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drm/radeon: add bapm module parameter 

Add a module paramter to enable bapm on APUs.  It's disabled
by default on certain APUs due to stability issues.  This
option makes it easier to test and to enable it on systems that
are stable.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=81021

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Deucher 2014-08-07 09:28:31 -04:00
parent 251964845f
commit 6e909f74db
4 changed files with 24 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/gpu/drm/radeon/kv_dpm.c
View File

@ -2726,7 +2726,10 @@ int kv_dpm_init(struct radeon_device *rdev)
pi->caps_sclk_ds = true;
pi->enable_auto_thermal_throttling = true;
pi->disable_nb_ps3_in_battery = false;
pi->bapm_enable = true;
if (radeon_bapm == 0)
pi->bapm_enable = false;
else
pi->bapm_enable = true;
pi->voltage_drop_t = 0;
pi->caps_sclk_throttle_low_notification = false;
pi->caps_fps = false; /* true? */

1
drivers/gpu/drm/radeon/radeon.h
View File

@ -105,6 +105,7 @@ extern int radeon_vm_size;
extern int radeon_vm_block_size;
extern int radeon_deep_color;
extern int radeon_use_pflipirq;
extern int radeon_bapm;
/*
* Copy from radeon_drv.h so we don't have to include both and have conflicting

4
drivers/gpu/drm/radeon/radeon_drv.c
View File

@ -180,6 +180,7 @@ int radeon_vm_size = 8;
int radeon_vm_block_size = -1;
int radeon_deep_color = 0;
int radeon_use_pflipirq = 2;
int radeon_bapm = -1;
MODULE_PARM_DESC(no_wb, "Disable AGP writeback for scratch registers");
module_param_named(no_wb, radeon_no_wb, int, 0444);
@ -259,6 +260,9 @@ module_param_named(deep_color, radeon_deep_color, int, 0444);
MODULE_PARM_DESC(use_pflipirq, "Pflip irqs for pageflip completion (0 = disable, 1 = as fallback, 2 = exclusive (default))");
module_param_named(use_pflipirq, radeon_use_pflipirq, int, 0444);
MODULE_PARM_DESC(bapm, "BAPM support (1 = enable, 0 = disable, -1 = auto)");
module_param_named(bapm, radeon_bapm, int, 0444);
static struct pci_device_id pciidlist[] = {
radeon_PCI_IDS
};

24
drivers/gpu/drm/radeon/trinity_dpm.c
View File

@ -1874,16 +1874,22 @@ int trinity_dpm_init(struct radeon_device *rdev)
for (i = 0; i < SUMO_MAX_HARDWARE_POWERLEVELS; i++)
pi->at[i] = TRINITY_AT_DFLT;
/* There are stability issues reported on with
* bapm enabled when switching between AC and battery
* power. At the same time, some MSI boards hang
* if it's not enabled and dpm is enabled. Just enable
* it for MSI boards right now.
*/
if (rdev->pdev->subsystem_vendor == 0x1462)
pi->enable_bapm = true;
else
if (radeon_bapm == -1) {
/* There are stability issues reported on with
* bapm enabled when switching between AC and battery
* power. At the same time, some MSI boards hang
* if it's not enabled and dpm is enabled. Just enable
* it for MSI boards right now.
*/
if (rdev->pdev->subsystem_vendor == 0x1462)
pi->enable_bapm = true;
else
pi->enable_bapm = false;
} else if (radeon_bapm == 0) {
pi->enable_bapm = false;
} else {
pi->enable_bapm = true;
}
pi->enable_nbps_policy = true;
pi->enable_sclk_ds = true;
pi->enable_gfx_power_gating = true;