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drm/radeon/kms: pull power mode info from bios tables (v3)

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The general idea is to validate the current hw state
against the set of power states and select a power
state based on that.  This patch just pulls the power
states from the bios and prints the information.  It
is not currently hooked up in the actual power management
code.  Hooking it up will require reworking the the current
power state selection code and will be handled in a future
patch.

Additionally, we'd need to decide on some default lower
power states for cards without power tables.

v2 - increment state_index after checking for default state
v3 - fix typo in pm init on pre-atom cards, handle pre-atom
cards without x86 bioses

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2009-12-28 13:58:44 -05:00 • committed by Dave Airlie
parent c836a41267
commit 56278a8eda
4 changed files with 506 additions and 0 deletions
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38
drivers/gpu/drm/radeon/radeon_pm.c
View file

@ -18,6 +18,7 @@
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Rafał Miłecki <zajec5@gmail.com>
* Alex Deucher <alexdeucher@gmail.com>
*/
#include "drmP.h"
#include "radeon.h"
@ -39,6 +40,35 @@ static const char *pm_state_names[4] = {
"PM_STATE_ACTIVE"
};
static void radeon_print_power_mode_info(struct radeon_device *rdev)
{
int i, j;
bool is_default;
DRM_INFO("%d Power State(s)\n", rdev->pm.num_power_states);
for (i = 0; i < rdev->pm.num_power_states; i++) {
if (rdev->pm.default_power_state == &rdev->pm.power_state[i])
is_default = true;
else
is_default = false;
DRM_INFO("State %d %s\n", i, is_default ? "(default)" : "");
if ((rdev->flags & RADEON_IS_PCIE) && !(rdev->flags & RADEON_IS_IGP))
DRM_INFO("\t%d PCIE Lanes\n", rdev->pm.power_state[i].non_clock_info.pcie_lanes);
DRM_INFO("\t%d Clock Mode(s)\n", rdev->pm.power_state[i].num_clock_modes);
for (j = 0; j < rdev->pm.power_state[i].num_clock_modes; j++) {
if (rdev->flags & RADEON_IS_IGP)
DRM_INFO("\t\t%d engine: %d\n",
j,
rdev->pm.power_state[i].clock_info[j].sclk * 10);
else
DRM_INFO("\t\t%d engine/memory: %d/%d\n",
j,
rdev->pm.power_state[i].clock_info[j].sclk * 10,
rdev->pm.power_state[i].clock_info[j].mclk * 10);
}
}
}
int radeon_pm_init(struct radeon_device *rdev)
{
rdev->pm.state = PM_STATE_DISABLED;
@ -46,6 +76,14 @@ int radeon_pm_init(struct radeon_device *rdev)
rdev->pm.downclocked = false;
rdev->pm.vblank_callback = false;
if (rdev->bios) {
if (rdev->is_atom_bios)
radeon_atombios_get_power_modes(rdev);
else
radeon_combios_get_power_modes(rdev);
radeon_print_power_mode_info(rdev);
}
radeon_pm_check_limits(rdev);
if (radeon_debugfs_pm_init(rdev)) {