[v4,14/17] platform/x86/amd/pmf: Add PMF-AMDGPU set interface

Commit Message

Shyam Sundar S K Oct. 18, 2023, 7:02 a.m. UTC

For the Smart PC Solution to fully work, it has to enact to the actions
coming from TA. Add the initial code path for set interface to AMDGPU.

Change amd_pmf_apply_policies() return type, so that it can return
errors when the call to retrieve information from amdgpu fails.

Co-developed-by: Mario Limonciello <[e-mail]>
Signed-off-by: Mario Limonciello <[e-mail]>
Signed-off-by: Shyam Sundar S K <[e-mail]>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c | 18 ++++++++++++++++++
 drivers/platform/x86/amd/pmf/pmf.h      |  2 ++
 drivers/platform/x86/amd/pmf/tee-if.c   | 21 +++++++++++++++++++--
 3 files changed, 39 insertions(+), 2 deletions(-)

Patch

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c
index ac981848df50..57acfc32219a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c
@@ -63,6 +63,23 @@  int amd_pmf_get_gfx_data(struct amd_gpu_pmf_data *pmf)
 }
 EXPORT_SYMBOL_GPL(amd_pmf_get_gfx_data);
 
+static int amd_pmf_gpu_set_cur_state(struct thermal_cooling_device *cooling_dev,
+				     unsigned long state)
+{
+	struct backlight_device *bd;
+
+	if (!acpi_video_backlight_use_native())
+		return -ENODEV;
+
+	bd = backlight_device_get_by_type(BACKLIGHT_RAW);
+	if (!bd)
+		return -ENODEV;
+
+	backlight_device_set_brightness(bd, state);
+
+	return 0;
+}
+
 static int amd_pmf_gpu_get_cur_state(struct thermal_cooling_device *cooling_dev,
 				     unsigned long *state)
 {
@@ -103,6 +120,7 @@  static int amd_pmf_gpu_get_max_state(struct thermal_cooling_device *cooling_dev,
 static const struct thermal_cooling_device_ops bd_cooling_ops = {
 	.get_max_state = amd_pmf_gpu_get_max_state,
 	.get_cur_state = amd_pmf_gpu_get_cur_state,
+	.set_cur_state = amd_pmf_gpu_set_cur_state,
 };
 
 int amd_pmf_gpu_init(struct amd_gpu_pmf_data *pmf)
diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
index 615cd3a31986..641af94ba378 100644
--- a/drivers/platform/x86/amd/pmf/pmf.h
+++ b/drivers/platform/x86/amd/pmf/pmf.h
@@ -75,6 +75,7 @@ 
 #define PMF_POLICY_STT_SKINTEMP_APU				7
 #define PMF_POLICY_STT_SKINTEMP_HS2				8
 #define PMF_POLICY_SYSTEM_STATE					9
+#define PMF_POLICY_DISPLAY_BRIGHTNESS				12
 #define PMF_POLICY_P3T						38
 
 /* TA macros */
@@ -488,6 +489,7 @@  enum ta_pmf_error_type {
 };
 
 struct pmf_action_table {
+	unsigned long display_brightness;
 	enum system_state system_state;
 	u32 spl;		/* in mW */
 	u32 sppt;		/* in mW */
diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index 956e66b78605..b39f30a4f92d 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c
@@ -77,8 +77,10 @@  static int amd_pmf_update_uevents(struct amd_pmf_dev *dev, u16 event)
 	return 0;
 }
 
-static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_result *out)
+static int amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_result *out)
 {
+	struct thermal_cooling_device *cdev = dev->gfx_data.cooling_dev;
+	unsigned long state;
 	u32 val;
 	int idx;
 
@@ -154,8 +156,21 @@  static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_
 			dev_dbg(dev->dev, "update SYSTEM_STATE : %s\n",
 				amd_pmf_uevent_as_str(val));
 			break;
+
+		case PMF_POLICY_DISPLAY_BRIGHTNESS:
+			if (!dev->gfx_data.gpu_dev_en)
+				return -ENODEV;
+
+			cdev->ops->get_cur_state(cdev, &state);
+			if (state != val) {
+				cdev->ops->set_cur_state(cdev, val);
+				dev_dbg(dev->dev, "update DISPLAY_BRIGHTNESS : %u\n", val);
+			}
+			break;
 		}
 	}
+
+	return 0;
 }
 
 static int amd_pmf_invoke_cmd_enact(struct amd_pmf_dev *dev)
@@ -192,7 +207,9 @@  static int amd_pmf_invoke_cmd_enact(struct amd_pmf_dev *dev)
 		amd_pmf_dump_ta_inputs(dev, in);
 		dev_dbg(dev->dev, "action count:%u result:%x\n", out->actions_count,
 			ta_sm->pmf_result);
-		amd_pmf_apply_policies(dev, out);
+		ret = amd_pmf_apply_policies(dev, out);
+		if (ret)
+			return ret;
 	}
 
 	return 0;