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Subject[PATCH 06/19] drm/amd/display/dc/calcs/dce_calcs: Move some large variables from the stack to the heap
Date
Fixes the following W=1 kernel build warning(s):

drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dce_calcs.c: In function ‘calculate_bandwidth’:
drivers/gpu/drm/amd/amdgpu/../display/dc/calcs/dce_calcs.c:2016:1: warning: the frame size of 1216 bytes is larger than 1024 bytes [-Wframe-larger-than=]

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
.../gpu/drm/amd/display/dc/calcs/dce_calcs.c | 32 ++++++++++++++++---
1 file changed, 28 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
index e633f8a51edb6..9d8f2505a61c2 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c
@@ -98,16 +98,16 @@ static void calculate_bandwidth(
int32_t num_cursor_lines;

int32_t i, j, k;
- struct bw_fixed yclk[3];
- struct bw_fixed sclk[8];
+ struct bw_fixed *yclk;
+ struct bw_fixed *sclk;
bool d0_underlay_enable;
bool d1_underlay_enable;
bool fbc_enabled;
bool lpt_enabled;
enum bw_defines sclk_message;
enum bw_defines yclk_message;
- enum bw_defines tiling_mode[maximum_number_of_surfaces];
- enum bw_defines surface_type[maximum_number_of_surfaces];
+ enum bw_defines *tiling_mode;
+ enum bw_defines *surface_type;
enum bw_defines voltage;
enum bw_defines pipe_check;
enum bw_defines hsr_check;
@@ -122,6 +122,22 @@ static void calculate_bandwidth(
int32_t number_of_displays_enabled_with_margin = 0;
int32_t number_of_aligned_displays_with_no_margin = 0;

+ yclk = kcalloc(3, sizeof(*yclk), GFP_KERNEL);
+ if (!yclk)
+ return;
+
+ sclk = kcalloc(8, sizeof(*sclk), GFP_KERNEL);
+ if (!sclk)
+ goto free_yclk;
+
+ tiling_mode = kcalloc(maximum_number_of_surfaces, sizeof(*tiling_mode), GFP_KERNEL);
+ if (!tiling_mode)
+ goto free_sclk;
+
+ surface_type = kcalloc(maximum_number_of_surfaces, sizeof(*surface_type), GFP_KERNEL);
+ if (!surface_type)
+ goto free_tiling_mode;
+
yclk[low] = vbios->low_yclk;
yclk[mid] = vbios->mid_yclk;
yclk[high] = vbios->high_yclk;
@@ -2013,6 +2029,14 @@ static void calculate_bandwidth(
}
}
}
+
+ kfree(surface_type);
+free_tiling_mode:
+ kfree(tiling_mode);
+free_yclk:
+ kfree(yclk);
+free_sclk:
+ kfree(sclk);
}

/*******************************************************************************
--
2.27.0
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