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authorAlex Deucher <alexander.deucher@amd.com>2013-09-21 21:47:57 +0400
committerAlex Deucher <alexander.deucher@amd.com>2013-09-23 18:29:51 +0400
commit7102e23288f9fb6f1c53a7ed27707cf1b4f22227 (patch)
tree84844a72d66c015dc687b9a45e2601f277d6424a /drivers/gpu/drm/radeon/btc_dpm.c
parent142a4e9079e4c81a003bd966a6bf5ca7f466057a (diff)
downloadlinux-7102e23288f9fb6f1c53a7ed27707cf1b4f22227.tar.xz
drm/radeon/dpm: fetch the max clk from voltage dep tables helper
This patch adds a helper function to fetch the max clock from the voltage clock dependecy tables. Clocks above that level tend to be unstable and will require additional driver tweaks in order to work properly. This patch implemented the helper function to fetch the max clocks from the dependency tables. The following patches implement the per-asic clock filtering. See bug: https://bugs.freedesktop.org/show_bug.cgi?id=68235 Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/btc_dpm.c')
-rw-r--r--drivers/gpu/drm/radeon/btc_dpm.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/btc_dpm.c b/drivers/gpu/drm/radeon/btc_dpm.c
index 05ff315e8e9e..0d0f065a499c 100644
--- a/drivers/gpu/drm/radeon/btc_dpm.c
+++ b/drivers/gpu/drm/radeon/btc_dpm.c
@@ -1168,6 +1168,23 @@ static const struct radeon_blacklist_clocks btc_blacklist_clocks[] =
{ 25000, 30000, RADEON_SCLK_UP }
};
+void btc_get_max_clock_from_voltage_dependency_table(struct radeon_clock_voltage_dependency_table *table,
+ u32 *max_clock)
+{
+ u32 i, clock = 0;
+
+ if ((table == NULL) || (table->count == 0)) {
+ *max_clock = clock;
+ return;
+ }
+
+ for (i = 0; i < table->count; i++) {
+ if (clock < table->entries[i].clk)
+ clock = table->entries[i].clk;
+ }
+ *max_clock = clock;
+}
+
void btc_apply_voltage_dependency_rules(struct radeon_clock_voltage_dependency_table *table,
u32 clock, u16 max_voltage, u16 *voltage)
{