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authorAlex Deucher <alexander.deucher@amd.com>2013-07-02 13:05:23 -0400
committerAlex Deucher <alexander.deucher@amd.com>2013-07-17 16:47:52 -0400
commit444bddc4b9b3313a562cd3ba40f780fb82570f7d (patch)
tree0811fd9dcfcf0cb84dfcc8e64279daa6289f73a6
parentf90555cbe629e14c6af1dcec1933a3833ecd321f (diff)
drm/radeon/dpm: add debugfs support for RS780/RS880 (v3)
This allows you to look at the current DPM state via debugfs. Due to the way the hardware works on these asics, there's no way to look up exactly what power state we are in, so we make the best guess we can based on the current sclk. v2: Anthoine's version v3: fix ref div Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
-rw-r--r--drivers/gpu/drm/radeon/radeon_asic.c1
-rw-r--r--drivers/gpu/drm/radeon/radeon_asic.h2
-rw-r--r--drivers/gpu/drm/radeon/rs780_dpm.c25
-rw-r--r--drivers/gpu/drm/radeon/rs780d.h3
4 files changed, 31 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_asic.c b/drivers/gpu/drm/radeon/radeon_asic.c
index fea997e247ba..78bec1a58ed1 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.c
+++ b/drivers/gpu/drm/radeon/radeon_asic.c
@@ -1270,6 +1270,7 @@ static struct radeon_asic rs780_asic = {
.get_sclk = &rs780_dpm_get_sclk,
.get_mclk = &rs780_dpm_get_mclk,
.print_power_state = &rs780_dpm_print_power_state,
+ .debugfs_print_current_performance_level = &rs780_dpm_debugfs_print_current_performance_level,
},
.pflip = {
.pre_page_flip = &rs600_pre_page_flip,
diff --git a/drivers/gpu/drm/radeon/radeon_asic.h b/drivers/gpu/drm/radeon/radeon_asic.h
index b04b5789f4a8..ca1895709908 100644
--- a/drivers/gpu/drm/radeon/radeon_asic.h
+++ b/drivers/gpu/drm/radeon/radeon_asic.h
@@ -433,6 +433,8 @@ u32 rs780_dpm_get_sclk(struct radeon_device *rdev, bool low);
u32 rs780_dpm_get_mclk(struct radeon_device *rdev, bool low);
void rs780_dpm_print_power_state(struct radeon_device *rdev,
struct radeon_ps *ps);
+void rs780_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
+ struct seq_file *m);
/* uvd */
int r600_uvd_init(struct radeon_device *rdev);
diff --git a/drivers/gpu/drm/radeon/rs780_dpm.c b/drivers/gpu/drm/radeon/rs780_dpm.c
index bef832a62fee..d1a1ce73bd45 100644
--- a/drivers/gpu/drm/radeon/rs780_dpm.c
+++ b/drivers/gpu/drm/radeon/rs780_dpm.c
@@ -28,6 +28,7 @@
#include "r600_dpm.h"
#include "rs780_dpm.h"
#include "atom.h"
+#include <linux/seq_file.h>
static struct igp_ps *rs780_get_ps(struct radeon_ps *rps)
{
@@ -961,3 +962,27 @@ u32 rs780_dpm_get_mclk(struct radeon_device *rdev, bool low)
return pi->bootup_uma_clk;
}
+
+void rs780_dpm_debugfs_print_current_performance_level(struct radeon_device *rdev,
+ struct seq_file *m)
+{
+ struct radeon_ps *rps = rdev->pm.dpm.current_ps;
+ struct igp_ps *ps = rs780_get_ps(rps);
+ 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);
+
+ seq_printf(m, "uvd vclk: %d dclk: %d\n", rps->vclk, rps->dclk);
+
+ /* guess based on the current sclk */
+ if (sclk < (ps->sclk_low + 500))
+ seq_printf(m, "power level 0 sclk: %u vddc_index: %d\n",
+ ps->sclk_low, ps->min_voltage);
+ else
+ seq_printf(m, "power level 1 sclk: %u vddc_index: %d\n",
+ ps->sclk_high, ps->max_voltage);
+}
diff --git a/drivers/gpu/drm/radeon/rs780d.h b/drivers/gpu/drm/radeon/rs780d.h
index b1142ed1c628..cfbe9a43d97b 100644
--- a/drivers/gpu/drm/radeon/rs780d.h
+++ b/drivers/gpu/drm/radeon/rs780d.h
@@ -28,6 +28,7 @@
# define SPLL_SLEEP (1 << 1)
# define SPLL_REF_DIV(x) ((x) << 2)
# define SPLL_REF_DIV_MASK (7 << 2)
+# define SPLL_REF_DIV_SHIFT 2
# define SPLL_FB_DIV(x) ((x) << 5)
# define SPLL_FB_DIV_MASK (0xff << 2)
# define SPLL_FB_DIV_SHIFT 2
@@ -36,8 +37,10 @@
# define SPLL_PULSENUM_MASK (3 << 14)
# define SPLL_SW_HILEN(x) ((x) << 16)
# define SPLL_SW_HILEN_MASK (0xf << 16)
+# define SPLL_SW_HILEN_SHIFT 16
# define SPLL_SW_LOLEN(x) ((x) << 20)
# define SPLL_SW_LOLEN_MASK (0xf << 20)
+# define SPLL_SW_LOLEN_SHIFT 20
# define SPLL_DIVEN (1 << 24)
# define SPLL_BYPASS_EN (1 << 25)
# define SPLL_CHG_STATUS (1 << 29)