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drm/radeon/rs780: implement get_current_sclk/mclk 

Will be used for exposing current clocks via INFO ioctl.

Tested-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2014-09-30 10:19:57 -04:00
parent d7dbce09b6
commit 3c94566ce1
3 changed files with 26 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/radeon/radeon_asic.c
View File

@ -1170,6 +1170,8 @@ static struct radeon_asic rs780_asic = {
.print_power_state = &rs780_dpm_print_power_state,
.debugfs_print_current_performance_level = &rs780_dpm_debugfs_print_current_performance_level,
.force_performance_level = &rs780_dpm_force_performance_level,
.get_current_sclk = &rs780_dpm_get_current_sclk,
.get_current_mclk = &rs780_dpm_get_current_mclk,
},
.pflip = {
.page_flip = &rs600_page_flip,

2
drivers/gpu/drm/radeon/radeon_asic.h
View File

@ -449,6 +449,8 @@ void rs780_dpm_debugfs_print_current_performance_level(struct radeon_device *rde
struct seq_file *m);
int rs780_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level);
u32 rs780_dpm_get_current_sclk(struct radeon_device *rdev);
u32 rs780_dpm_get_current_mclk(struct radeon_device *rdev);
/*
* rv770,rv730,rv710,rv740

22
drivers/gpu/drm/radeon/rs780_dpm.c
View File

@ -1001,6 +1001,28 @@ void rs780_dpm_debugfs_print_current_performance_level(struct radeon_device *rde
ps->sclk_high, ps->max_voltage);
}
/* get the current sclk in 10 khz units */
u32 rs780_dpm_get_current_sclk(struct radeon_device *rdev)
{
u32 current_fb_div = RREG32(FVTHROT_STATUS_REG0) & CURRENT_FEEDBACK_DIV_MASK;
u32 func_cntl = RREG32(CG_SPLL_FUNC_CNTL);
u32 ref_div = ((func_cntl & SPLL_REF_DIV_MASK) >> SPLL_REF_DIV_SHIFT) + 1;
u32 post_div = ((func_cntl & SPLL_SW_HILEN_MASK) >> SPLL_SW_HILEN_SHIFT) + 1 +
((func_cntl & SPLL_SW_LOLEN_MASK) >> SPLL_SW_LOLEN_SHIFT) + 1;
u32 sclk = (rdev->clock.spll.reference_freq * current_fb_div) /
(post_div * ref_div);
return sclk;
}
/* get the current mclk in 10 khz units */
u32 rs780_dpm_get_current_mclk(struct radeon_device *rdev)
{
struct igp_power_info *pi = rs780_get_pi(rdev);
return pi->bootup_uma_clk;
}
int rs780_dpm_force_performance_level(struct radeon_device *rdev,
enum radeon_dpm_forced_level level)
{