linux-kernel - [PATCH 1/3] drm/amd/pm/smu7: Remove unused smu7_copy_bytes_from

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Message-ID: <20250507002425.93421-2-linux@treblig.org>
Date: Wed,  7 May 2025 01:24:23 +0100
From: linux@...blig.org
To: alexander.deucher@....com,
	kenneth.feng@....com,
	christian.koenig@....com
Cc: airlied@...il.com,
	simona@...ll.ch,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	"Dr. David Alan Gilbert" <linux@...blig.org>
Subject: [PATCH 1/3] drm/amd/pm/smu7: Remove unused smu7_copy_bytes_from_smc

From: "Dr. David Alan Gilbert" <linux@...blig.org>

smu7_copy_bytes_from_smc() was added in 2016 by
commit 1ff55f465103 ("drm/amd/powerplay: implement smu7_smumgr for asics
with smu ip version 7.")

but never used.

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@...blig.org>
---
 .../drm/amd/pm/powerplay/smumgr/smu7_smumgr.c | 36 -------------------
 .../drm/amd/pm/powerplay/smumgr/smu7_smumgr.h |  2 --
 2 files changed, 38 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.c b/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.c
index 5a010cd38303..baf51cd82a35 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.c
@@ -46,42 +46,6 @@ static int smu7_set_smc_sram_address(struct pp_hwmgr *hwmgr, uint32_t smc_addr,
 }
 
 
-int smu7_copy_bytes_from_smc(struct pp_hwmgr *hwmgr, uint32_t smc_start_address, uint32_t *dest, uint32_t byte_count, uint32_t limit)
-{
-	uint32_t data;
-	uint32_t addr;
-	uint8_t *dest_byte;
-	uint8_t i, data_byte[4] = {0};
-	uint32_t *pdata = (uint32_t *)&data_byte;
-
-	PP_ASSERT_WITH_CODE((0 == (3 & smc_start_address)), "SMC address must be 4 byte aligned.", return -EINVAL);
-	PP_ASSERT_WITH_CODE((limit > (smc_start_address + byte_count)), "SMC address is beyond the SMC RAM area.", return -EINVAL);
-
-	addr = smc_start_address;
-
-	while (byte_count >= 4) {
-		smu7_read_smc_sram_dword(hwmgr, addr, &data, limit);
-
-		*dest = PP_SMC_TO_HOST_UL(data);
-
-		dest += 1;
-		byte_count -= 4;
-		addr += 4;
-	}
-
-	if (byte_count) {
-		smu7_read_smc_sram_dword(hwmgr, addr, &data, limit);
-		*pdata = PP_SMC_TO_HOST_UL(data);
-	/* Cast dest into byte type in dest_byte.  This way, we don't overflow if the allocated memory is not 4-byte aligned. */
-		dest_byte = (uint8_t *)dest;
-		for (i = 0; i < byte_count; i++)
-			dest_byte[i] = data_byte[i];
-	}
-
-	return 0;
-}
-
-
 int smu7_copy_bytes_to_smc(struct pp_hwmgr *hwmgr, uint32_t smc_start_address,
 				const uint8_t *src, uint32_t byte_count, uint32_t limit)
 {
diff --git a/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.h b/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.h
index e7303dc8c260..63e428ceaee4 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.h
+++ b/drivers/gpu/drm/amd/pm/powerplay/smumgr/smu7_smumgr.h
@@ -53,8 +53,6 @@ struct smu7_smumgr {
 };
 
 
-int smu7_copy_bytes_from_smc(struct pp_hwmgr *hwmgr, uint32_t smc_start_address,
-				uint32_t *dest, uint32_t byte_count, uint32_t limit);
 int smu7_copy_bytes_to_smc(struct pp_hwmgr *hwmgr, uint32_t smc_start_address,
 			const uint8_t *src, uint32_t byte_count, uint32_t limit);
 int smu7_program_jump_on_start(struct pp_hwmgr *hwmgr);
-- 
2.49.0