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Commit f44a0120 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/radeon/dpm: fix si_calculate_memory_refresh_rate() 



Update alogorithm as per internal advice.

Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 489bc476

drivers/gpu/drm/radeon/si_dpm.c

+3 −6
Original line number Diff line number Diff line
@@ -37,8 +37,6 @@ 


#define SMC_RAM_END                 0x20000



#define DDR3_DRAM_ROWS              0x2000



#define SCLK_MIN_DEEPSLEEP_FREQ     1350



static const struct si_cac_config_reg cac_weights_tahiti[] =
@@ -4040,16 +4038,15 @@ static int si_force_switch_to_arb_f0(struct radeon_device *rdev) 
static u32 si_calculate_memory_refresh_rate(struct radeon_device *rdev,

					    u32 engine_clock)

{

	struct rv7xx_power_info *pi = rv770_get_pi(rdev);

	u32 dram_rows;

	u32 dram_refresh_rate;

	u32 mc_arb_rfsh_rate;

	u32 tmp = (RREG32(MC_ARB_RAMCFG) & NOOFROWS_MASK) >> NOOFROWS_SHIFT;



	if (pi->mem_gddr5)

		dram_rows = 1 << (tmp + 10);

	if (tmp >= 4)

		dram_rows = 16384;

	else

		dram_rows = DDR3_DRAM_ROWS;

		dram_rows = 1 << (tmp + 10);



	dram_refresh_rate = 1 << ((RREG32(MC_SEQ_MISC0) & 0x3) + 3);

	mc_arb_rfsh_rate = ((engine_clock * 10) * dram_refresh_rate / dram_rows - 32) / 64;