Re: [PATCH v2 3/25] drm/amdgpu: Disable ABM when AC mode

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Am 25.03.22 um 05:05 schrieb Ryan Lin:
Disable ABM feature when the system is running on AC mode to get
the more perfect contrast of the display.

Signed-off-by: Ryan Lin <tsung-hua.lin@xxxxxxx>

---
  drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c      |  4 ++
  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c    |  1 +
  drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c | 58 ++++++++++++-------
  drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h       |  1 +
  4 files changed, 42 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
index c560c1ab62ecb..bc8bb9aad2e36 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -822,6 +822,10 @@ static int amdgpu_acpi_event(struct notifier_block *nb,
  	struct amdgpu_device *adev = container_of(nb, struct amdgpu_device, acpi_nb);
  	struct acpi_bus_event *entry = (struct acpi_bus_event *)data;
+ if (strcmp(entry->device_class, "battery") == 0) {

String comparison in a hot path is not something we usually like to see in the kernel.

Isn't there any other way to detect that? Like a flag or similar?

Regards,
Christian.

+		adev->pm.ac_power = power_supply_is_system_supplied() > 0;
+	}
+
  	if (strcmp(entry->device_class, ACPI_AC_CLASS) == 0) {
  		if (power_supply_is_system_supplied() > 0)
  			DRM_DEBUG_DRIVER("pm: AC\n");
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index abfcc1304ba0c..3a0afe7602727 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3454,6 +3454,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
adev->gfx.gfx_off_req_count = 1;
  	adev->pm.ac_power = power_supply_is_system_supplied() > 0;
+	adev->pm.old_ac_power = true;
atomic_set(&adev->throttling_logging_enabled, 1);
  	/*
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
index 54a1408c8015c..478a734b66926 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dmub_abm.c
@@ -23,6 +23,8 @@
   *
   */
+#include <linux/power_supply.h>
+#include "amdgpu.h"
  #include "dmub_abm.h"
  #include "dce_abm.h"
  #include "dc.h"
@@ -51,6 +53,7 @@
  #define DISABLE_ABM_IMMEDIATELY 255
+extern uint amdgpu_dm_abm_level; static void dmub_abm_enable_fractional_pwm(struct dc_context *dc)
  {
@@ -117,28 +120,6 @@ static void dmub_abm_init(struct abm *abm, uint32_t backlight)
  	dmub_abm_enable_fractional_pwm(abm->ctx);
  }
-static unsigned int dmub_abm_get_current_backlight(struct abm *abm)
-{
-	struct dce_abm *dce_abm = TO_DMUB_ABM(abm);
-	unsigned int backlight = REG_READ(BL1_PWM_CURRENT_ABM_LEVEL);
-
-	/* return backlight in hardware format which is unsigned 17 bits, with
-	 * 1 bit integer and 16 bit fractional
-	 */
-	return backlight;
-}
-
-static unsigned int dmub_abm_get_target_backlight(struct abm *abm)
-{
-	struct dce_abm *dce_abm = TO_DMUB_ABM(abm);
-	unsigned int backlight = REG_READ(BL1_PWM_TARGET_ABM_LEVEL);
-
-	/* return backlight in hardware format which is unsigned 17 bits, with
-	 * 1 bit integer and 16 bit fractional
-	 */
-	return backlight;
-}
-
  static bool dmub_abm_set_level(struct abm *abm, uint32_t level)
  {
  	union dmub_rb_cmd cmd;
@@ -148,6 +129,9 @@ static bool dmub_abm_set_level(struct abm *abm, uint32_t level)
  	int edp_num;
  	uint8_t panel_mask = 0;
+ if (power_supply_is_system_supplied() > 0)
+		level = 0;
+
  	get_edp_links(dc->dc, edp_links, &edp_num);
for (i = 0; i < edp_num; i++) {
@@ -170,6 +154,36 @@ static bool dmub_abm_set_level(struct abm *abm, uint32_t level)
  	return true;
  }
+static unsigned int dmub_abm_get_current_backlight(struct abm *abm)
+{
+	struct dce_abm *dce_abm = TO_DMUB_ABM(abm);
+	unsigned int backlight = REG_READ(BL1_PWM_CURRENT_ABM_LEVEL);
+	struct dc_context *dc = abm->ctx;
+	struct amdgpu_device *adev = dc->driver_context;
+
+	if (adev->pm.ac_power != adev->pm.old_ac_power) {
+		dmub_abm_set_level(abm, amdgpu_dm_abm_level);
+		adev->pm.ac_power = power_supply_is_system_supplied() > 0;
+		adev->pm.old_ac_power = adev->pm.ac_power;
+	}
+
+	/* return backlight in hardware format which is unsigned 17 bits, with
+	 * 1 bit integer and 16 bit fractional
+	 */
+	return backlight;
+}
+
+static unsigned int dmub_abm_get_target_backlight(struct abm *abm)
+{
+	struct dce_abm *dce_abm = TO_DMUB_ABM(abm);
+	unsigned int backlight = REG_READ(BL1_PWM_TARGET_ABM_LEVEL);
+
+	/* return backlight in hardware format which is unsigned 17 bits, with
+	 * 1 bit integer and 16 bit fractional
+	 */
+	return backlight;
+}
+
  static bool dmub_abm_init_config(struct abm *abm,
  	const char *src,
  	unsigned int bytes,
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
index f6e0e7d8a0077..de459411a0e83 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
@@ -445,6 +445,7 @@ struct amdgpu_pm {
  	uint32_t                smu_prv_buffer_size;
  	struct amdgpu_bo        *smu_prv_buffer;
  	bool ac_power;
+	bool old_ac_power;
  	/* powerplay feature */
  	uint32_t pp_feature;




[Index of Archives]     [Linux DRI Users]     [Linux Intel Graphics]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux