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Commit 7102e232 authored by Alex Deucher's avatar Alex Deucher
Browse files

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: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 142a4e90

drivers/gpu/drm/radeon/btc_dpm.c

+17 −0
Original line number Diff line number Diff line
@@ -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)

{

drivers/gpu/drm/radeon/btc_dpm.h

+2 −0
Original line number Diff line number Diff line
@@ -46,6 +46,8 @@ void btc_adjust_clock_combinations(struct radeon_device *rdev, 
				   struct rv7xx_pl *pl);

void btc_apply_voltage_dependency_rules(struct radeon_clock_voltage_dependency_table *table,

					u32 clock, u16 max_voltage, u16 *voltage);

void btc_get_max_clock_from_voltage_dependency_table(struct radeon_clock_voltage_dependency_table *table,

						     u32 *max_clock);

void btc_apply_voltage_delta_rules(struct radeon_device *rdev,

				   u16 max_vddc, u16 max_vddci,

				   u16 *vddc, u16 *vddci);