add ax88772_rst

hc

2024-05-10 9999e48639b3cecb08ffb37358bcba3b48161b29

 kernel/drivers/gpu/drm/radeon/cypress_dpm.c
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@@ -22,13 +22,14 @@
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  * Authors: Alex Deucher
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  */
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-#include <drm/drmP.h>
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-#include "radeon.h"
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-#include "radeon_asic.h"
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+#include <linux/pci.h>
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+
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+#include "atom.h"
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+#include "cypress_dpm.h"
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 #include "evergreend.h"
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 #include "r600_dpm.h"
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-#include "cypress_dpm.h"
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-#include "atom.h"
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+#include "radeon.h"
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+#include "radeon_asic.h"
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 #define SMC_RAM_END 0x8000
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@@ -558,8 +559,12 @@
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 						     ASIC_INTERNAL_MEMORY_SS, vco_freq)) {
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 			u32 reference_clock = rdev->clock.mpll.reference_freq;
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 			u32 decoded_ref = rv740_get_decoded_reference_divider(dividers.ref_div);
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-			u32 clk_s = reference_clock * 5 / (decoded_ref * ss.rate);
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-			u32 clk_v = ss.percentage *
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+			u32 clk_s, clk_v;
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+
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+			if (!decoded_ref)
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+				return -EINVAL;
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+			clk_s = reference_clock * 5 / (decoded_ref * ss.rate);
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+			clk_v = ss.percentage *
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 				(0x4000 * dividers.whole_fb_div + 0x800 * dividers.frac_fb_div) / (clk_s * 625);
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 			mpll_ss1 &= ~CLKV_MASK;