[PATCH 13/15] platform/x86/amd/pmf: Add PMF-AMDGPU set interface

Shyam Sundar S K Shyam-sundar.S-k at amd.com
Fri Sep 22 17:50:54 UTC 2023


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.

Co-developed-by: Mario Limonciello <mario.limonciello at amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c | 21 +++++++++++++++++++++
 drivers/platform/x86/amd/pmf/pmf.h      |  2 ++
 drivers/platform/x86/amd/pmf/tee-if.c   | 19 +++++++++++++++++--
 include/linux/amd-pmf-io.h              |  1 +
 4 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c
index 232d11833ddc..5c567bff0548 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pmf.c
@@ -68,3 +68,24 @@ int amd_pmf_get_gfx_data(struct amd_gpu_pmf_data *pmf)
 	return 0;
 }
 EXPORT_SYMBOL_GPL(amd_pmf_get_gfx_data);
+
+int amd_pmf_set_gfx_data(struct amd_gpu_pmf_data *pmf)
+{
+	struct drm_device *drm_dev = pci_get_drvdata(pmf->gpu_dev);
+	struct amdgpu_device *adev = drm_to_adev(drm_dev);
+	struct backlight_device *bd;
+
+	if (!(adev->flags & AMD_IS_APU)) {
+		DRM_ERROR("PMF-AMDGPU interface not supported\n");
+		return -ENODEV;
+	}
+
+	bd = backlight_device_get_by_type(BACKLIGHT_RAW);
+	if (!bd)
+		return -ENODEV;
+
+	backlight_device_set_brightness(bd, pmf->brightness);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(amd_pmf_set_gfx_data);
diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h
index 9032df4ba48a..ce89cc0daa5a 100644
--- a/drivers/platform/x86/amd/pmf/pmf.h
+++ b/drivers/platform/x86/amd/pmf/pmf.h
@@ -73,6 +73,7 @@
 #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 */
@@ -480,6 +481,7 @@ enum ta_pmf_error_type {
 };
 
 struct pmf_action_table {
+	unsigned long display_brightness;
 	enum system_state system_state;
 	unsigned long spl; /* in mW */
 	unsigned long sppt; /* in mW */
diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c
index 1608996654e8..eefffff83a4c 100644
--- a/drivers/platform/x86/amd/pmf/tee-if.c
+++ b/drivers/platform/x86/amd/pmf/tee-if.c
@@ -79,10 +79,10 @@ 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)
 {
 	u32 val, event = 0;
-	int idx;
+	int idx, ret;
 
 	for (idx = 0; idx < out->actions_count; idx++) {
 		val = out->actions_list[idx].value;
@@ -160,8 +160,23 @@ static void amd_pmf_apply_policies(struct amd_pmf_dev *dev, struct ta_pmf_enact_
 				dev->prev_data->system_state = 0;
 			}
 			break;
+
+		case PMF_POLICY_DISPLAY_BRIGHTNESS:
+			ret = amd_pmf_get_gfx_data(&dev->gfx_data);
+			if (ret)
+				return ret;
+
+			dev->prev_data->display_brightness = dev->gfx_data.brightness;
+			if (dev->prev_data->display_brightness != val) {
+				dev->gfx_data.brightness = val;
+				amd_pmf_set_gfx_data(&dev->gfx_data);
+				dev_dbg(dev->dev, "update DISPLAY_BRIGHTNESS : %d\n", val);
+			}
+			break;
 		}
 	}
+
+	return 0;
 }
 
 static int amd_pmf_invoke_cmd_enact(struct amd_pmf_dev *dev)
diff --git a/include/linux/amd-pmf-io.h b/include/linux/amd-pmf-io.h
index a2d4af231362..ecae387ddaa6 100644
--- a/include/linux/amd-pmf-io.h
+++ b/include/linux/amd-pmf-io.h
@@ -25,4 +25,5 @@ struct amd_gpu_pmf_data {
 };
 
 int amd_pmf_get_gfx_data(struct amd_gpu_pmf_data *pmf);
+int amd_pmf_set_gfx_data(struct amd_gpu_pmf_data *pmf);
 #endif
-- 
2.25.1



More information about the amd-gfx mailing list