[PATCH v3] drm/msm/dp: add opp_table corner voting support base on dp_ink_clk rate
Kuogee Hsieh
khsieh at codeaurora.org
Tue Oct 20 22:04:54 UTC 2020
Set link rate by using OPP set rate api so that CX level will be set
accordingly based on the link rate.
Changes in v2:
-- remove dev from dp_ctrl_put() parameters
-- Add more information to commit message
Changes in v3:
-- return when dev_pm_opp_set_clkname() failed
Signed-off-by: Kuogee Hsieh <khsieh at codeaurora.org>
---
drivers/gpu/drm/msm/dp/dp_ctrl.c | 28 ++++++++++++++++++
drivers/gpu/drm/msm/dp/dp_display.c | 2 +-
drivers/gpu/drm/msm/dp/dp_power.c | 44 ++++++++++++++++++++++++++---
drivers/gpu/drm/msm/dp/dp_power.h | 2 +-
4 files changed, 70 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 76e891c91c6e..f12767793211 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -10,6 +10,7 @@
#include <linux/delay.h>
#include <linux/phy/phy.h>
#include <linux/phy/phy-dp.h>
+#include <linux/pm_opp.h>
#include <drm/drm_fixed.h>
#include <drm/drm_dp_helper.h>
#include <drm/drm_print.h>
@@ -76,6 +77,8 @@ struct dp_ctrl_private {
struct dp_parser *parser;
struct dp_catalog *catalog;
+ struct opp_table *opp_table;
+
struct completion idle_comp;
struct completion video_comp;
};
@@ -1833,6 +1836,7 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
struct dp_parser *parser)
{
struct dp_ctrl_private *ctrl;
+ int ret;
if (!dev || !panel || !aux ||
!link || !catalog) {
@@ -1846,6 +1850,21 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
return ERR_PTR(-ENOMEM);
}
+ ctrl->opp_table = dev_pm_opp_set_clkname(dev, "ctrl_link");
+ if (IS_ERR(ctrl->opp_table)) {
+ dev_err(dev, "invalid DP OPP table in device tree\n");
+ /* caller do PTR_ERR(ctrl->opp_table) */
+ return (struct dp_ctrl *)ctrl->opp_table;
+ }
+
+ /* OPP table is optional */
+ ret = dev_pm_opp_of_add_table(dev);
+ if (ret) {
+ dev_err(dev, "failed to add DP OPP table\n");
+ dev_pm_opp_put_clkname(ctrl->opp_table);
+ ctrl->opp_table = NULL;
+ }
+
init_completion(&ctrl->idle_comp);
init_completion(&ctrl->video_comp);
@@ -1863,4 +1882,13 @@ struct dp_ctrl *dp_ctrl_get(struct device *dev, struct dp_link *link,
void dp_ctrl_put(struct dp_ctrl *dp_ctrl)
{
+ struct dp_ctrl_private *ctrl;
+
+ ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
+
+ if (ctrl->opp_table) {
+ dev_pm_opp_of_remove_table(ctrl->dev);
+ dev_pm_opp_put_clkname(ctrl->opp_table);
+ ctrl->opp_table = NULL;
+ }
}
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index c0665a0a4c78..f76139dd495a 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -702,7 +702,7 @@ static int dp_init_sub_modules(struct dp_display_private *dp)
goto error;
}
- dp->power = dp_power_get(dp->parser);
+ 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);
diff --git a/drivers/gpu/drm/msm/dp/dp_power.c b/drivers/gpu/drm/msm/dp/dp_power.c
index 17c1fc6a2d44..9c4ea00a5f2a 100644
--- a/drivers/gpu/drm/msm/dp/dp_power.c
+++ b/drivers/gpu/drm/msm/dp/dp_power.c
@@ -8,12 +8,14 @@
#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 platform_device *pdev;
+ struct device *dev;
struct clk *link_clk_src;
struct clk *pixel_provider;
struct clk *link_provider;
@@ -148,18 +150,51 @@ static int dp_power_clk_deinit(struct dp_power_private *power)
return 0;
}
+static int dp_power_clk_set_link_rate(struct dp_power_private *power,
+ struct dss_clk *clk_arry, int num_clk, int enable)
+{
+ u32 rate;
+ int i, rc = 0;
+
+ for (i = 0; i < num_clk; i++) {
+ if (clk_arry[i].clk) {
+ if (clk_arry[i].type == DSS_CLK_PCLK) {
+ if (enable)
+ rate = clk_arry[i].rate;
+ else
+ rate = 0;
+
+ rc = dev_pm_opp_set_rate(power->dev, rate);
+ if (rc)
+ break;
+ }
+
+ }
+ }
+ return rc;
+}
+
static int dp_power_clk_set_rate(struct dp_power_private *power,
enum dp_pm_type module, bool enable)
{
int rc = 0;
struct dss_module_power *mp = &power->parser->mp[module];
- if (enable) {
- rc = msm_dss_clk_set_rate(mp->clk_config, mp->num_clk);
+ if (module == DP_CTRL_PM) {
+ rc = dp_power_clk_set_link_rate(power, mp->clk_config, mp->num_clk, enable);
if (rc) {
- DRM_ERROR("failed to set clks rate.\n");
+ DRM_ERROR("failed to set link clks rate\n");
return rc;
}
+ } else {
+
+ if (enable) {
+ rc = msm_dss_clk_set_rate(mp->clk_config, mp->num_clk);
+ if (rc) {
+ DRM_ERROR("failed to set clks rate\n");
+ return rc;
+ }
+ }
}
rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, enable);
@@ -349,7 +384,7 @@ int dp_power_deinit(struct dp_power *dp_power)
return 0;
}
-struct dp_power *dp_power_get(struct dp_parser *parser)
+struct dp_power *dp_power_get(struct device *dev, struct dp_parser *parser)
{
struct dp_power_private *power;
struct dp_power *dp_power;
@@ -365,6 +400,7 @@ struct dp_power *dp_power_get(struct dp_parser *parser)
power->parser = parser;
power->pdev = parser->pdev;
+ power->dev = dev;
dp_power = &power->dp_power;
diff --git a/drivers/gpu/drm/msm/dp/dp_power.h b/drivers/gpu/drm/msm/dp/dp_power.h
index 76743d755833..7d0327bbc0d5 100644
--- a/drivers/gpu/drm/msm/dp/dp_power.h
+++ b/drivers/gpu/drm/msm/dp/dp_power.h
@@ -102,6 +102,6 @@ void dp_power_client_deinit(struct dp_power *power);
* methods to be called by the client to configure the power related
* modueles.
*/
-struct dp_power *dp_power_get(struct dp_parser *parser);
+struct dp_power *dp_power_get(struct device *dev, struct dp_parser *parser);
#endif /* _DP_POWER_H_ */
base-commit: 0855cb4b31953b8c539e57b970da8146bcd4405a
prerequisite-patch-id: 6221bf61b4663cab27a511b59735639aa475ee6c
--
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