridge *next_bridge;
-
-	int (*parse)(struct dp_parser *parser);
 };
 
 /**
-- 
2.39.2

[PATCH 04/14] drm/msm/dp: inline dp_power_(de)init

[Dmitry Baryshkov]

In preparation to cleanup of the dp_power module, inline dp_power_init()
and dp_power_deinit() functions, which are now just turning the clocks
on and off.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c |  4 ++--
 drivers/gpu/drm/msm/dp/dp_power.c   | 10 ----------
 drivers/gpu/drm/msm/dp/dp_power.h   | 21 ---------------------
 3 files changed, 2 insertions(+), 33 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 67b48f0a6c83..8cd18705740f 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -434,7 +434,7 @@ static void dp_display_host_init(struct dp_display_private *dp)
 		dp->dp_display.connector_type, dp->core_initialized,
 		dp->phy_initialized);
 
-	dp_power_init(dp->power);
+	dp_power_clk_enable(dp->power, DP_CORE_PM, true);
 	dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
 	dp_aux_init(dp->aux);
 	dp->core_initialized = true;
@@ -448,7 +448,7 @@ static void dp_display_host_deinit(struct dp_display_private *dp)
 
 	dp_ctrl_reset_irq_ctrl(dp->ctrl, false);
 	dp_aux_deinit(dp->aux);
-	dp_power_deinit(dp->power);
+	dp_power_clk_enable(dp->power, DP_CORE_PM, false);
 	dp->core_initialized = false;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_power.c b/drivers/gpu/drm/msm/dp/dp_power.c
index b095a5b47c8b..f49e3aede308 100644
--- a/drivers/gpu/drm/msm/dp/dp_power.c
+++ b/drivers/gpu/drm/msm/dp/dp_power.c
@@ -152,16 +152,6 @@ int dp_power_client_init(struct dp_power *dp_power)
 	return dp_power_clk_init(power);
 }
 
-int dp_power_init(struct dp_power *dp_power)
-{
-	return dp_power_clk_enable(dp_power, DP_CORE_PM, true);
-}
-
-int dp_power_deinit(struct dp_power *dp_power)
-{
-	return dp_power_clk_enable(dp_power, DP_CORE_PM, false);
-}
-
 struct dp_power *dp_power_get(struct device *dev, struct dp_parser *parser)
 {
 	struct dp_power_private *power;
diff --git a/drivers/gpu/drm/msm/dp/dp_power.h b/drivers/gpu/drm/msm/dp/dp_power.h
index 55ada51edb57..eb836b5aa24a 100644
--- a/drivers/gpu/drm/msm/dp/dp_power.h
+++ b/drivers/gpu/drm/msm/dp/dp_power.h
@@ -22,27 +22,6 @@ struct dp_power {
 	bool stream_clks_on;
 };
 
-/**
- * dp_power_init() - enable power supplies for display controller
- *
- * @power: instance of power module
- * return: 0 if success or error if failure.
- *
- * This API will turn on the regulators and configures gpio's
- * aux/hpd.
- */
-int dp_power_init(struct dp_power *power);
-
-/**
- * dp_power_deinit() - turn off regulators and gpios.
- *
- * @power: instance of power module
- * return: 0 for success
- *
- * This API turns off power and regulators.
- */
-int dp_power_deinit(struct dp_power *power);
-
 /**
  * dp_power_clk_status() - display controller clocks status
  *
-- 
2.39.2

[PATCH 05/14] drm/msm/dp: fold dp_power into dp_ctrl module

[Dmitry Baryshkov]

The dp_power submodule is limited to handling the clocks only following
previous cleanups. Fold it into the dp_ctrl submodule, removing one
unnecessary level of indirection.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/Makefile        |   1 -
 drivers/gpu/drm/msm/dp/dp_ctrl.c    | 151 +++++++++++++++++++++---
 drivers/gpu/drm/msm/dp/dp_ctrl.h    |  17 ++-
 drivers/gpu/drm/msm/dp/dp_display.c |  24 +---
 drivers/gpu/drm/msm/dp/dp_power.c   | 170 ----------------------------
 drivers/gpu/drm/msm/dp/dp_power.h   |  74 ------------
 6 files changed, 153 insertions(+), 284 deletions(-)
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_power.c
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_power.h

diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index b1173128b5b9..8dbdf3fba69e 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -128,7 +128,6 @@ msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \
 	dp/dp_link.o \
 	dp/dp_panel.o \
 	dp/dp_parser.o \
-	dp/dp_power.o \
 	dp/dp_audio.o
 
 msm-$(CONFIG_DRM_FBDEV_EMULATION) += msm_fbdev.o
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 77a8d9366ed7..3e0cd279c36b 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -76,13 +76,16 @@ struct dp_ctrl_private {
 	struct drm_dp_aux *aux;
 	struct dp_panel *panel;
 	struct dp_link *link;
-	struct dp_power *power;
 	struct dp_parser *parser;
 	struct dp_catalog *catalog;
 
 	struct completion idle_comp;
 	struct completion psr_op_comp;
 	struct completion video_comp;
+
+	bool core_clks_on;
+	bool link_clks_on;
+	bool stream_clks_on;
 };
 
 static int dp_aux_link_configure(struct drm_dp_aux *aux,
@@ -1354,7 +1357,7 @@ static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl)
 	phy_power_on(phy);
 
 	dev_pm_opp_set_rate(ctrl->dev, ctrl->link->link_params.rate * 1000);
-	ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, true);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CTRL_PM, true);
 	if (ret)
 		DRM_ERROR("Unable to start link clocks. ret=%d\n", ret);
 
@@ -1502,7 +1505,7 @@ static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl)
 	 * link maintenance.
 	 */
 	dev_pm_opp_set_rate(ctrl->dev, 0);
-	ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CTRL_PM, false);
 	if (ret) {
 		DRM_ERROR("Failed to disable clocks. ret=%d\n", ret);
 		return ret;
@@ -1534,7 +1537,7 @@ static int dp_ctrl_deinitialize_mainlink(struct dp_ctrl_private *ctrl)
 	dp_catalog_ctrl_reset(ctrl->catalog);
 
 	dev_pm_opp_set_rate(ctrl->dev, 0);
-	ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CTRL_PM, false);
 	if (ret) {
 		DRM_ERROR("Failed to disable link clocks. ret=%d\n", ret);
 	}
@@ -1656,7 +1659,7 @@ static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl)
 	pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
 	dp_ctrl_set_clock_rate(ctrl, DP_STREAM_PM, "stream_pixel", pixel_rate * 1000);
 
-	ret = dp_power_clk_enable(ctrl->power, DP_STREAM_PM, true);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, true);
 	if (ret) {
 		DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
 		return ret;
@@ -1752,7 +1755,7 @@ int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl)
 	rate = ctrl->panel->link_info.rate;
 	pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
 
-	dp_power_clk_enable(ctrl->power, DP_CORE_PM, true);
+	dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CORE_PM, true);
 
 	if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) {
 		drm_dbg_dp(ctrl->drm_dev,
@@ -1885,7 +1888,11 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train)
 		ctrl->link->link_params.rate,
 		ctrl->link->link_params.num_lanes, pixel_rate);
 
-	if (!dp_power_clk_status(ctrl->power, DP_CTRL_PM)) { /* link clk is off */
+	drm_dbg_dp(ctrl->drm_dev,
+		"core_clk_on=%d link_clk_on=%d stream_clk_on=%d\n",
+		ctrl->core_clks_on, ctrl->link_clks_on, ctrl->stream_clks_on);
+
+	if (!ctrl->link_clks_on) { /* link clk is off */
 		ret = dp_ctrl_enable_mainlink_clocks(ctrl);
 		if (ret) {
 			DRM_ERROR("Failed to start link clocks. ret=%d\n", ret);
@@ -1895,7 +1902,7 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train)
 
 	dp_ctrl_set_clock_rate(ctrl, DP_STREAM_PM, "stream_pixel", pixel_rate * 1000);
 
-	ret = dp_power_clk_enable(ctrl->power, DP_STREAM_PM, true);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, true);
 	if (ret) {
 		DRM_ERROR("Unable to start pixel clocks. ret=%d\n", ret);
 		goto end;
@@ -1946,13 +1953,13 @@ int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl)
 	dp_io = &ctrl->parser->io;
 	phy = dp_io->phy;
 
-	/* set dongle to D3 (power off) mode */
+	/* set dongle to D3 (ctrl off) mode */
 	dp_link_psm_config(ctrl->link, &ctrl->panel->link_info, true);
 
 	dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
 
-	if (dp_power_clk_status(ctrl->power, DP_STREAM_PM)) {
-		ret = dp_power_clk_enable(ctrl->power, DP_STREAM_PM, false);
+	if (ctrl->stream_clks_on) {
+		ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, false);
 		if (ret) {
 			DRM_ERROR("Failed to disable pclk. ret=%d\n", ret);
 			return ret;
@@ -1960,7 +1967,7 @@ int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl)
 	}
 
 	dev_pm_opp_set_rate(ctrl->dev, 0);
-	ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CTRL_PM, false);
 	if (ret) {
 		DRM_ERROR("Failed to disable link clocks. ret=%d\n", ret);
 		return ret;
@@ -1990,7 +1997,7 @@ int dp_ctrl_off_link(struct dp_ctrl *dp_ctrl)
 
 	dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
 
-	ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CTRL_PM, false);
 	if (ret) {
 		DRM_ERROR("Failed to disable link clocks. ret=%d\n", ret);
 	}
@@ -2024,12 +2031,12 @@ int dp_ctrl_off(struct dp_ctrl *dp_ctrl)
 
 	dp_catalog_ctrl_reset(ctrl->catalog);
 
-	ret = dp_power_clk_enable(ctrl->power, DP_STREAM_PM, false);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, false);
 	if (ret)
 		DRM_ERROR("Failed to disable pixel clocks. ret=%d\n", ret);
 
 	dev_pm_opp_set_rate(ctrl->dev, 0);
-	ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false);
+	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CTRL_PM, false);
 	if (ret) {
 		DRM_ERROR("Failed to disable link clocks. ret=%d\n", ret);
 	}
@@ -2086,9 +2093,114 @@ irqreturn_t dp_ctrl_isr(struct dp_ctrl *dp_ctrl)
 	return ret;
 }
 
+int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
+		enum dp_pm_type pm_type, bool enable)
+{
+	int rc = 0;
+	struct dp_ctrl_private *ctrl;
+	struct dss_module_power *mp;
+
+	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
+
+	if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM &&
+			pm_type != DP_STREAM_PM) {
+		DRM_ERROR("unsupported ctrl module: %s\n",
+				dp_parser_pm_name(pm_type));
+		return -EINVAL;
+	}
+
+	if (enable) {
+		if (pm_type == DP_CORE_PM && ctrl->core_clks_on) {
+			drm_dbg_dp(ctrl->drm_dev,
+					"core clks already enabled\n");
+			return 0;
+		}
+
+		if (pm_type == DP_CTRL_PM && ctrl->link_clks_on) {
+			drm_dbg_dp(ctrl->drm_dev,
+					"links clks already enabled\n");
+			return 0;
+		}
+
+		if (pm_type == DP_STREAM_PM && ctrl->stream_clks_on) {
+			drm_dbg_dp(ctrl->drm_dev,
+					"pixel clks already enabled\n");
+			return 0;
+		}
+
+		if ((pm_type == DP_CTRL_PM) && (!ctrl->core_clks_on)) {
+			drm_dbg_dp(ctrl->drm_dev,
+					"Enable core clks before link clks\n");
+			mp = &ctrl->parser->mp[DP_CORE_PM];
+
+			rc = clk_bulk_prepare_enable(mp->num_clk, mp->clocks);
+			if (rc)
+				return rc;
+
+			ctrl->core_clks_on = true;
+		}
+	}
+
+	mp = &ctrl->parser->mp[pm_type];
+	if (enable) {
+		rc = clk_bulk_prepare_enable(mp->num_clk, mp->clocks);
+		if (rc)
+			return rc;
+	} else {
+		clk_bulk_disable_unprepare(mp->num_clk, mp->clocks);
+	}
+
+	if (pm_type == DP_CORE_PM)
+		ctrl->core_clks_on = enable;
+	else if (pm_type == DP_STREAM_PM)
+		ctrl->stream_clks_on = enable;
+	else
+		ctrl->link_clks_on = enable;
+
+	drm_dbg_dp(ctrl->drm_dev, "%s clocks for %s\n",
+			enable ? "enable" : "disable",
+			dp_parser_pm_name(pm_type));
+	drm_dbg_dp(ctrl->drm_dev,
+		"stream_clks:%s link_clks:%s core_clks:%s\n",
+		ctrl->stream_clks_on ? "on" : "off",
+		ctrl->link_clks_on ? "on" : "off",
+		ctrl->core_clks_on ? "on" : "off");
+
+	return 0;
+}
+
+static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl)
+{
+	struct dp_ctrl_private *ctrl_private;
+	int rc = 0;
+	struct dss_module_power *core, *ctrl, *stream;
+	struct device *dev;
+
+	ctrl_private = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
+	dev = ctrl_private->dev;
+
+	core = &ctrl_private->parser->mp[DP_CORE_PM];
+	ctrl = &ctrl_private->parser->mp[DP_CTRL_PM];
+	stream = &ctrl_private->parser->mp[DP_STREAM_PM];
+
+	rc = devm_clk_bulk_get(dev, core->num_clk, core->clocks);
+	if (rc)
+		return rc;
+
+	rc = devm_clk_bulk_get(dev, ctrl->num_clk, ctrl->clocks);
+	if (rc)
+		return -ENODEV;
+
+	rc = devm_clk_bulk_get(dev, stream->num_clk, stream->clocks);
+	if (rc)
+		return -ENODEV;
+
+	return 0;
+}
+
 struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
 			struct dp_panel *panel,	struct drm_dp_aux *aux,
-			struct dp_power *power, struct dp_catalog *catalog,
+			struct dp_catalog *catalog,
 			struct dp_parser *parser)
 {
 	struct dp_ctrl_private *ctrl;
@@ -2125,11 +2237,16 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
 	/* in parameters */
 	ctrl->parser   = parser;
 	ctrl->panel    = panel;
-	ctrl->power    = power;
 	ctrl->aux      = aux;
 	ctrl->link     = link;
 	ctrl->catalog  = catalog;
 	ctrl->dev      = dev;
 
+	ret = dp_ctrl_clk_init(&ctrl->dp_ctrl);
+	if (ret) {
+		dev_err(dev, "failed to init clocks\n");
+		return ERR_PTR(ret);
+	}
+
 	return &ctrl->dp_ctrl;
 }
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index b2c27d3532bf..36e7c52a730a 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -10,7 +10,6 @@
 #include "dp_panel.h"
 #include "dp_link.h"
 #include "dp_parser.h"
-#include "dp_power.h"
 #include "dp_catalog.h"
 
 struct dp_ctrl {
@@ -28,7 +27,7 @@ irqreturn_t dp_ctrl_isr(struct dp_ctrl *dp_ctrl);
 void dp_ctrl_handle_sink_request(struct dp_ctrl *dp_ctrl);
 struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
 			struct dp_panel *panel,	struct drm_dp_aux *aux,
-			struct dp_power *power, struct dp_catalog *catalog,
+			struct dp_catalog *catalog,
 			struct dp_parser *parser);
 
 void dp_ctrl_reset_irq_ctrl(struct dp_ctrl *dp_ctrl, bool enable);
@@ -39,4 +38,18 @@ void dp_ctrl_irq_phy_exit(struct dp_ctrl *dp_ctrl);
 void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enable);
 void dp_ctrl_config_psr(struct dp_ctrl *dp_ctrl);
 
+/**
+ * dp_ctrl_clk_enable() - enable display controller clocks
+ *
+ * @ctrl: instance of ctrl module
+ * @pm_type: type of pm, core/ctrl/phy
+ * @enable: enables or disables
+ * return: pointer to allocated ctrl module data
+ *
+ * This API will call enable for DP clocks
+ */
+
+int dp_ctrl_clk_enable(struct dp_ctrl *ctrl, enum dp_pm_type pm_type,
+				bool enable);
+
 #endif /* _DP_CTRL_H_ */
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 8cd18705740f..33e9d7deb3f8 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -15,13 +15,12 @@
 #include "msm_drv.h"
 #include "msm_kms.h"
 #include "dp_parser.h"
-#include "dp_power.h"
+#include "dp_ctrl.h"
 #include "dp_catalog.h"
 #include "dp_aux.h"
 #include "dp_reg.h"
 #include "dp_link.h"
 #include "dp_panel.h"
-#include "dp_ctrl.h"
 #include "dp_display.h"
 #include "dp_drm.h"
 #include "dp_audio.h"
@@ -89,7 +88,6 @@ struct dp_display_private {
 	struct dentry *root;
 
 	struct dp_parser  *parser;
-	struct dp_power   *power;
 	struct dp_catalog *catalog;
 	struct drm_dp_aux *aux;
 	struct dp_link    *link;
@@ -434,7 +432,7 @@ static void dp_display_host_init(struct dp_display_private *dp)
 		dp->dp_display.connector_type, dp->core_initialized,
 		dp->phy_initialized);
 
-	dp_power_clk_enable(dp->power, DP_CORE_PM, true);
+	dp_ctrl_clk_enable(dp->ctrl, DP_CORE_PM, true);
 	dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
 	dp_aux_init(dp->aux);
 	dp->core_initialized = true;
@@ -448,7 +446,7 @@ static void dp_display_host_deinit(struct dp_display_private *dp)
 
 	dp_ctrl_reset_irq_ctrl(dp->ctrl, false);
 	dp_aux_deinit(dp->aux);
-	dp_power_clk_enable(dp->power, DP_CORE_PM, false);
+	dp_ctrl_clk_enable(dp->ctrl, DP_CORE_PM, false);
 	dp->core_initialized = false;
 }
 
@@ -731,14 +729,6 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 		goto error;
 	}
 
-	dp->power = dp_power_get(dev, dp->parser);
-	if (IS_ERR(dp->power)) {
-		rc = PTR_ERR(dp->power);
-		DRM_ERROR("failed to initialize power, rc = %d\n", rc);
-		dp->power = NULL;
-		goto error;
-	}
-
 	dp->aux = dp_aux_get(dev, dp->catalog, dp->dp_display.is_edp);
 	if (IS_ERR(dp->aux)) {
 		rc = PTR_ERR(dp->aux);
@@ -768,7 +758,7 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 	}
 
 	dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
-			       dp->power, dp->catalog, dp->parser);
+			       dp->catalog, dp->parser);
 	if (IS_ERR(dp->ctrl)) {
 		rc = PTR_ERR(dp->ctrl);
 		DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
@@ -1266,12 +1256,6 @@ static int dp_display_probe(struct platform_device *pdev)
 		return -EPROBE_DEFER;
 	}
 
-	rc = dp_power_client_init(dp->power);
-	if (rc) {
-		DRM_ERROR("Power client create failed\n");
-		goto err;
-	}
-
 	/* setup event q */
 	mutex_init(&dp->event_mutex);
 	init_waitqueue_head(&dp->event_q);
diff --git a/drivers/gpu/drm/msm/dp/dp_power.c b/drivers/gpu/drm/msm/dp/dp_power.c
deleted file mode 100644
index f49e3aede308..000000000000
--- a/drivers/gpu/drm/msm/dp/dp_power.c
+++ /dev/null
@@ -1,170 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
- */
-
-#define pr_fmt(fmt)	"[drm-dp] %s: " fmt, __func__
-
-#include <linux/clk.h>
-#include <linux/clk-provider.h>
-#include <linux/regulator/consumer.h>
-#include <linux/pm_opp.h>
-#include "dp_power.h"
-#include "msm_drv.h"
-
-struct dp_power_private {
-	struct dp_parser *parser;
-	struct device *dev;
-	struct drm_device *drm_dev;
-
-	struct dp_power dp_power;
-};
-
-static int dp_power_clk_init(struct dp_power_private *power)
-{
-	int rc = 0;
-	struct dss_module_power *core, *ctrl, *stream;
-	struct device *dev = power->dev;
-
-	core = &power->parser->mp[DP_CORE_PM];
-	ctrl = &power->parser->mp[DP_CTRL_PM];
-	stream = &power->parser->mp[DP_STREAM_PM];
-
-	rc = devm_clk_bulk_get(dev, core->num_clk, core->clocks);
-	if (rc)
-		return rc;
-
-	rc = devm_clk_bulk_get(dev, ctrl->num_clk, ctrl->clocks);
-	if (rc)
-		return -ENODEV;
-
-	rc = devm_clk_bulk_get(dev, stream->num_clk, stream->clocks);
-	if (rc)
-		return -ENODEV;
-
-	return 0;
-}
-
-int dp_power_clk_status(struct dp_power *dp_power, enum dp_pm_type pm_type)
-{
-	struct dp_power_private *power;
-
-	power = container_of(dp_power, struct dp_power_private, dp_power);
-
-	drm_dbg_dp(power->drm_dev,
-		"core_clk_on=%d link_clk_on=%d stream_clk_on=%d\n",
-		dp_power->core_clks_on, dp_power->link_clks_on, dp_power->stream_clks_on);
-
-	if (pm_type == DP_CORE_PM)
-		return dp_power->core_clks_on;
-
-	if (pm_type == DP_CTRL_PM)
-		return dp_power->link_clks_on;
-
-	if (pm_type == DP_STREAM_PM)
-		return dp_power->stream_clks_on;
-
-	return 0;
-}
-
-int dp_power_clk_enable(struct dp_power *dp_power,
-		enum dp_pm_type pm_type, bool enable)
-{
-	int rc = 0;
-	struct dp_power_private *power;
-	struct dss_module_power *mp;
-
-	power = container_of(dp_power, struct dp_power_private, dp_power);
-
-	if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM &&
-			pm_type != DP_STREAM_PM) {
-		DRM_ERROR("unsupported power module: %s\n",
-				dp_parser_pm_name(pm_type));
-		return -EINVAL;
-	}
-
-	if (enable) {
-		if (pm_type == DP_CORE_PM && dp_power->core_clks_on) {
-			drm_dbg_dp(power->drm_dev,
-					"core clks already enabled\n");
-			return 0;
-		}
-
-		if (pm_type == DP_CTRL_PM && dp_power->link_clks_on) {
-			drm_dbg_dp(power->drm_dev,
-					"links clks already enabled\n");
-			return 0;
-		}
-
-		if (pm_type == DP_STREAM_PM && dp_power->stream_clks_on) {
-			drm_dbg_dp(power->drm_dev,
-					"pixel clks already enabled\n");
-			return 0;
-		}
-
-		if ((pm_type == DP_CTRL_PM) && (!dp_power->core_clks_on)) {
-			drm_dbg_dp(power->drm_dev,
-					"Enable core clks before link clks\n");
-			mp = &power->parser->mp[DP_CORE_PM];
-
-			rc = clk_bulk_prepare_enable(mp->num_clk, mp->clocks);
-			if (rc)
-				return rc;
-
-			dp_power->core_clks_on = true;
-		}
-	}
-
-	mp = &power->parser->mp[pm_type];
-	if (enable) {
-		rc = clk_bulk_prepare_enable(mp->num_clk, mp->clocks);
-		if (rc)
-			return rc;
-	} else {
-		clk_bulk_disable_unprepare(mp->num_clk, mp->clocks);
-	}
-
-	if (pm_type == DP_CORE_PM)
-		dp_power->core_clks_on = enable;
-	else if (pm_type == DP_STREAM_PM)
-		dp_power->stream_clks_on = enable;
-	else
-		dp_power->link_clks_on = enable;
-
-	drm_dbg_dp(power->drm_dev, "%s clocks for %s\n",
-			enable ? "enable" : "disable",
-			dp_parser_pm_name(pm_type));
-	drm_dbg_dp(power->drm_dev,
-		"strem_clks:%s link_clks:%s core_clks:%s\n",
-		dp_power->stream_clks_on ? "on" : "off",
-		dp_power->link_clks_on ? "on" : "off",
-		dp_power->core_clks_on ? "on" : "off");
-
-	return 0;
-}
-
-int dp_power_client_init(struct dp_power *dp_power)
-{
-	struct dp_power_private *power;
-
-	power = container_of(dp_power, struct dp_power_private, dp_power);
-
-	return dp_power_clk_init(power);
-}
-
-struct dp_power *dp_power_get(struct device *dev, struct dp_parser *parser)
-{
-	struct dp_power_private *power;
-	struct dp_power *dp_power;
-
-	power = devm_kzalloc(dev, sizeof(*power), GFP_KERNEL);
-	if (!power)
-		return ERR_PTR(-ENOMEM);
-
-	power->parser = parser;
-	power->dev = dev;
-
-	dp_power = &power->dp_power;
-
-	return dp_power;
-}
diff --git a/drivers/gpu/drm/msm/dp/dp_power.h b/drivers/gpu/drm/msm/dp/dp_power.h
deleted file mode 100644
index eb836b5aa24a..000000000000
--- a/drivers/gpu/drm/msm/dp/dp_power.h
+++ /dev/null
@@ -1,74 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
- */
-
-#ifndef _DP_POWER_H_
-#define _DP_POWER_H_
-
-#include "dp_parser.h"
-
-/**
- * sruct dp_power - DisplayPort's power related data
- *
- * @init: initializes the regulators/core clocks/GPIOs/pinctrl
- * @deinit: turns off the regulators/core clocks/GPIOs/pinctrl
- * @clk_enable: enable/disable the DP clocks
- * @set_pixel_clk_parent: set the parent of DP pixel clock
- */
-struct dp_power {
-	bool core_clks_on;
-	bool link_clks_on;
-	bool stream_clks_on;
-};
-
-/**
- * dp_power_clk_status() - display controller clocks status
- *
- * @power: instance of power module
- * @pm_type: type of pm, core/ctrl/phy
- * return: status of power clocks
- *
- * This API return status of DP clocks
- */
-
-int dp_power_clk_status(struct dp_power *dp_power, enum dp_pm_type pm_type);
-
-/**
- * dp_power_clk_enable() - enable display controller clocks
- *
- * @power: instance of power module
- * @pm_type: type of pm, core/ctrl/phy
- * @enable: enables or disables
- * return: pointer to allocated power module data
- *
- * This API will call setrate and enable for DP clocks
- */
-
-int dp_power_clk_enable(struct dp_power *power, enum dp_pm_type pm_type,
-				bool enable);
-
-/**
- * dp_power_client_init() - initialize clock and regulator modules
- *
- * @power: instance of power module
- * return: 0 for success, error for failure.
- *
- * This API will configure the DisplayPort's clocks and regulator
- * modules.
- */
-int dp_power_client_init(struct dp_power *power);
-
-/**
- * dp_power_get() - configure and get the DisplayPort power module data
- *
- * @parser: instance of parser module
- * return: pointer to allocated power module data
- *
- * This API will configure the DisplayPort's power module and provides
- * methods to be called by the client to configure the power related
- * modules.
- */
-struct dp_power *dp_power_get(struct device *dev, struct dp_parser *parser);
-
-#endif /* _DP_POWER_H_ */
-- 
2.39.2

[PATCH 06/14] drm/msm/dp: simplify stream clocks handling

[Dmitry Baryshkov]

There is only a single DP_STREAM_PM clock, stream_pixel. Instead of
using a separate dss_module_power instance for this single clock, handle
this clock directly. This allows us to drop several wrapping functions.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_ctrl.c   | 91 +++++++++++++-----------------
 drivers/gpu/drm/msm/dp/dp_parser.c | 41 +++-----------
 drivers/gpu/drm/msm/dp/dp_parser.h |  2 -
 3 files changed, 47 insertions(+), 87 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 3e0cd279c36b..088bd35695f6 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -79,6 +79,8 @@ struct dp_ctrl_private {
 	struct dp_parser *parser;
 	struct dp_catalog *catalog;
 
+	struct clk *pixel_clk;
+
 	struct completion idle_comp;
 	struct completion psr_op_comp;
 	struct completion video_comp;
@@ -1320,27 +1322,6 @@ static int dp_ctrl_setup_main_link(struct dp_ctrl_private *ctrl,
 	return ret;
 }
 
-static void dp_ctrl_set_clock_rate(struct dp_ctrl_private *ctrl,
-			enum dp_pm_type module, char *name, unsigned long rate)
-{
-	u32 num = ctrl->parser->mp[module].num_clk;
-	struct clk_bulk_data *cfg = ctrl->parser->mp[module].clocks;
-
-	while (num && strcmp(cfg->id, name)) {
-		num--;
-		cfg++;
-	}
-
-	drm_dbg_dp(ctrl->drm_dev, "setting rate=%lu on clk=%s\n",
-						rate, name);
-
-	if (num)
-		clk_set_rate(cfg->clk, rate);
-	else
-		DRM_ERROR("%s clock doesn't exit to set rate %lu\n",
-				name, rate);
-}
-
 static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl)
 {
 	int ret = 0;
@@ -1657,14 +1638,23 @@ static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl)
 	}
 
 	pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
-	dp_ctrl_set_clock_rate(ctrl, DP_STREAM_PM, "stream_pixel", pixel_rate * 1000);
-
-	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, true);
+	ret = clk_set_rate(ctrl->pixel_clk, pixel_rate * 1000);
 	if (ret) {
-		DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
+		DRM_ERROR("Failed to set pixel clock rate. ret=%d\n", ret);
 		return ret;
 	}
 
+	if (ctrl->stream_clks_on) {
+		drm_dbg_dp(ctrl->drm_dev, "pixel clks already enabled\n");
+	} else {
+		ret = clk_prepare_enable(ctrl->pixel_clk);
+		if (ret) {
+			DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
+			return ret;
+		}
+		ctrl->stream_clks_on = true;
+	}
+
 	dp_ctrl_send_phy_test_pattern(ctrl);
 
 	return 0;
@@ -1900,14 +1890,23 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train)
 		}
 	}
 
-	dp_ctrl_set_clock_rate(ctrl, DP_STREAM_PM, "stream_pixel", pixel_rate * 1000);
-
-	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, true);
+	ret = clk_set_rate(ctrl->pixel_clk, pixel_rate * 1000);
 	if (ret) {
-		DRM_ERROR("Unable to start pixel clocks. ret=%d\n", ret);
+		DRM_ERROR("Failed to set pixel clock rate. ret=%d\n", ret);
 		goto end;
 	}
 
+	if (ctrl->stream_clks_on) {
+		drm_dbg_dp(ctrl->drm_dev, "pixel clks already enabled\n");
+	} else {
+		ret = clk_prepare_enable(ctrl->pixel_clk);
+		if (ret) {
+			DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
+			goto end;
+		}
+		ctrl->stream_clks_on = true;
+	}
+
 	if (force_link_train || !dp_ctrl_channel_eq_ok(ctrl))
 		dp_ctrl_link_retrain(ctrl);
 
@@ -1959,11 +1958,8 @@ int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl)
 	dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
 
 	if (ctrl->stream_clks_on) {
-		ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, false);
-		if (ret) {
-			DRM_ERROR("Failed to disable pclk. ret=%d\n", ret);
-			return ret;
-		}
+		clk_disable_unprepare(ctrl->pixel_clk);
+		ctrl->stream_clks_on = false;
 	}
 
 	dev_pm_opp_set_rate(ctrl->dev, 0);
@@ -2031,9 +2027,10 @@ int dp_ctrl_off(struct dp_ctrl *dp_ctrl)
 
 	dp_catalog_ctrl_reset(ctrl->catalog);
 
-	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_STREAM_PM, false);
-	if (ret)
-		DRM_ERROR("Failed to disable pixel clocks. ret=%d\n", ret);
+	if (ctrl->stream_clks_on) {
+		clk_disable_unprepare(ctrl->pixel_clk);
+		ctrl->stream_clks_on = false;
+	}
 
 	dev_pm_opp_set_rate(ctrl->dev, 0);
 	ret = dp_ctrl_clk_enable(&ctrl->dp_ctrl, DP_CTRL_PM, false);
@@ -2102,8 +2099,7 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
 
 	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
 
-	if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM &&
-			pm_type != DP_STREAM_PM) {
+	if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM) {
 		DRM_ERROR("unsupported ctrl module: %s\n",
 				dp_parser_pm_name(pm_type));
 		return -EINVAL;
@@ -2122,12 +2118,6 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
 			return 0;
 		}
 
-		if (pm_type == DP_STREAM_PM && ctrl->stream_clks_on) {
-			drm_dbg_dp(ctrl->drm_dev,
-					"pixel clks already enabled\n");
-			return 0;
-		}
-
 		if ((pm_type == DP_CTRL_PM) && (!ctrl->core_clks_on)) {
 			drm_dbg_dp(ctrl->drm_dev,
 					"Enable core clks before link clks\n");
@@ -2152,8 +2142,6 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
 
 	if (pm_type == DP_CORE_PM)
 		ctrl->core_clks_on = enable;
-	else if (pm_type == DP_STREAM_PM)
-		ctrl->stream_clks_on = enable;
 	else
 		ctrl->link_clks_on = enable;
 
@@ -2173,7 +2161,7 @@ static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl)
 {
 	struct dp_ctrl_private *ctrl_private;
 	int rc = 0;
-	struct dss_module_power *core, *ctrl, *stream;
+	struct dss_module_power *core, *ctrl;
 	struct device *dev;
 
 	ctrl_private = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
@@ -2181,7 +2169,6 @@ static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl)
 
 	core = &ctrl_private->parser->mp[DP_CORE_PM];
 	ctrl = &ctrl_private->parser->mp[DP_CTRL_PM];
-	stream = &ctrl_private->parser->mp[DP_STREAM_PM];
 
 	rc = devm_clk_bulk_get(dev, core->num_clk, core->clocks);
 	if (rc)
@@ -2191,9 +2178,9 @@ static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl)
 	if (rc)
 		return -ENODEV;
 
-	rc = devm_clk_bulk_get(dev, stream->num_clk, stream->clocks);
-	if (rc)
-		return -ENODEV;
+	ctrl_private->pixel_clk = devm_clk_get(dev, "stream_pixel");
+	if (IS_ERR(ctrl_private->pixel_clk))
+		return PTR_ERR(ctrl_private->pixel_clk);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index 2d9d126c119b..fe2b75f7555a 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -150,12 +150,11 @@ static inline bool dp_parser_check_prefix(const char *clk_prefix,
 static int dp_parser_init_clk_data(struct dp_parser *parser)
 {
 	int num_clk, i, rc;
-	int core_clk_count = 0, ctrl_clk_count = 0, stream_clk_count = 0;
+	int core_clk_count = 0, ctrl_clk_count = 0;
 	const char *clk_name;
 	struct device *dev = &parser->pdev->dev;
 	struct dss_module_power *core_power = &parser->mp[DP_CORE_PM];
 	struct dss_module_power *ctrl_power = &parser->mp[DP_CTRL_PM];
-	struct dss_module_power *stream_power = &parser->mp[DP_STREAM_PM];
 
 	num_clk = of_property_count_strings(dev->of_node, "clock-names");
 	if (num_clk <= 0) {
@@ -174,9 +173,6 @@ static int dp_parser_init_clk_data(struct dp_parser *parser)
 
 		if (dp_parser_check_prefix("ctrl", clk_name))
 			ctrl_clk_count++;
-
-		if (dp_parser_check_prefix("stream", clk_name))
-			stream_clk_count++;
 	}
 
 	/* Initialize the CORE power module */
@@ -207,47 +203,30 @@ static int dp_parser_init_clk_data(struct dp_parser *parser)
 		return -ENOMEM;
 	}
 
-	/* Initialize the STREAM power module */
-	if (stream_clk_count == 0) {
-		DRM_ERROR("no stream (pixel) clocks are defined\n");
-		return -EINVAL;
-	}
-
-	stream_power->num_clk = stream_clk_count;
-	stream_power->clocks = devm_kcalloc(dev,
-			stream_power->num_clk, sizeof(struct clk_bulk_data),
-			GFP_KERNEL);
-	if (!stream_power->clocks) {
-		stream_power->num_clk = 0;
-		return -ENOMEM;
-	}
-
-	return 0;
+	return num_clk;
 }
 
 static int dp_parser_clock(struct dp_parser *parser)
 {
 	int rc = 0, i = 0;
 	int num_clk = 0;
-	int core_clk_index = 0, ctrl_clk_index = 0, stream_clk_index = 0;
-	int core_clk_count = 0, ctrl_clk_count = 0, stream_clk_count = 0;
+	int core_clk_index = 0, ctrl_clk_index = 0;
+	int core_clk_count = 0, ctrl_clk_count = 0;
 	const char *clk_name;
 	struct device *dev = &parser->pdev->dev;
 	struct dss_module_power *core_power = &parser->mp[DP_CORE_PM];
 	struct dss_module_power *ctrl_power = &parser->mp[DP_CTRL_PM];
-	struct dss_module_power *stream_power = &parser->mp[DP_STREAM_PM];
 
 	rc =  dp_parser_init_clk_data(parser);
-	if (rc) {
+	if (rc < 0) {
 		DRM_ERROR("failed to initialize power data %d\n", rc);
-		return -EINVAL;
+		return rc;
 	}
 
+	num_clk = rc;
+
 	core_clk_count = core_power->num_clk;
 	ctrl_clk_count = ctrl_power->num_clk;
-	stream_clk_count = stream_power->num_clk;
-
-	num_clk = core_clk_count + ctrl_clk_count + stream_clk_count;
 
 	for (i = 0; i < num_clk; i++) {
 		rc = of_property_read_string_index(dev->of_node, "clock-names",
@@ -260,10 +239,6 @@ static int dp_parser_clock(struct dp_parser *parser)
 				core_clk_index < core_clk_count) {
 			core_power->clocks[core_clk_index].id = devm_kstrdup(dev, clk_name, GFP_KERNEL);
 			core_clk_index++;
-		} else if (dp_parser_check_prefix("stream", clk_name) &&
-				stream_clk_index < stream_clk_count) {
-			stream_power->clocks[stream_clk_index].id = devm_kstrdup(dev, clk_name, GFP_KERNEL);
-			stream_clk_index++;
 		} else if (dp_parser_check_prefix("ctrl", clk_name) &&
 			   ctrl_clk_index < ctrl_clk_count) {
 			ctrl_power->clocks[ctrl_clk_index].id = devm_kstrdup(dev, clk_name, GFP_KERNEL);
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 4ccc432b4142..c6fe26602e07 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -19,7 +19,6 @@
 enum dp_pm_type {
 	DP_CORE_PM,
 	DP_CTRL_PM,
-	DP_STREAM_PM,
 	DP_MAX_PM
 };
 
@@ -40,7 +39,6 @@ static inline const char *dp_parser_pm_name(enum dp_pm_type module)
 	switch (module) {
 	case DP_CORE_PM:	return "DP_CORE_PM";
 	case DP_CTRL_PM:	return "DP_CTRL_PM";
-	case DP_STREAM_PM:	return "DP_STREAM_PM";
 	default:		return "???";
 	}
 }
-- 
2.39.2

[PATCH 07/14] drm/msm/dp: stop parsing clock names from DT

[Dmitry Baryshkov]

All supported platforms use the same clocks configuration. Instead of
parsing names from DT in a pretty complex manner, use the static
configuration. If at some point newer (or older) platforms have
different clock configuration, this clock config can be moved to the
device data.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_ctrl.c   |  55 ++++++++++++--
 drivers/gpu/drm/msm/dp/dp_ctrl.h   |   6 ++
 drivers/gpu/drm/msm/dp/dp_parser.c | 112 -----------------------------
 drivers/gpu/drm/msm/dp/dp_parser.h |  22 ------
 4 files changed, 54 insertions(+), 141 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 088bd35695f6..9b59a29547c0 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -69,6 +69,11 @@ struct dp_vc_tu_mapping_table {
 	u8 tu_size_minus1;
 };
 
+struct dss_module_power {
+	unsigned int num_clk;
+	struct clk_bulk_data *clocks;
+};
+
 struct dp_ctrl_private {
 	struct dp_ctrl dp_ctrl;
 	struct drm_device *drm_dev;
@@ -79,6 +84,7 @@ struct dp_ctrl_private {
 	struct dp_parser *parser;
 	struct dp_catalog *catalog;
 
+	struct dss_module_power mp[DP_MAX_PM];
 	struct clk *pixel_clk;
 
 	struct completion idle_comp;
@@ -90,6 +96,15 @@ struct dp_ctrl_private {
 	bool stream_clks_on;
 };
 
+static inline const char *dp_pm_name(enum dp_pm_type module)
+{
+	switch (module) {
+	case DP_CORE_PM:	return "DP_CORE_PM";
+	case DP_CTRL_PM:	return "DP_CTRL_PM";
+	default:		return "???";
+	}
+}
+
 static int dp_aux_link_configure(struct drm_dp_aux *aux,
 					struct dp_link_info *link)
 {
@@ -2101,7 +2116,7 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
 
 	if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM) {
 		DRM_ERROR("unsupported ctrl module: %s\n",
-				dp_parser_pm_name(pm_type));
+				dp_pm_name(pm_type));
 		return -EINVAL;
 	}
 
@@ -2121,7 +2136,7 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
 		if ((pm_type == DP_CTRL_PM) && (!ctrl->core_clks_on)) {
 			drm_dbg_dp(ctrl->drm_dev,
 					"Enable core clks before link clks\n");
-			mp = &ctrl->parser->mp[DP_CORE_PM];
+			mp = &ctrl->mp[DP_CORE_PM];
 
 			rc = clk_bulk_prepare_enable(mp->num_clk, mp->clocks);
 			if (rc)
@@ -2131,7 +2146,7 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
 		}
 	}
 
-	mp = &ctrl->parser->mp[pm_type];
+	mp = &ctrl->mp[pm_type];
 	if (enable) {
 		rc = clk_bulk_prepare_enable(mp->num_clk, mp->clocks);
 		if (rc)
@@ -2147,7 +2162,7 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
 
 	drm_dbg_dp(ctrl->drm_dev, "%s clocks for %s\n",
 			enable ? "enable" : "disable",
-			dp_parser_pm_name(pm_type));
+			dp_pm_name(pm_type));
 	drm_dbg_dp(ctrl->drm_dev,
 		"stream_clks:%s link_clks:%s core_clks:%s\n",
 		ctrl->stream_clks_on ? "on" : "off",
@@ -2157,23 +2172,49 @@ int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
 	return 0;
 }
 
+static const char *core_clks[] = {
+	"core_iface",
+	"core_aux",
+};
+
+static const char *ctrl_clks[] = {
+	"ctrl_link",
+	"ctrl_link_iface",
+};
+
 static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl)
 {
 	struct dp_ctrl_private *ctrl_private;
-	int rc = 0;
 	struct dss_module_power *core, *ctrl;
 	struct device *dev;
+	int i, rc;
 
 	ctrl_private = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
 	dev = ctrl_private->dev;
 
-	core = &ctrl_private->parser->mp[DP_CORE_PM];
-	ctrl = &ctrl_private->parser->mp[DP_CTRL_PM];
+	core = &ctrl_private->mp[DP_CORE_PM];
+	ctrl = &ctrl_private->mp[DP_CTRL_PM];
+
+	core->num_clk = ARRAY_SIZE(core_clks);
+	core->clocks = devm_kcalloc(dev, core->num_clk, sizeof(*core->clocks), GFP_KERNEL);
+	if (!core->clocks)
+		return -ENOMEM;
+
+	for (i = 0; i < core->num_clk; i++)
+		core->clocks[i].id = core_clks[i];
 
 	rc = devm_clk_bulk_get(dev, core->num_clk, core->clocks);
 	if (rc)
 		return rc;
 
+	ctrl->num_clk = ARRAY_SIZE(ctrl_clks);
+	ctrl->clocks = devm_kcalloc(dev, ctrl->num_clk, sizeof(*ctrl->clocks), GFP_KERNEL);
+	if (!ctrl->clocks)
+		return -ENOMEM;
+
+	for (i = 0; i < ctrl->num_clk; i++)
+		ctrl->clocks[i].id = ctrl_clks[i];
+
 	rc = devm_clk_bulk_get(dev, ctrl->num_clk, ctrl->clocks);
 	if (rc)
 		return -ENODEV;
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index 36e7c52a730a..cc0cd5be9f40 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -17,6 +17,12 @@ struct dp_ctrl {
 	bool wide_bus_en;
 };
 
+enum dp_pm_type {
+	DP_CORE_PM,
+	DP_CTRL_PM,
+	DP_MAX_PM
+};
+
 int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl);
 int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train);
 int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl);
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index fe2b75f7555a..de7cfc340f0c 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -141,114 +141,6 @@ static int dp_parser_misc(struct dp_parser *parser)
 	return 0;
 }
 
-static inline bool dp_parser_check_prefix(const char *clk_prefix,
-						const char *clk_name)
-{
-	return !strncmp(clk_prefix, clk_name, strlen(clk_prefix));
-}
-
-static int dp_parser_init_clk_data(struct dp_parser *parser)
-{
-	int num_clk, i, rc;
-	int core_clk_count = 0, ctrl_clk_count = 0;
-	const char *clk_name;
-	struct device *dev = &parser->pdev->dev;
-	struct dss_module_power *core_power = &parser->mp[DP_CORE_PM];
-	struct dss_module_power *ctrl_power = &parser->mp[DP_CTRL_PM];
-
-	num_clk = of_property_count_strings(dev->of_node, "clock-names");
-	if (num_clk <= 0) {
-		DRM_ERROR("no clocks are defined\n");
-		return -EINVAL;
-	}
-
-	for (i = 0; i < num_clk; i++) {
-		rc = of_property_read_string_index(dev->of_node,
-				"clock-names", i, &clk_name);
-		if (rc < 0)
-			return rc;
-
-		if (dp_parser_check_prefix("core", clk_name))
-			core_clk_count++;
-
-		if (dp_parser_check_prefix("ctrl", clk_name))
-			ctrl_clk_count++;
-	}
-
-	/* Initialize the CORE power module */
-	if (core_clk_count == 0) {
-		DRM_ERROR("no core clocks are defined\n");
-		return -EINVAL;
-	}
-
-	core_power->num_clk = core_clk_count;
-	core_power->clocks = devm_kcalloc(dev,
-			core_power->num_clk, sizeof(struct clk_bulk_data),
-			GFP_KERNEL);
-	if (!core_power->clocks)
-		return -ENOMEM;
-
-	/* Initialize the CTRL power module */
-	if (ctrl_clk_count == 0) {
-		DRM_ERROR("no ctrl clocks are defined\n");
-		return -EINVAL;
-	}
-
-	ctrl_power->num_clk = ctrl_clk_count;
-	ctrl_power->clocks = devm_kcalloc(dev,
-			ctrl_power->num_clk, sizeof(struct clk_bulk_data),
-			GFP_KERNEL);
-	if (!ctrl_power->clocks) {
-		ctrl_power->num_clk = 0;
-		return -ENOMEM;
-	}
-
-	return num_clk;
-}
-
-static int dp_parser_clock(struct dp_parser *parser)
-{
-	int rc = 0, i = 0;
-	int num_clk = 0;
-	int core_clk_index = 0, ctrl_clk_index = 0;
-	int core_clk_count = 0, ctrl_clk_count = 0;
-	const char *clk_name;
-	struct device *dev = &parser->pdev->dev;
-	struct dss_module_power *core_power = &parser->mp[DP_CORE_PM];
-	struct dss_module_power *ctrl_power = &parser->mp[DP_CTRL_PM];
-
-	rc =  dp_parser_init_clk_data(parser);
-	if (rc < 0) {
-		DRM_ERROR("failed to initialize power data %d\n", rc);
-		return rc;
-	}
-
-	num_clk = rc;
-
-	core_clk_count = core_power->num_clk;
-	ctrl_clk_count = ctrl_power->num_clk;
-
-	for (i = 0; i < num_clk; i++) {
-		rc = of_property_read_string_index(dev->of_node, "clock-names",
-				i, &clk_name);
-		if (rc) {
-			DRM_ERROR("error reading clock-names %d\n", rc);
-			return rc;
-		}
-		if (dp_parser_check_prefix("core", clk_name) &&
-				core_clk_index < core_clk_count) {
-			core_power->clocks[core_clk_index].id = devm_kstrdup(dev, clk_name, GFP_KERNEL);
-			core_clk_index++;
-		} else if (dp_parser_check_prefix("ctrl", clk_name) &&
-			   ctrl_clk_index < ctrl_clk_count) {
-			ctrl_power->clocks[ctrl_clk_index].id = devm_kstrdup(dev, clk_name, GFP_KERNEL);
-			ctrl_clk_index++;
-		}
-	}
-
-	return 0;
-}
-
 int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser)
 {
 	struct platform_device *pdev = parser->pdev;
@@ -280,10 +172,6 @@ static int dp_parser_parse(struct dp_parser *parser)
 	if (rc)
 		return rc;
 
-	rc = dp_parser_clock(parser);
-	if (rc)
-		return rc;
-
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index c6fe26602e07..cad82c4d07da 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -16,12 +16,6 @@
 #define DP_MAX_NUM_DP_LANES	4
 #define DP_LINK_RATE_HBR2	540000 /* kbytes */
 
-enum dp_pm_type {
-	DP_CORE_PM,
-	DP_CTRL_PM,
-	DP_MAX_PM
-};
-
 struct dss_io_region {
 	size_t len;
 	void __iomem *base;
@@ -34,15 +28,6 @@ struct dss_io_data {
 	struct dss_io_region p0;
 };
 
-static inline const char *dp_parser_pm_name(enum dp_pm_type module)
-{
-	switch (module) {
-	case DP_CORE_PM:	return "DP_CORE_PM";
-	case DP_CTRL_PM:	return "DP_CTRL_PM";
-	default:		return "???";
-	}
-}
-
 /**
  * struct dp_ctrl_resource - controller's IO related data
  *
@@ -55,20 +40,13 @@ struct dp_io {
 	union phy_configure_opts phy_opts;
 };
 
-struct dss_module_power {
-	unsigned int num_clk;
-	struct clk_bulk_data *clocks;
-};
-
 /**
  * struct dp_parser - DP parser's data exposed to clients
  *
  * @pdev: platform data of the client
- * @mp: gpio, regulator and clock related data
  */
 struct dp_parser {
 	struct platform_device *pdev;
-	struct dss_module_power mp[DP_MAX_PM];
 	struct dp_io io;
 	u32 max_dp_lanes;
 	u32 max_dp_link_rate;
-- 
2.39.2

[PATCH 08/14] drm/msm/dp: move phy_configure_opts to dp_ctrl

[Dmitry Baryshkov]

There is little point in sharing phy configuration structure between
several modules. Move it to dp_ctrl, which becomes the only submodule
re-configuring the PHY.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_catalog.c | 19 -------------
 drivers/gpu/drm/msm/dp/dp_catalog.h |  2 --
 drivers/gpu/drm/msm/dp/dp_ctrl.c    | 41 +++++++++++++++++++----------
 drivers/gpu/drm/msm/dp/dp_parser.h  |  3 ---
 4 files changed, 27 insertions(+), 38 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 5142aeb705a4..e07651768805 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -765,25 +765,6 @@ void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog)
 	dp_write_ahb(catalog, REG_DP_PHY_CTRL, 0x0);
 }
 
-int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog,
-		u8 v_level, u8 p_level)
-{
-	struct dp_catalog_private *catalog = container_of(dp_catalog,
-				struct dp_catalog_private, dp_catalog);
-	struct dp_io *dp_io = catalog->io;
-	struct phy *phy = dp_io->phy;
-	struct phy_configure_opts_dp *opts_dp = &dp_io->phy_opts.dp;
-
-	/* TODO: Update for all lanes instead of just first one */
-	opts_dp->voltage[0] = v_level;
-	opts_dp->pre[0] = p_level;
-	opts_dp->set_voltages = 1;
-	phy_configure(phy, &dp_io->phy_opts);
-	opts_dp->set_voltages = 0;
-
-	return 0;
-}
-
 void dp_catalog_ctrl_send_phy_pattern(struct dp_catalog *dp_catalog,
 			u32 pattern)
 {
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 38786e855b51..ba7c62ba7ca3 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -111,8 +111,6 @@ void dp_catalog_ctrl_set_psr(struct dp_catalog *dp_catalog, bool enter);
 u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog);
 u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog);
-int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level,
-				u8 p_level);
 int dp_catalog_ctrl_get_interrupt(struct dp_catalog *dp_catalog);
 u32 dp_catalog_ctrl_read_psr_interrupt_status(struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_update_transfer_unit(struct dp_catalog *dp_catalog,
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 9b59a29547c0..3bb8bd83fff4 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -87,6 +87,8 @@ struct dp_ctrl_private {
 	struct dss_module_power mp[DP_MAX_PM];
 	struct clk *pixel_clk;
 
+	union phy_configure_opts phy_opts;
+
 	struct completion idle_comp;
 	struct completion psr_op_comp;
 	struct completion video_comp;
@@ -1026,6 +1028,21 @@ static int dp_ctrl_wait4video_ready(struct dp_ctrl_private *ctrl)
 	return ret;
 }
 
+static int dp_ctrl_set_vx_px(struct dp_ctrl_private *ctrl,
+			     u8 v_level, u8 p_level)
+{
+	union phy_configure_opts *phy_opts = &ctrl->phy_opts;
+
+	/* TODO: Update for all lanes instead of just first one */
+	phy_opts->dp.voltage[0] = v_level;
+	phy_opts->dp.pre[0] = p_level;
+	phy_opts->dp.set_voltages = 1;
+	phy_configure(ctrl->parser->io.phy, phy_opts);
+	phy_opts->dp.set_voltages = 0;
+
+	return 0;
+}
+
 static int dp_ctrl_update_vx_px(struct dp_ctrl_private *ctrl)
 {
 	struct dp_link *link = ctrl->link;
@@ -1038,7 +1055,7 @@ static int dp_ctrl_update_vx_px(struct dp_ctrl_private *ctrl)
 	drm_dbg_dp(ctrl->drm_dev,
 		"voltage level: %d emphasis level: %d\n",
 			voltage_swing_level, pre_emphasis_level);
-	ret = dp_catalog_ctrl_update_vx_px(ctrl->catalog,
+	ret = dp_ctrl_set_vx_px(ctrl,
 		voltage_swing_level, pre_emphasis_level);
 
 	if (ret)
@@ -1340,16 +1357,14 @@ static int dp_ctrl_setup_main_link(struct dp_ctrl_private *ctrl,
 static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl)
 {
 	int ret = 0;
-	struct dp_io *dp_io = &ctrl->parser->io;
-	struct phy *phy = dp_io->phy;
-	struct phy_configure_opts_dp *opts_dp = &dp_io->phy_opts.dp;
+	struct phy *phy = ctrl->parser->io.phy;
 	const u8 *dpcd = ctrl->panel->dpcd;
 
-	opts_dp->lanes = ctrl->link->link_params.num_lanes;
-	opts_dp->link_rate = ctrl->link->link_params.rate / 100;
-	opts_dp->ssc = drm_dp_max_downspread(dpcd);
+	ctrl->phy_opts.dp.lanes = ctrl->link->link_params.num_lanes;
+	ctrl->phy_opts.dp.link_rate = ctrl->link->link_params.rate / 100;
+	ctrl->phy_opts.dp.ssc = drm_dp_max_downspread(dpcd);
 
-	phy_configure(phy, &dp_io->phy_opts);
+	phy_configure(phy, &ctrl->phy_opts);
 	phy_power_on(phy);
 
 	dev_pm_opp_set_rate(ctrl->dev, ctrl->link->link_params.rate * 1000);
@@ -1488,13 +1503,11 @@ static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl)
 static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl)
 {
 	int ret = 0;
-	struct dp_io *dp_io = &ctrl->parser->io;
-	struct phy *phy = dp_io->phy;
-	struct phy_configure_opts_dp *opts_dp = &dp_io->phy_opts.dp;
+	struct phy *phy = ctrl->parser->io.phy;
 
 	dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
-	opts_dp->lanes = ctrl->link->link_params.num_lanes;
-	phy_configure(phy, &dp_io->phy_opts);
+	ctrl->phy_opts.dp.lanes = ctrl->link->link_params.num_lanes;
+	phy_configure(phy, &ctrl->phy_opts);
 	/*
 	 * Disable and re-enable the mainlink clock since the
 	 * link clock might have been adjusted as part of the
@@ -1580,7 +1593,7 @@ static bool dp_ctrl_send_phy_test_pattern(struct dp_ctrl_private *ctrl)
 
 	drm_dbg_dp(ctrl->drm_dev, "request: 0x%x\n", pattern_requested);
 
-	if (dp_catalog_ctrl_update_vx_px(ctrl->catalog,
+	if (dp_ctrl_set_vx_px(ctrl,
 			ctrl->link->phy_params.v_level,
 			ctrl->link->phy_params.p_level)) {
 		DRM_ERROR("Failed to set v/p levels\n");
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index cad82c4d07da..b28052e87101 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -7,8 +7,6 @@
 #define _DP_PARSER_H_
 
 #include <linux/platform_device.h>
-#include <linux/phy/phy.h>
-#include <linux/phy/phy-dp.h>
 
 #include "msm_drv.h"
 
@@ -37,7 +35,6 @@ struct dss_io_data {
 struct dp_io {
 	struct dss_io_data dp_controller;
 	struct phy *phy;
-	union phy_configure_opts phy_opts;
 };
 
 /**
-- 
2.39.2

[PATCH 09/14] drm/msm/dp: remove PHY handling from dp_catalog.c

[Dmitry Baryshkov]

Inline dp_catalog_aux_update_cfg() and call phy_calibrate() from dp_aux
functions directly.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_aux.c     |  9 +++++++--
 drivers/gpu/drm/msm/dp/dp_aux.h     |  1 +
 drivers/gpu/drm/msm/dp/dp_catalog.c | 12 ------------
 drivers/gpu/drm/msm/dp/dp_catalog.h |  1 -
 drivers/gpu/drm/msm/dp/dp_display.c |  4 +++-
 5 files changed, 11 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_aux.c b/drivers/gpu/drm/msm/dp/dp_aux.c
index 03f4951c49f4..adbd5a367395 100644
--- a/drivers/gpu/drm/msm/dp/dp_aux.c
+++ b/drivers/gpu/drm/msm/dp/dp_aux.c
@@ -4,6 +4,7 @@
  */
 
 #include <linux/delay.h>
+#include <linux/phy/phy.h>
 #include <drm/drm_print.h>
 
 #include "dp_reg.h"
@@ -23,6 +24,8 @@ struct dp_aux_private {
 	struct device *dev;
 	struct dp_catalog *catalog;
 
+	struct phy *phy;
+
 	struct mutex mutex;
 	struct completion comp;
 
@@ -336,7 +339,7 @@ static ssize_t dp_aux_transfer(struct drm_dp_aux *dp_aux,
 		if (aux->native) {
 			aux->retry_cnt++;
 			if (!(aux->retry_cnt % MAX_AUX_RETRIES))
-				dp_catalog_aux_update_cfg(aux->catalog);
+				phy_calibrate(aux->phy);
 		}
 		/* reset aux if link is in connected state */
 		if (dp_catalog_link_is_connected(aux->catalog))
@@ -439,7 +442,7 @@ void dp_aux_reconfig(struct drm_dp_aux *dp_aux)
 
 	aux = container_of(dp_aux, struct dp_aux_private, dp_aux);
 
-	dp_catalog_aux_update_cfg(aux->catalog);
+	phy_calibrate(aux->phy);
 	dp_catalog_aux_reset(aux->catalog);
 }
 
@@ -517,6 +520,7 @@ static int dp_wait_hpd_asserted(struct drm_dp_aux *dp_aux,
 }
 
 struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog,
+			      struct phy *phy,
 			      bool is_edp)
 {
 	struct dp_aux_private *aux;
@@ -537,6 +541,7 @@ struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog,
 
 	aux->dev = dev;
 	aux->catalog = catalog;
+	aux->phy = phy;
 	aux->retry_cnt = 0;
 
 	/*
diff --git a/drivers/gpu/drm/msm/dp/dp_aux.h b/drivers/gpu/drm/msm/dp/dp_aux.h
index 511305da4f66..16d9b1758748 100644
--- a/drivers/gpu/drm/msm/dp/dp_aux.h
+++ b/drivers/gpu/drm/msm/dp/dp_aux.h
@@ -17,6 +17,7 @@ void dp_aux_deinit(struct drm_dp_aux *dp_aux);
 void dp_aux_reconfig(struct drm_dp_aux *dp_aux);
 
 struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog,
+			      struct phy *phy,
 			      bool is_edp);
 void dp_aux_put(struct drm_dp_aux *aux);
 
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index e07651768805..4c6207797c99 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -7,8 +7,6 @@
 
 #include <linux/delay.h>
 #include <linux/iopoll.h>
-#include <linux/phy/phy.h>
-#include <linux/phy/phy-dp.h>
 #include <linux/rational.h>
 #include <drm/display/drm_dp_helper.h>
 #include <drm/drm_print.h>
@@ -243,16 +241,6 @@ void dp_catalog_aux_enable(struct dp_catalog *dp_catalog, bool enable)
 	dp_write_aux(catalog, REG_DP_AUX_CTRL, aux_ctrl);
 }
 
-void dp_catalog_aux_update_cfg(struct dp_catalog *dp_catalog)
-{
-	struct dp_catalog_private *catalog = container_of(dp_catalog,
-				struct dp_catalog_private, dp_catalog);
-	struct dp_io *dp_io = catalog->io;
-	struct phy *phy = dp_io->phy;
-
-	phy_calibrate(phy);
-}
-
 int dp_catalog_aux_wait_for_hpd_connect_state(struct dp_catalog *dp_catalog)
 {
 	u32 state;
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index ba7c62ba7ca3..1f3f58d4b8de 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -84,7 +84,6 @@ int dp_catalog_aux_clear_trans(struct dp_catalog *dp_catalog, bool read);
 int dp_catalog_aux_clear_hw_interrupts(struct dp_catalog *dp_catalog);
 void dp_catalog_aux_reset(struct dp_catalog *dp_catalog);
 void dp_catalog_aux_enable(struct dp_catalog *dp_catalog, bool enable);
-void dp_catalog_aux_update_cfg(struct dp_catalog *dp_catalog);
 int dp_catalog_aux_wait_for_hpd_connect_state(struct dp_catalog *dp_catalog);
 u32 dp_catalog_aux_get_irq(struct dp_catalog *dp_catalog);
 
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 33e9d7deb3f8..19d9ec1ad48d 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -729,7 +729,9 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 		goto error;
 	}
 
-	dp->aux = dp_aux_get(dev, dp->catalog, dp->dp_display.is_edp);
+	dp->aux = dp_aux_get(dev, dp->catalog,
+			     dp->parser->io.phy,
+			     dp->dp_display.is_edp);
 	if (IS_ERR(dp->aux)) {
 		rc = PTR_ERR(dp->aux);
 		DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
-- 
2.39.2

[PATCH 10/14] drm/msm/dp: handle PHY directly in dp_ctrl

[Dmitry Baryshkov]

There is little point in going trough dp_parser->io indirection each
time the driver needs to access the PHY. Store the pointer directly in
dp_ctrl_private.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_ctrl.c    | 37 ++++++++++-------------------
 drivers/gpu/drm/msm/dp/dp_ctrl.h    |  2 +-
 drivers/gpu/drm/msm/dp/dp_display.c |  3 ++-
 3 files changed, 16 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 3bb8bd83fff4..1ab39b402a0f 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -81,9 +81,10 @@ struct dp_ctrl_private {
 	struct drm_dp_aux *aux;
 	struct dp_panel *panel;
 	struct dp_link *link;
-	struct dp_parser *parser;
 	struct dp_catalog *catalog;
 
+	struct phy *phy;
+
 	struct dss_module_power mp[DP_MAX_PM];
 	struct clk *pixel_clk;
 
@@ -1037,7 +1038,7 @@ static int dp_ctrl_set_vx_px(struct dp_ctrl_private *ctrl,
 	phy_opts->dp.voltage[0] = v_level;
 	phy_opts->dp.pre[0] = p_level;
 	phy_opts->dp.set_voltages = 1;
-	phy_configure(ctrl->parser->io.phy, phy_opts);
+	phy_configure(ctrl->phy, phy_opts);
 	phy_opts->dp.set_voltages = 0;
 
 	return 0;
@@ -1357,7 +1358,7 @@ static int dp_ctrl_setup_main_link(struct dp_ctrl_private *ctrl,
 static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl)
 {
 	int ret = 0;
-	struct phy *phy = ctrl->parser->io.phy;
+	struct phy *phy = ctrl->phy;
 	const u8 *dpcd = ctrl->panel->dpcd;
 
 	ctrl->phy_opts.dp.lanes = ctrl->link->link_params.num_lanes;
@@ -1455,12 +1456,10 @@ void dp_ctrl_set_psr(struct dp_ctrl *dp_ctrl, bool enter)
 void dp_ctrl_phy_init(struct dp_ctrl *dp_ctrl)
 {
 	struct dp_ctrl_private *ctrl;
-	struct dp_io *dp_io;
 	struct phy *phy;
 
 	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
-	dp_io = &ctrl->parser->io;
-	phy = dp_io->phy;
+	phy = ctrl->phy;
 
 	dp_catalog_ctrl_phy_reset(ctrl->catalog);
 	phy_init(phy);
@@ -1472,12 +1471,10 @@ void dp_ctrl_phy_init(struct dp_ctrl *dp_ctrl)
 void dp_ctrl_phy_exit(struct dp_ctrl *dp_ctrl)
 {
 	struct dp_ctrl_private *ctrl;
-	struct dp_io *dp_io;
 	struct phy *phy;
 
 	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
-	dp_io = &ctrl->parser->io;
-	phy = dp_io->phy;
+	phy = ctrl->phy;
 
 	dp_catalog_ctrl_phy_reset(ctrl->catalog);
 	phy_exit(phy);
@@ -1503,7 +1500,7 @@ static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl)
 static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl)
 {
 	int ret = 0;
-	struct phy *phy = ctrl->parser->io.phy;
+	struct phy *phy = ctrl->phy;
 
 	dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
 	ctrl->phy_opts.dp.lanes = ctrl->link->link_params.num_lanes;
@@ -1534,12 +1531,10 @@ static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl)
 
 static int dp_ctrl_deinitialize_mainlink(struct dp_ctrl_private *ctrl)
 {
-	struct dp_io *dp_io;
 	struct phy *phy;
 	int ret;
 
-	dp_io = &ctrl->parser->io;
-	phy = dp_io->phy;
+	phy = ctrl->phy;
 
 	dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
 
@@ -1972,13 +1967,11 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train)
 int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl)
 {
 	struct dp_ctrl_private *ctrl;
-	struct dp_io *dp_io;
 	struct phy *phy;
 	int ret;
 
 	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
-	dp_io = &ctrl->parser->io;
-	phy = dp_io->phy;
+	phy = ctrl->phy;
 
 	/* set dongle to D3 (ctrl off) mode */
 	dp_link_psm_config(ctrl->link, &ctrl->panel->link_info, true);
@@ -2011,13 +2004,11 @@ int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl)
 int dp_ctrl_off_link(struct dp_ctrl *dp_ctrl)
 {
 	struct dp_ctrl_private *ctrl;
-	struct dp_io *dp_io;
 	struct phy *phy;
 	int ret;
 
 	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
-	dp_io = &ctrl->parser->io;
-	phy = dp_io->phy;
+	phy = ctrl->phy;
 
 	dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
 
@@ -2040,7 +2031,6 @@ int dp_ctrl_off_link(struct dp_ctrl *dp_ctrl)
 int dp_ctrl_off(struct dp_ctrl *dp_ctrl)
 {
 	struct dp_ctrl_private *ctrl;
-	struct dp_io *dp_io;
 	struct phy *phy;
 	int ret = 0;
 
@@ -2048,8 +2038,7 @@ int dp_ctrl_off(struct dp_ctrl *dp_ctrl)
 		return -EINVAL;
 
 	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
-	dp_io = &ctrl->parser->io;
-	phy = dp_io->phy;
+	phy = ctrl->phy;
 
 	dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false);
 
@@ -2242,7 +2231,7 @@ static int dp_ctrl_clk_init(struct dp_ctrl *dp_ctrl)
 struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
 			struct dp_panel *panel,	struct drm_dp_aux *aux,
 			struct dp_catalog *catalog,
-			struct dp_parser *parser)
+			struct phy *phy)
 {
 	struct dp_ctrl_private *ctrl;
 	int ret;
@@ -2276,12 +2265,12 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
 	init_completion(&ctrl->video_comp);
 
 	/* in parameters */
-	ctrl->parser   = parser;
 	ctrl->panel    = panel;
 	ctrl->aux      = aux;
 	ctrl->link     = link;
 	ctrl->catalog  = catalog;
 	ctrl->dev      = dev;
+	ctrl->phy      = phy;
 
 	ret = dp_ctrl_clk_init(&ctrl->dp_ctrl);
 	if (ret) {
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index cc0cd5be9f40..f801774fa8a8 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -34,7 +34,7 @@ void dp_ctrl_handle_sink_request(struct dp_ctrl *dp_ctrl);
 struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
 			struct dp_panel *panel,	struct drm_dp_aux *aux,
 			struct dp_catalog *catalog,
-			struct dp_parser *parser);
+			struct phy *phy);
 
 void dp_ctrl_reset_irq_ctrl(struct dp_ctrl *dp_ctrl, bool enable);
 void dp_ctrl_phy_init(struct dp_ctrl *dp_ctrl);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 19d9ec1ad48d..405cd30c8d7e 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -760,7 +760,8 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 	}
 
 	dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
-			       dp->catalog, dp->parser);
+			       dp->catalog,
+			       dp->parser->io.phy);
 	if (IS_ERR(dp->ctrl)) {
 		rc = PTR_ERR(dp->ctrl);
 		DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
-- 
2.39.2

[PATCH 11/14] drm/msm/dp: move all IO handling to dp_catalog

[Dmitry Baryshkov]

Rather than parsing the I/O addresses from dp_parser and then passing
them via a struct pointer to dp_catalog, handle I/O region parsing in
dp_catalog and drop it from dp_parser.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_catalog.c | 125 +++++++++++++++++++++++-----
 drivers/gpu/drm/msm/dp/dp_catalog.h |   2 +-
 drivers/gpu/drm/msm/dp/dp_display.c |   6 +-
 drivers/gpu/drm/msm/dp/dp_parser.c  |  73 +---------------
 drivers/gpu/drm/msm/dp/dp_parser.h  |  27 +-----
 5 files changed, 115 insertions(+), 118 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 4c6207797c99..541aac2cb246 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -7,6 +7,7 @@
 
 #include <linux/delay.h>
 #include <linux/iopoll.h>
+#include <linux/platform_device.h>
 #include <linux/rational.h>
 #include <drm/display/drm_dp_helper.h>
 #include <drm/drm_print.h>
@@ -53,10 +54,31 @@
 	(PSR_UPDATE_MASK | PSR_CAPTURE_MASK | PSR_EXIT_MASK | \
 	PSR_UPDATE_ERROR_MASK | PSR_WAKE_ERROR_MASK)
 
+#define DP_DEFAULT_AHB_OFFSET	0x0000
+#define DP_DEFAULT_AHB_SIZE	0x0200
+#define DP_DEFAULT_AUX_OFFSET	0x0200
+#define DP_DEFAULT_AUX_SIZE	0x0200
+#define DP_DEFAULT_LINK_OFFSET	0x0400
+#define DP_DEFAULT_LINK_SIZE	0x0C00
+#define DP_DEFAULT_P0_OFFSET	0x1000
+#define DP_DEFAULT_P0_SIZE	0x0400
+
+struct dss_io_region {
+	size_t len;
+	void __iomem *base;
+};
+
+struct dss_io_data {
+	struct dss_io_region ahb;
+	struct dss_io_region aux;
+	struct dss_io_region link;
+	struct dss_io_region p0;
+};
+
 struct dp_catalog_private {
 	struct device *dev;
 	struct drm_device *drm_dev;
-	struct dp_io *io;
+	struct dss_io_data io;
 	u32 (*audio_map)[DP_AUDIO_SDP_HEADER_MAX];
 	struct dp_catalog dp_catalog;
 	u8 aux_lut_cfg_index[PHY_AUX_CFG_MAX];
@@ -66,7 +88,7 @@ void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *d
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 			struct dp_catalog_private, dp_catalog);
-	struct dss_io_data *dss = &catalog->io->dp_controller;
+	struct dss_io_data *dss = &catalog->io;
 
 	msm_disp_snapshot_add_block(disp_state, dss->ahb.len, dss->ahb.base, "dp_ahb");
 	msm_disp_snapshot_add_block(disp_state, dss->aux.len, dss->aux.base, "dp_aux");
@@ -76,7 +98,7 @@ void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *d
 
 static inline u32 dp_read_aux(struct dp_catalog_private *catalog, u32 offset)
 {
-	return readl_relaxed(catalog->io->dp_controller.aux.base + offset);
+	return readl_relaxed(catalog->io.aux.base + offset);
 }
 
 static inline void dp_write_aux(struct dp_catalog_private *catalog,
@@ -86,12 +108,12 @@ static inline void dp_write_aux(struct dp_catalog_private *catalog,
 	 * To make sure aux reg writes happens before any other operation,
 	 * this function uses writel() instread of writel_relaxed()
 	 */
-	writel(data, catalog->io->dp_controller.aux.base + offset);
+	writel(data, catalog->io.aux.base + offset);
 }
 
 static inline u32 dp_read_ahb(const struct dp_catalog_private *catalog, u32 offset)
 {
-	return readl_relaxed(catalog->io->dp_controller.ahb.base + offset);
+	return readl_relaxed(catalog->io.ahb.base + offset);
 }
 
 static inline void dp_write_ahb(struct dp_catalog_private *catalog,
@@ -101,7 +123,7 @@ static inline void dp_write_ahb(struct dp_catalog_private *catalog,
 	 * To make sure phy reg writes happens before any other operation,
 	 * this function uses writel() instread of writel_relaxed()
 	 */
-	writel(data, catalog->io->dp_controller.ahb.base + offset);
+	writel(data, catalog->io.ahb.base + offset);
 }
 
 static inline void dp_write_p0(struct dp_catalog_private *catalog,
@@ -111,7 +133,7 @@ static inline void dp_write_p0(struct dp_catalog_private *catalog,
 	 * To make sure interface reg writes happens before any other operation,
 	 * this function uses writel() instread of writel_relaxed()
 	 */
-	writel(data, catalog->io->dp_controller.p0.base + offset);
+	writel(data, catalog->io.p0.base + offset);
 }
 
 static inline u32 dp_read_p0(struct dp_catalog_private *catalog,
@@ -121,12 +143,12 @@ static inline u32 dp_read_p0(struct dp_catalog_private *catalog,
 	 * To make sure interface reg writes happens before any other operation,
 	 * this function uses writel() instread of writel_relaxed()
 	 */
-	return readl_relaxed(catalog->io->dp_controller.p0.base + offset);
+	return readl_relaxed(catalog->io.p0.base + offset);
 }
 
 static inline u32 dp_read_link(struct dp_catalog_private *catalog, u32 offset)
 {
-	return readl_relaxed(catalog->io->dp_controller.link.base + offset);
+	return readl_relaxed(catalog->io.link.base + offset);
 }
 
 static inline void dp_write_link(struct dp_catalog_private *catalog,
@@ -136,7 +158,7 @@ static inline void dp_write_link(struct dp_catalog_private *catalog,
 	 * To make sure link reg writes happens before any other operation,
 	 * this function uses writel() instread of writel_relaxed()
 	 */
-	writel(data, catalog->io->dp_controller.link.base + offset);
+	writel(data, catalog->io.link.base + offset);
 }
 
 /* aux related catalog functions */
@@ -248,7 +270,7 @@ int dp_catalog_aux_wait_for_hpd_connect_state(struct dp_catalog *dp_catalog)
 				struct dp_catalog_private, dp_catalog);
 
 	/* poll for hpd connected status every 2ms and timeout after 500ms */
-	return readl_poll_timeout(catalog->io->dp_controller.aux.base +
+	return readl_poll_timeout(catalog->io.aux.base +
 				REG_DP_DP_HPD_INT_STATUS,
 				state, state & DP_DP_HPD_STATE_STATUS_CONNECTED,
 				2000, 500000);
@@ -276,7 +298,7 @@ void dp_catalog_dump_regs(struct dp_catalog *dp_catalog)
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 		struct dp_catalog_private, dp_catalog);
-	struct dss_io_data *io = &catalog->io->dp_controller;
+	struct dss_io_data *io = &catalog->io;
 
 	pr_info("AHB regs\n");
 	dump_regs(io->ahb.base, io->ahb.len);
@@ -500,7 +522,7 @@ int dp_catalog_ctrl_set_pattern_state_bit(struct dp_catalog *dp_catalog,
 	bit = BIT(state_bit - 1) << DP_MAINLINK_READY_LINK_TRAINING_SHIFT;
 
 	/* Poll for mainlink ready status */
-	ret = readx_poll_timeout(readl, catalog->io->dp_controller.link.base +
+	ret = readx_poll_timeout(readl, catalog->io.link.base +
 					REG_DP_MAINLINK_READY,
 					data, data & bit,
 					POLLING_SLEEP_US, POLLING_TIMEOUT_US);
@@ -563,7 +585,7 @@ bool dp_catalog_ctrl_mainlink_ready(struct dp_catalog *dp_catalog)
 				struct dp_catalog_private, dp_catalog);
 
 	/* Poll for mainlink ready status */
-	ret = readl_poll_timeout(catalog->io->dp_controller.link.base +
+	ret = readl_poll_timeout(catalog->io.link.base +
 				REG_DP_MAINLINK_READY,
 				data, data & DP_MAINLINK_READY_FOR_VIDEO,
 				POLLING_SLEEP_US, POLLING_TIMEOUT_US);
@@ -945,21 +967,84 @@ void dp_catalog_panel_tpg_disable(struct dp_catalog *dp_catalog)
 	dp_write_p0(catalog, MMSS_DP_TIMING_ENGINE_EN, 0x0);
 }
 
-struct dp_catalog *dp_catalog_get(struct device *dev, struct dp_io *io)
+static void __iomem *dp_ioremap(struct platform_device *pdev, int idx, size_t *len)
 {
-	struct dp_catalog_private *catalog;
+	struct resource *res;
+	void __iomem *base;
+
+	base = devm_platform_get_and_ioremap_resource(pdev, idx, &res);
+	if (!IS_ERR(base))
+		*len = resource_size(res);
+
+	return base;
+}
+
+static int dp_catalog_get_io(struct dp_catalog_private *catalog)
+{
+	struct platform_device *pdev = to_platform_device(catalog->dev);
+	struct dss_io_data *dss = &catalog->io;
+
+	dss->ahb.base = dp_ioremap(pdev, 0, &dss->ahb.len);
+	if (IS_ERR(dss->ahb.base))
+		return PTR_ERR(dss->ahb.base);
 
-	if (!io) {
-		DRM_ERROR("invalid input\n");
-		return ERR_PTR(-EINVAL);
+	dss->aux.base = dp_ioremap(pdev, 1, &dss->aux.len);
+	if (IS_ERR(dss->aux.base)) {
+		/*
+		 * The initial binding had a single reg, but in order to
+		 * support variation in the sub-region sizes this was split.
+		 * dp_ioremap() will fail with -EINVAL here if only a single
+		 * reg is specified, so fill in the sub-region offsets and
+		 * lengths based on this single region.
+		 */
+		if (PTR_ERR(dss->aux.base) == -EINVAL) {
+			if (dss->ahb.len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) {
+				DRM_ERROR("legacy memory region not large enough\n");
+				return -EINVAL;
+			}
+
+			dss->ahb.len = DP_DEFAULT_AHB_SIZE;
+			dss->aux.base = dss->ahb.base + DP_DEFAULT_AUX_OFFSET;
+			dss->aux.len = DP_DEFAULT_AUX_SIZE;
+			dss->link.base = dss->ahb.base + DP_DEFAULT_LINK_OFFSET;
+			dss->link.len = DP_DEFAULT_LINK_SIZE;
+			dss->p0.base = dss->ahb.base + DP_DEFAULT_P0_OFFSET;
+			dss->p0.len = DP_DEFAULT_P0_SIZE;
+		} else {
+			DRM_ERROR("unable to remap aux region: %pe\n", dss->aux.base);
+			return PTR_ERR(dss->aux.base);
+		}
+	} else {
+		dss->link.base = dp_ioremap(pdev, 2, &dss->link.len);
+		if (IS_ERR(dss->link.base)) {
+			DRM_ERROR("unable to remap link region: %pe\n", dss->link.base);
+			return PTR_ERR(dss->link.base);
+		}
+
+		dss->p0.base = dp_ioremap(pdev, 3, &dss->p0.len);
+		if (IS_ERR(dss->p0.base)) {
+			DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0.base);
+			return PTR_ERR(dss->p0.base);
+		}
 	}
 
+	return 0;
+}
+
+struct dp_catalog *dp_catalog_get(struct device *dev)
+{
+	struct dp_catalog_private *catalog;
+	int ret;
+
 	catalog  = devm_kzalloc(dev, sizeof(*catalog), GFP_KERNEL);
 	if (!catalog)
 		return ERR_PTR(-ENOMEM);
 
 	catalog->dev = dev;
-	catalog->io = io;
+
+	ret = dp_catalog_get_io(catalog);
+	if (ret)
+		return ERR_PTR(ret);
 
 	return &catalog->dp_catalog;
 }
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 1f3f58d4b8de..989e4c4fd6fa 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -126,7 +126,7 @@ void dp_catalog_panel_tpg_enable(struct dp_catalog *dp_catalog,
 				struct drm_display_mode *drm_mode);
 void dp_catalog_panel_tpg_disable(struct dp_catalog *dp_catalog);
 
-struct dp_catalog *dp_catalog_get(struct device *dev, struct dp_io *io);
+struct dp_catalog *dp_catalog_get(struct device *dev);
 
 /* DP Audio APIs */
 void dp_catalog_audio_get_header(struct dp_catalog *catalog);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 405cd30c8d7e..9e0217a9ec07 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -721,7 +721,7 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 		goto error;
 	}
 
-	dp->catalog = dp_catalog_get(dev, &dp->parser->io);
+	dp->catalog = dp_catalog_get(dev);
 	if (IS_ERR(dp->catalog)) {
 		rc = PTR_ERR(dp->catalog);
 		DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
@@ -730,7 +730,7 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 	}
 
 	dp->aux = dp_aux_get(dev, dp->catalog,
-			     dp->parser->io.phy,
+			     dp->parser->phy,
 			     dp->dp_display.is_edp);
 	if (IS_ERR(dp->aux)) {
 		rc = PTR_ERR(dp->aux);
@@ -761,7 +761,7 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 
 	dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 			       dp->catalog,
-			       dp->parser->io.phy);
+			       dp->parser->phy);
 	if (IS_ERR(dp->ctrl)) {
 		rc = PTR_ERR(dp->ctrl);
 		DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index de7cfc340f0c..2d0dd4353cdf 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -13,80 +13,13 @@
 #include "dp_parser.h"
 #include "dp_reg.h"
 
-#define DP_DEFAULT_AHB_OFFSET	0x0000
-#define DP_DEFAULT_AHB_SIZE	0x0200
-#define DP_DEFAULT_AUX_OFFSET	0x0200
-#define DP_DEFAULT_AUX_SIZE	0x0200
-#define DP_DEFAULT_LINK_OFFSET	0x0400
-#define DP_DEFAULT_LINK_SIZE	0x0C00
-#define DP_DEFAULT_P0_OFFSET	0x1000
-#define DP_DEFAULT_P0_SIZE	0x0400
-
-static void __iomem *dp_ioremap(struct platform_device *pdev, int idx, size_t *len)
-{
-	struct resource *res;
-	void __iomem *base;
-
-	base = devm_platform_get_and_ioremap_resource(pdev, idx, &res);
-	if (!IS_ERR(base))
-		*len = resource_size(res);
-
-	return base;
-}
-
 static int dp_parser_ctrl_res(struct dp_parser *parser)
 {
 	struct platform_device *pdev = parser->pdev;
-	struct dp_io *io = &parser->io;
-	struct dss_io_data *dss = &io->dp_controller;
-
-	dss->ahb.base = dp_ioremap(pdev, 0, &dss->ahb.len);
-	if (IS_ERR(dss->ahb.base))
-		return PTR_ERR(dss->ahb.base);
-
-	dss->aux.base = dp_ioremap(pdev, 1, &dss->aux.len);
-	if (IS_ERR(dss->aux.base)) {
-		/*
-		 * The initial binding had a single reg, but in order to
-		 * support variation in the sub-region sizes this was split.
-		 * dp_ioremap() will fail with -EINVAL here if only a single
-		 * reg is specified, so fill in the sub-region offsets and
-		 * lengths based on this single region.
-		 */
-		if (PTR_ERR(dss->aux.base) == -EINVAL) {
-			if (dss->ahb.len < DP_DEFAULT_P0_OFFSET + DP_DEFAULT_P0_SIZE) {
-				DRM_ERROR("legacy memory region not large enough\n");
-				return -EINVAL;
-			}
-
-			dss->ahb.len = DP_DEFAULT_AHB_SIZE;
-			dss->aux.base = dss->ahb.base + DP_DEFAULT_AUX_OFFSET;
-			dss->aux.len = DP_DEFAULT_AUX_SIZE;
-			dss->link.base = dss->ahb.base + DP_DEFAULT_LINK_OFFSET;
-			dss->link.len = DP_DEFAULT_LINK_SIZE;
-			dss->p0.base = dss->ahb.base + DP_DEFAULT_P0_OFFSET;
-			dss->p0.len = DP_DEFAULT_P0_SIZE;
-		} else {
-			DRM_ERROR("unable to remap aux region: %pe\n", dss->aux.base);
-			return PTR_ERR(dss->aux.base);
-		}
-	} else {
-		dss->link.base = dp_ioremap(pdev, 2, &dss->link.len);
-		if (IS_ERR(dss->link.base)) {
-			DRM_ERROR("unable to remap link region: %pe\n", dss->link.base);
-			return PTR_ERR(dss->link.base);
-		}
-
-		dss->p0.base = dp_ioremap(pdev, 3, &dss->p0.len);
-		if (IS_ERR(dss->p0.base)) {
-			DRM_ERROR("unable to remap p0 region: %pe\n", dss->p0.base);
-			return PTR_ERR(dss->p0.base);
-		}
-	}
 
-	io->phy = devm_phy_get(&pdev->dev, "dp");
-	if (IS_ERR(io->phy))
-		return PTR_ERR(io->phy);
+	parser->phy = devm_phy_get(&pdev->dev, "dp");
+	if (IS_ERR(parser->phy))
+		return PTR_ERR(parser->phy);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index b28052e87101..1e2ca4efb029 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -14,37 +14,16 @@
 #define DP_MAX_NUM_DP_LANES	4
 #define DP_LINK_RATE_HBR2	540000 /* kbytes */
 
-struct dss_io_region {
-	size_t len;
-	void __iomem *base;
-};
-
-struct dss_io_data {
-	struct dss_io_region ahb;
-	struct dss_io_region aux;
-	struct dss_io_region link;
-	struct dss_io_region p0;
-};
-
-/**
- * struct dp_ctrl_resource - controller's IO related data
- *
- * @dp_controller: Display Port controller mapped memory address
- * @phy_io: phy's mapped memory address
- */
-struct dp_io {
-	struct dss_io_data dp_controller;
-	struct phy *phy;
-};
-
 /**
  * struct dp_parser - DP parser's data exposed to clients
  *
  * @pdev: platform data of the client
+ * @io: Display Port controller mapped memory address
+ * @phy: PHY handle
  */
 struct dp_parser {
 	struct platform_device *pdev;
-	struct dp_io io;
+	struct phy *phy;
 	u32 max_dp_lanes;
 	u32 max_dp_link_rate;
 	struct drm_bridge *next_bridge;
-- 
2.39.2

[PATCH 12/14] drm/msm/dp: move link property handling to dp_panel

[Dmitry Baryshkov]

Instead of passing link properties through the separate struct, parse
them directly in the dp_panel.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c |  8 ----
 drivers/gpu/drm/msm/dp/dp_display.h |  1 -
 drivers/gpu/drm/msm/dp/dp_panel.c   | 63 +++++++++++++++++++++++++++++
 drivers/gpu/drm/msm/dp/dp_parser.c  | 54 -------------------------
 drivers/gpu/drm/msm/dp/dp_parser.h  |  4 --
 5 files changed, 63 insertions(+), 67 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 9e0217a9ec07..4de0857c31ce 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -356,12 +356,6 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp)
 	int rc = 0;
 	struct edid *edid;
 
-	dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
-	dp->panel->max_dp_link_rate = dp->parser->max_dp_link_rate;
-
-	drm_dbg_dp(dp->drm_dev, "max_lanes=%d max_link_rate=%d\n",
-		dp->panel->max_dp_lanes, dp->panel->max_dp_link_rate);
-
 	rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
 	if (rc)
 		goto end;
@@ -381,8 +375,6 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp)
 	dp->audio_supported = drm_detect_monitor_audio(edid);
 	dp_panel_handle_sink_request(dp->panel);
 
-	dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
-
 	/*
 	 * set sink to normal operation mode -- D0
 	 * before dpcd read
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 102f3507d824..70759dd1bfd0 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -28,7 +28,6 @@ struct msm_dp {
 
 	bool wide_bus_en;
 
-	u32 max_dp_lanes;
 	struct dp_audio *dp_audio;
 	bool psr_supported;
 };
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
index 127f6af995cd..8ef55cc4aa48 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.c
+++ b/drivers/gpu/drm/msm/dp/dp_panel.c
@@ -7,8 +7,12 @@
 
 #include <drm/drm_connector.h>
 #include <drm/drm_edid.h>
+#include <drm/drm_of.h>
 #include <drm/drm_print.h>
 
+#define DP_MAX_NUM_DP_LANES	4
+#define DP_LINK_RATE_HBR2	540000 /* kbytes */
+
 struct dp_panel_private {
 	struct device *dev;
 	struct drm_device *drm_dev;
@@ -138,6 +142,9 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel,
 
 	panel = container_of(dp_panel, struct dp_panel_private, dp_panel);
 
+	drm_dbg_dp(panel->drm_dev, "max_lanes=%d max_link_rate=%d\n",
+		dp_panel->max_dp_lanes, dp_panel->max_dp_link_rate);
+
 	rc = dp_panel_read_dpcd(dp_panel);
 	if (rc) {
 		DRM_ERROR("read dpcd failed %d\n", rc);
@@ -386,10 +393,62 @@ int dp_panel_init_panel_info(struct dp_panel *dp_panel)
 	return 0;
 }
 
+static u32 dp_panel_link_frequencies(struct device_node *of_node)
+{
+	struct device_node *endpoint;
+	u64 frequency = 0;
+	int cnt;
+
+	endpoint = of_graph_get_endpoint_by_regs(of_node, 1, 0); /* port@1 */
+	if (!endpoint)
+		return 0;
+
+	cnt = of_property_count_u64_elems(endpoint, "link-frequencies");
+
+	if (cnt > 0)
+		of_property_read_u64_index(endpoint, "link-frequencies",
+						cnt - 1, &frequency);
+	of_node_put(endpoint);
+
+	do_div(frequency,
+		10 * /* from symbol rate to link rate */
+		1000); /* kbytes */
+
+	return frequency;
+}
+
+static int dp_panel_parse_dt(struct dp_panel *dp_panel)
+{
+	struct dp_panel_private *panel = container_of(dp_panel, struct dp_panel_private, dp_panel);
+	struct device_node *of_node = panel->dev->of_node;
+	int cnt;
+
+	/*
+	 * data-lanes is the property of dp_out endpoint
+	 */
+	cnt = drm_of_get_data_lanes_count_ep(of_node, 1, 0, 1, DP_MAX_NUM_DP_LANES);
+	if (cnt < 0) {
+		/* legacy code, data-lanes is the property of mdss_dp node */
+		cnt = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES);
+	}
+
+	if (cnt > 0)
+		dp_panel->max_dp_lanes = cnt;
+	else
+		dp_panel->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */
+
+	dp_panel->max_dp_link_rate = dp_panel_link_frequencies(of_node);
+	if (!dp_panel->max_dp_link_rate)
+		dp_panel->max_dp_link_rate = DP_LINK_RATE_HBR2;
+
+	return 0;
+}
+
 struct dp_panel *dp_panel_get(struct dp_panel_in *in)
 {
 	struct dp_panel_private *panel;
 	struct dp_panel *dp_panel;
+	int ret;
 
 	if (!in->dev || !in->catalog || !in->aux || !in->link) {
 		DRM_ERROR("invalid input\n");
@@ -408,6 +467,10 @@ struct dp_panel *dp_panel_get(struct dp_panel_in *in)
 	dp_panel = &panel->dp_panel;
 	dp_panel->max_bw_code = DP_LINK_BW_8_1;
 
+	ret = dp_panel_parse_dt(dp_panel);
+	if (ret)
+		return ERR_PTR(ret);
+
 	return dp_panel;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index 2d0dd4353cdf..aa135d5cedbd 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -24,56 +24,6 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
 	return 0;
 }
 
-static u32 dp_parser_link_frequencies(struct device_node *of_node)
-{
-	struct device_node *endpoint;
-	u64 frequency = 0;
-	int cnt;
-
-	endpoint = of_graph_get_endpoint_by_regs(of_node, 1, 0); /* port@1 */
-	if (!endpoint)
-		return 0;
-
-	cnt = of_property_count_u64_elems(endpoint, "link-frequencies");
-
-	if (cnt > 0)
-		of_property_read_u64_index(endpoint, "link-frequencies",
-						cnt - 1, &frequency);
-	of_node_put(endpoint);
-
-	do_div(frequency,
-		10 * /* from symbol rate to link rate */
-		1000); /* kbytes */
-
-	return frequency;
-}
-
-static int dp_parser_misc(struct dp_parser *parser)
-{
-	struct device_node *of_node = parser->pdev->dev.of_node;
-	int cnt;
-
-	/*
-	 * data-lanes is the property of dp_out endpoint
-	 */
-	cnt = drm_of_get_data_lanes_count_ep(of_node, 1, 0, 1, DP_MAX_NUM_DP_LANES);
-	if (cnt < 0) {
-		/* legacy code, data-lanes is the property of mdss_dp node */
-		cnt = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES);
-	}
-
-	if (cnt > 0)
-		parser->max_dp_lanes = cnt;
-	else
-		parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */
-
-	parser->max_dp_link_rate = dp_parser_link_frequencies(of_node);
-	if (!parser->max_dp_link_rate)
-		parser->max_dp_link_rate = DP_LINK_RATE_HBR2;
-
-	return 0;
-}
-
 int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser)
 {
 	struct platform_device *pdev = parser->pdev;
@@ -101,10 +51,6 @@ static int dp_parser_parse(struct dp_parser *parser)
 	if (rc)
 		return rc;
 
-	rc = dp_parser_misc(parser);
-	if (rc)
-		return rc;
-
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 1e2ca4efb029..bc56e0e8c446 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -11,8 +11,6 @@
 #include "msm_drv.h"
 
 #define DP_MAX_PIXEL_CLK_KHZ	675000
-#define DP_MAX_NUM_DP_LANES	4
-#define DP_LINK_RATE_HBR2	540000 /* kbytes */
 
 /**
  * struct dp_parser - DP parser's data exposed to clients
@@ -24,8 +22,6 @@
 struct dp_parser {
 	struct platform_device *pdev;
 	struct phy *phy;
-	u32 max_dp_lanes;
-	u32 max_dp_link_rate;
 	struct drm_bridge *next_bridge;
 };
 
-- 
2.39.2

[PATCH 13/14] drm/msm/dp: move next_bridge handling to dp_display

[Dmitry Baryshkov]

Remove two levels of indirection and fetch next bridge directly in
dp_display_probe_tail().

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/dp/dp_display.c | 42 +++++++++--------------------
 drivers/gpu/drm/msm/dp/dp_parser.c  | 14 ----------
 drivers/gpu/drm/msm/dp/dp_parser.h  | 14 ----------
 3 files changed, 13 insertions(+), 57 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 4de0857c31ce..923df47efcc9 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -1195,16 +1195,24 @@ static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pde
 	return NULL;
 }
 
-static int dp_display_get_next_bridge(struct msm_dp *dp);
-
 static int dp_display_probe_tail(struct device *dev)
 {
 	struct msm_dp *dp = dev_get_drvdata(dev);
 	int ret;
 
-	ret = dp_display_get_next_bridge(dp);
-	if (ret)
-		return ret;
+	/*
+	 * External bridges are mandatory for eDP interfaces: one has to
+	 * provide at least an eDP panel (which gets wrapped into panel-bridge).
+	 *
+	 * For DisplayPort interfaces external bridges are optional, so
+	 * silently ignore an error if one is not present (-ENODEV).
+	 */
+	dp->next_bridge = devm_drm_of_get_bridge(&dp->pdev->dev, dp->pdev->dev.of_node, 1, 0);
+	if (IS_ERR(dp->next_bridge)) {
+		ret = PTR_ERR(dp->next_bridge);
+		if (dp->is_edp || ret != -ENODEV)
+			return ret;
+	}
 
 	ret = component_add(dev, &dp_display_comp_ops);
 	if (ret)
@@ -1397,30 +1405,6 @@ void dp_display_debugfs_init(struct msm_dp *dp_display, struct dentry *root, boo
 	}
 }
 
-static int dp_display_get_next_bridge(struct msm_dp *dp)
-{
-	int rc;
-	struct dp_display_private *dp_priv;
-
-	dp_priv = container_of(dp, struct dp_display_private, dp_display);
-
-	/*
-	 * External bridges are mandatory for eDP interfaces: one has to
-	 * provide at least an eDP panel (which gets wrapped into panel-bridge).
-	 *
-	 * For DisplayPort interfaces external bridges are optional, so
-	 * silently ignore an error if one is not present (-ENODEV).
-	 */
-	rc = devm_dp_parser_find_next_bridge(&dp->pdev->dev, dp_priv->parser);
-	if (!dp->is_edp && rc == -ENODEV)
-		return 0;
-
-	if (!rc)
-		dp->next_bridge = dp_priv->parser->next_bridge;
-
-	return rc;
-}
-
 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
 			struct drm_encoder *encoder)
 {
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index aa135d5cedbd..f95ab3c5c72c 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -24,20 +24,6 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
 	return 0;
 }
 
-int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser)
-{
-	struct platform_device *pdev = parser->pdev;
-	struct drm_bridge *bridge;
-
-	bridge = devm_drm_of_get_bridge(dev, pdev->dev.of_node, 1, 0);
-	if (IS_ERR(bridge))
-		return PTR_ERR(bridge);
-
-	parser->next_bridge = bridge;
-
-	return 0;
-}
-
 static int dp_parser_parse(struct dp_parser *parser)
 {
 	int rc = 0;
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index bc56e0e8c446..2b39b1c394ae 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -22,7 +22,6 @@
 struct dp_parser {
 	struct platform_device *pdev;
 	struct phy *phy;
-	struct drm_bridge *next_bridge;
 };
 
 /**
@@ -38,17 +37,4 @@ struct dp_parser {
  */
 struct dp_parser *dp_parser_get(struct platform_device *pdev);
 
-/**
- * devm_dp_parser_find_next_bridge() - find an additional bridge to DP
- *
- * @dev: device to tie bridge lifetime to
- * @parser: dp_parser data from client
- *
- * This function is used to find any additional bridge attached to
- * the DP controller. The eDP interface requires a panel bridge.
- *
- * Return: 0 if able to get the bridge, otherwise negative errno for failure.
- */
-int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser);
-
 #endif
-- 
2.39.2

[PATCH 14/14] drm/msm/dp: drop dp_parser

[Dmitry Baryshkov]

Finally drop separate "parsing" submodule. There is no need in it
anymore. All submodules handle DT properties directly rather than
passing them via the separate structure pointer.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/Makefile        |  1 -
 drivers/gpu/drm/msm/dp/dp_aux.h     |  1 +
 drivers/gpu/drm/msm/dp/dp_catalog.h |  1 -
 drivers/gpu/drm/msm/dp/dp_ctrl.h    |  3 +-
 drivers/gpu/drm/msm/dp/dp_debug.c   |  1 -
 drivers/gpu/drm/msm/dp/dp_display.c | 18 ++++-----
 drivers/gpu/drm/msm/dp/dp_display.h |  2 +
 drivers/gpu/drm/msm/dp/dp_parser.c  | 61 -----------------------------
 drivers/gpu/drm/msm/dp/dp_parser.h  | 40 -------------------
 9 files changed, 12 insertions(+), 116 deletions(-)
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_parser.c
 delete mode 100644 drivers/gpu/drm/msm/dp/dp_parser.h

diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 8dbdf3fba69e..543e04fa72e3 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -127,7 +127,6 @@ msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \
 	dp/dp_drm.o \
 	dp/dp_link.o \
 	dp/dp_panel.o \
-	dp/dp_parser.o \
 	dp/dp_audio.o
 
 msm-$(CONFIG_DRM_FBDEV_EMULATION) += msm_fbdev.o
diff --git a/drivers/gpu/drm/msm/dp/dp_aux.h b/drivers/gpu/drm/msm/dp/dp_aux.h
index 16d9b1758748..f47d591c1f54 100644
--- a/drivers/gpu/drm/msm/dp/dp_aux.h
+++ b/drivers/gpu/drm/msm/dp/dp_aux.h
@@ -16,6 +16,7 @@ void dp_aux_init(struct drm_dp_aux *dp_aux);
 void dp_aux_deinit(struct drm_dp_aux *dp_aux);
 void dp_aux_reconfig(struct drm_dp_aux *dp_aux);
 
+struct phy;
 struct drm_dp_aux *dp_aux_get(struct device *dev, struct dp_catalog *catalog,
 			      struct phy *phy,
 			      bool is_edp);
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 989e4c4fd6fa..a724a986b6ee 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -8,7 +8,6 @@
 
 #include <drm/drm_modes.h>
 
-#include "dp_parser.h"
 #include "disp/msm_disp_snapshot.h"
 
 /* interrupts */
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index f801774fa8a8..4e3795409cd8 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -9,7 +9,6 @@
 #include "dp_aux.h"
 #include "dp_panel.h"
 #include "dp_link.h"
-#include "dp_parser.h"
 #include "dp_catalog.h"
 
 struct dp_ctrl {
@@ -23,6 +22,8 @@ enum dp_pm_type {
 	DP_MAX_PM
 };
 
+struct phy;
+
 int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl);
 int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train);
 int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl);
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c
index 6c281dc095b9..ac68554801a4 100644
--- a/drivers/gpu/drm/msm/dp/dp_debug.c
+++ b/drivers/gpu/drm/msm/dp/dp_debug.c
@@ -9,7 +9,6 @@
 #include <drm/drm_connector.h>
 #include <drm/drm_file.h>
 
-#include "dp_parser.h"
 #include "dp_catalog.h"
 #include "dp_aux.h"
 #include "dp_ctrl.h"
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 923df47efcc9..58b93dc2bc7a 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -9,12 +9,12 @@
 #include <linux/debugfs.h>
 #include <linux/component.h>
 #include <linux/of_irq.h>
+#include <linux/phy/phy.h>
 #include <linux/delay.h>
 #include <drm/display/drm_dp_aux_bus.h>
 
 #include "msm_drv.h"
 #include "msm_kms.h"
-#include "dp_parser.h"
 #include "dp_ctrl.h"
 #include "dp_catalog.h"
 #include "dp_aux.h"
@@ -87,7 +87,6 @@ struct dp_display_private {
 	struct drm_device *drm_dev;
 	struct dentry *root;
 
-	struct dp_parser  *parser;
 	struct dp_catalog *catalog;
 	struct drm_dp_aux *aux;
 	struct dp_link    *link;
@@ -704,14 +703,11 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 	struct dp_panel_in panel_in = {
 		.dev = dev,
 	};
+	struct phy *phy;
 
-	dp->parser = dp_parser_get(dp->dp_display.pdev);
-	if (IS_ERR(dp->parser)) {
-		rc = PTR_ERR(dp->parser);
-		DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
-		dp->parser = NULL;
-		goto error;
-	}
+	phy = devm_phy_get(dev, "dp");
+	if (IS_ERR(phy))
+		return PTR_ERR(phy);
 
 	dp->catalog = dp_catalog_get(dev);
 	if (IS_ERR(dp->catalog)) {
@@ -722,7 +718,7 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 	}
 
 	dp->aux = dp_aux_get(dev, dp->catalog,
-			     dp->parser->phy,
+			     phy,
 			     dp->dp_display.is_edp);
 	if (IS_ERR(dp->aux)) {
 		rc = PTR_ERR(dp->aux);
@@ -753,7 +749,7 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
 
 	dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
 			       dp->catalog,
-			       dp->parser->phy);
+			       phy);
 	if (IS_ERR(dp->ctrl)) {
 		rc = PTR_ERR(dp->ctrl);
 		DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 70759dd1bfd0..234dada88687 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -10,6 +10,8 @@
 #include <sound/hdmi-codec.h>
 #include "disp/msm_disp_snapshot.h"
 
+#define DP_MAX_PIXEL_CLK_KHZ	675000
+
 struct msm_dp {
 	struct drm_device *drm_dev;
 	struct platform_device *pdev;
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
deleted file mode 100644
index f95ab3c5c72c..000000000000
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ /dev/null
@@ -1,61 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
- */
-
-#include <linux/of_gpio.h>
-#include <linux/phy/phy.h>
-
-#include <drm/drm_of.h>
-#include <drm/drm_print.h>
-#include <drm/drm_bridge.h>
-
-#include "dp_parser.h"
-#include "dp_reg.h"
-
-static int dp_parser_ctrl_res(struct dp_parser *parser)
-{
-	struct platform_device *pdev = parser->pdev;
-
-	parser->phy = devm_phy_get(&pdev->dev, "dp");
-	if (IS_ERR(parser->phy))
-		return PTR_ERR(parser->phy);
-
-	return 0;
-}
-
-static int dp_parser_parse(struct dp_parser *parser)
-{
-	int rc = 0;
-
-	if (!parser) {
-		DRM_ERROR("invalid input\n");
-		return -EINVAL;
-	}
-
-	rc = dp_parser_ctrl_res(parser);
-	if (rc)
-		return rc;
-
-	return 0;
-}
-
-struct dp_parser *dp_parser_get(struct platform_device *pdev)
-{
-	struct dp_parser *parser;
-	int ret;
-
-	parser = devm_kzalloc(&pdev->dev, sizeof(*parser), GFP_KERNEL);
-	if (!parser)
-		return ERR_PTR(-ENOMEM);
-
-	parser->pdev = pdev;
-
-	ret = dp_parser_parse(parser);
-	if (ret) {
-		dev_err(&pdev->dev, "device tree parsing failed\n");
-		return ERR_PTR(ret);
-	}
-
-	return parser;
-}
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
deleted file mode 100644
index 2b39b1c394ae..000000000000
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
- */
-
-#ifndef _DP_PARSER_H_
-#define _DP_PARSER_H_
-
-#include <linux/platform_device.h>
-
-#include "msm_drv.h"
-
-#define DP_MAX_PIXEL_CLK_KHZ	675000
-
-/**
- * struct dp_parser - DP parser's data exposed to clients
- *
- * @pdev: platform data of the client
- * @io: Display Port controller mapped memory address
- * @phy: PHY handle
- */
-struct dp_parser {
-	struct platform_device *pdev;
-	struct phy *phy;
-};
-
-/**
- * dp_parser_get() - get the DP's device tree parser module
- *
- * @pdev: platform data of the client
- * return: pointer to dp_parser structure.
- *
- * This function provides client capability to parse the
- * device tree and populate the data structures. The data
- * related to clock, regulators, pin-control and other
- * can be parsed using this module.
- */
-struct dp_parser *dp_parser_get(struct platform_device *pdev);
-
-#endif
-- 
2.39.2

Re: [PATCH 02/14] drm/msm/dp: drop unused fields from dp_power_private

[Konrad Dybcio]

On 29.12.2023 23:56, Dmitry Baryshkov wrote:
> Drop unused and obsolete fields from struct dp_power_private.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad

Re: [PATCH 03/14] drm/msm/dp: parse DT from dp_parser_get

[Konrad Dybcio]

On 29.12.2023 23:56, Dmitry Baryshkov wrote:
> It makes little sense to split the submodule get and actual DT parsing.
> Call dp_parser_parse() directly from dp_parser_get(), so that the parser
> data is fully initialised once it is returned to the caller.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad

Re: [PATCH 04/14] drm/msm/dp: inline dp_power_(de)init

[Konrad Dybcio]

On 29.12.2023 23:56, Dmitry Baryshkov wrote:
> In preparation to cleanup of the dp_power module, inline dp_power_init()
> and dp_power_deinit() functions, which are now just turning the clocks
> on and off.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
Oh wow, talk about sugar (salt?) syntax :P

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>

Konrad

Re: [PATCH 05/14] drm/msm/dp: fold dp_power into dp_ctrl module

[Konrad Dybcio]

On 29.12.2023 23:56, Dmitry Baryshkov wrote:
> The dp_power submodule is limited to handling the clocks only following
> previous cleanups. Fold it into the dp_ctrl submodule, removing one
> unnecessary level of indirection.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
[...]

>  
> -	/* set dongle to D3 (power off) mode */
> +	/* set dongle to D3 (ctrl off) mode */
:thinking emoji:

[...]

> +int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
> +		enum dp_pm_type pm_type, bool enable)
> +{
> +	int rc = 0;
> +	struct dp_ctrl_private *ctrl;
> +	struct dss_module_power *mp;
I haven't checked out the rest of the series yet, but cleaning
this up with rc->ret and reverse-Christmas-tree (merry late
Christmas!) would be nice

> +
> +	ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
> +
> +	if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM &&
> +			pm_type != DP_STREAM_PM) {
> +		DRM_ERROR("unsupported ctrl module: %s\n",
> +				dp_parser_pm_name(pm_type));
> +		return -EINVAL;
> +	}
> +
> +	if (enable) {
> +		if (pm_type == DP_CORE_PM && ctrl->core_clks_on) {
again, haven't yet looked through all the patches but this screams
"if (enable && pm_type == DP_CORE_PM)"


Konrad

Re: [PATCH 05/14] drm/msm/dp: fold dp_power into dp_ctrl module

[Dmitry Baryshkov]

On Sat, 30 Dec 2023 at 02:12, Konrad Dybcio <konrad.dybcio@linaro.org> wrote:
>
> On 29.12.2023 23:56, Dmitry Baryshkov wrote:
> > The dp_power submodule is limited to handling the clocks only following
> > previous cleanups. Fold it into the dp_ctrl submodule, removing one
> > unnecessary level of indirection.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> > ---
> [...]
>
> >
> > -     /* set dongle to D3 (power off) mode */
> > +     /* set dongle to D3 (ctrl off) mode */
> :thinking emoji:
>
> [...]
>
> > +int dp_ctrl_clk_enable(struct dp_ctrl *dp_ctrl,
> > +             enum dp_pm_type pm_type, bool enable)
> > +{
> > +     int rc = 0;
> > +     struct dp_ctrl_private *ctrl;
> > +     struct dss_module_power *mp;
> I haven't checked out the rest of the series yet, but cleaning
> this up with rc->ret and reverse-Christmas-tree (merry late
> Christmas!) would be nice
>
> > +
> > +     ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
> > +
> > +     if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM &&
> > +                     pm_type != DP_STREAM_PM) {
> > +             DRM_ERROR("unsupported ctrl module: %s\n",
> > +                             dp_parser_pm_name(pm_type));
> > +             return -EINVAL;
> > +     }
> > +
> > +     if (enable) {
> > +             if (pm_type == DP_CORE_PM && ctrl->core_clks_on) {
> again, haven't yet looked through all the patches but this screams
> "if (enable && pm_type == DP_CORE_PM)"

I'd prefer to keep it as is, it follows the existing code and it is
also more idiomatic: we perform several checks if we were told to
enable clocks.

-- 
With best wishes
Dmitry

Re: [PATCH 13/14] drm/msm/dp: move next_bridge handling to dp_display

[Kuogee Hsieh]

Dmitry,

I am testing this patch serial with msm-next branch.

This patch cause system crash during booting up for me.

Is this patch work for you?

On 12/29/2023 2:56 PM, Dmitry Baryshkov wrote:
> Remove two levels of indirection and fetch next bridge directly in
> dp_display_probe_tail().
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>   drivers/gpu/drm/msm/dp/dp_display.c | 42 +++++++++--------------------
>   drivers/gpu/drm/msm/dp/dp_parser.c  | 14 ----------
>   drivers/gpu/drm/msm/dp/dp_parser.h  | 14 ----------
>   3 files changed, 13 insertions(+), 57 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index 4de0857c31ce..923df47efcc9 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1195,16 +1195,24 @@ static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pde
>   	return NULL;
>   }
>   
> -static int dp_display_get_next_bridge(struct msm_dp *dp);
> -
>   static int dp_display_probe_tail(struct device *dev)
>   {
>   	struct msm_dp *dp = dev_get_drvdata(dev);
>   	int ret;
>   
> -	ret = dp_display_get_next_bridge(dp);
> -	if (ret)
> -		return ret;
> +	/*
> +	 * External bridges are mandatory for eDP interfaces: one has to
> +	 * provide at least an eDP panel (which gets wrapped into panel-bridge).
> +	 *
> +	 * For DisplayPort interfaces external bridges are optional, so
> +	 * silently ignore an error if one is not present (-ENODEV).
> +	 */
> +	dp->next_bridge = devm_drm_of_get_bridge(&dp->pdev->dev, dp->pdev->dev.of_node, 1, 0);
> +	if (IS_ERR(dp->next_bridge)) {
> +		ret = PTR_ERR(dp->next_bridge);
> +		if (dp->is_edp || ret != -ENODEV)
> +			return ret;
> +	}
>   
>   	ret = component_add(dev, &dp_display_comp_ops);
>   	if (ret)
> @@ -1397,30 +1405,6 @@ void dp_display_debugfs_init(struct msm_dp *dp_display, struct dentry *root, boo
>   	}
>   }
>   
> -static int dp_display_get_next_bridge(struct msm_dp *dp)
> -{
> -	int rc;
> -	struct dp_display_private *dp_priv;
> -
> -	dp_priv = container_of(dp, struct dp_display_private, dp_display);
> -
> -	/*
> -	 * External bridges are mandatory for eDP interfaces: one has to
> -	 * provide at least an eDP panel (which gets wrapped into panel-bridge).
> -	 *
> -	 * For DisplayPort interfaces external bridges are optional, so
> -	 * silently ignore an error if one is not present (-ENODEV).
> -	 */
> -	rc = devm_dp_parser_find_next_bridge(&dp->pdev->dev, dp_priv->parser);
> -	if (!dp->is_edp && rc == -ENODEV)
> -		return 0;
> -
> -	if (!rc)
> -		dp->next_bridge = dp_priv->parser->next_bridge;
> -
> -	return rc;
> -}
> -
>   int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
>   			struct drm_encoder *encoder)
>   {
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
> index aa135d5cedbd..f95ab3c5c72c 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.c
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.c
> @@ -24,20 +24,6 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
>   	return 0;
>   }
>   
> -int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser)
> -{
> -	struct platform_device *pdev = parser->pdev;
> -	struct drm_bridge *bridge;
> -
> -	bridge = devm_drm_of_get_bridge(dev, pdev->dev.of_node, 1, 0);
> -	if (IS_ERR(bridge))
> -		return PTR_ERR(bridge);
> -
> -	parser->next_bridge = bridge;
> -
> -	return 0;
> -}
> -
>   static int dp_parser_parse(struct dp_parser *parser)
>   {
>   	int rc = 0;
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
> index bc56e0e8c446..2b39b1c394ae 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.h
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.h
> @@ -22,7 +22,6 @@
>   struct dp_parser {
>   	struct platform_device *pdev;
>   	struct phy *phy;
> -	struct drm_bridge *next_bridge;
>   };
>   
>   /**
> @@ -38,17 +37,4 @@ struct dp_parser {
>    */
>   struct dp_parser *dp_parser_get(struct platform_device *pdev);
>   
> -/**
> - * devm_dp_parser_find_next_bridge() - find an additional bridge to DP
> - *
> - * @dev: device to tie bridge lifetime to
> - * @parser: dp_parser data from client
> - *
> - * This function is used to find any additional bridge attached to
> - * the DP controller. The eDP interface requires a panel bridge.
> - *
> - * Return: 0 if able to get the bridge, otherwise negative errno for failure.
> - */
> -int devm_dp_parser_find_next_bridge(struct device *dev, struct dp_parser *parser);
> -
>   #endif

Re: [PATCH 13/14] drm/msm/dp: move next_bridge handling to dp_display

[Dmitry Baryshkov]

On Fri, 19 Jan 2024 at 23:14, Kuogee Hsieh <quic_khsieh@quicinc.com> wrote:
>
> Dmitry,
>
> I am testing this patch serial with msm-next branch.
>
> This patch cause system crash during booting up for me.
>
> Is this patch work for you?

Yes, tested on top of linux-next. However I only tested it with
DP-over-USBC. What is your testcase? Could you please share the crash
log?

> On 12/29/2023 2:56 PM, Dmitry Baryshkov wrote:
> > Remove two levels of indirection and fetch next bridge directly in
> > dp_display_probe_tail().
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> > ---
> >   drivers/gpu/drm/msm/dp/dp_display.c | 42 +++++++++--------------------
> >   drivers/gpu/drm/msm/dp/dp_parser.c  | 14 ----------
> >   drivers/gpu/drm/msm/dp/dp_parser.h  | 14 ----------
> >   3 files changed, 13 insertions(+), 57 deletions(-)

-- 
With best wishes
Dmitry

Re: [PATCH 13/14] drm/msm/dp: move next_bridge handling to dp_display

[Kuogee Hsieh]

On 1/19/2024 6:31 PM, Dmitry Baryshkov wrote:
> On Fri, 19 Jan 2024 at 23:14, Kuogee Hsieh <quic_khsieh@quicinc.com> wrote:
>> Dmitry,
>>
>> I am testing this patch serial with msm-next branch.
>>
>> This patch cause system crash during booting up for me.
>>
>> Is this patch work for you?
> Yes, tested on top of linux-next. However I only tested it with
> DP-over-USBC. What is your testcase? Could you please share the crash
> log?

I tested it on chrome device (sc7280) which has eDP as primary and 
without external USBC DP connected.

It crashes during boot.

I will debug it more and collect logs for you.


>> On 12/29/2023 2:56 PM, Dmitry Baryshkov wrote:
>>> Remove two levels of indirection and fetch next bridge directly in
>>> dp_display_probe_tail().
>>>
>>> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
>>> ---
>>>    drivers/gpu/drm/msm/dp/dp_display.c | 42 +++++++++--------------------
>>>    drivers/gpu/drm/msm/dp/dp_parser.c  | 14 ----------
>>>    drivers/gpu/drm/msm/dp/dp_parser.h  | 14 ----------
>>>    3 files changed, 13 insertions(+), 57 deletions(-)