[PATCHv11 4/6] drm/meson: Fix overflow implicit truncation warnings

Sai Prakash Ranjan
2022-04-28T03:32:34Z

Fix -Woverflow warnings for drm/meson driver which is a result
of moving arm64 custom MMIO accessor macros to asm-generic function
implementations giving a bonus type-checking now and uncovering these
overflow warnings.

drivers/gpu/drm/meson/meson_viu.c: In function ‘meson_viu_init’:
drivers/gpu/drm/meson/meson_registers.h:1826:48: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
#define VIU_OSD_BLEND_REORDER(dest, src) ((src) << (dest * 4))
^
drivers/gpu/drm/meson/meson_viu.c:472:18: note: in expansion of macro ‘VIU_OSD_BLEND_REORDER’
writel_relaxed(VIU_OSD_BLEND_REORDER(0, 1) |
^~~~~~~~~~~~~~~~~~~~~

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
---
drivers/gpu/drm/meson/meson_viu.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_viu.c b/drivers/gpu/drm/meson/meson_viu.c
index 259f3e6bec90..bb7e109534de 100644
--- a/drivers/gpu/drm/meson/meson_viu.c
+++ b/drivers/gpu/drm/meson/meson_viu.c
@@ -469,17 +469,17 @@ void meson_viu_init(struct meson_drm *priv)
priv->io_base + _REG(VD2_IF0_LUMA_FIFO_SIZE));

if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
- writel_relaxed(VIU_OSD_BLEND_REORDER(0, 1) |
- VIU_OSD_BLEND_REORDER(1, 0) |
- VIU_OSD_BLEND_REORDER(2, 0) |
- VIU_OSD_BLEND_REORDER(3, 0) |
- VIU_OSD_BLEND_DIN_EN(1) |
- VIU_OSD_BLEND1_DIN3_BYPASS_TO_DOUT1 |
- VIU_OSD_BLEND1_DOUT_BYPASS_TO_BLEND2 |
- VIU_OSD_BLEND_DIN0_BYPASS_TO_DOUT0 |
- VIU_OSD_BLEND_BLEN2_PREMULT_EN(1) |
- VIU_OSD_BLEND_HOLD_LINES(4),
- priv->io_base + _REG(VIU_OSD_BLEND_CTRL));
+ u32 val = (u32)VIU_OSD_BLEND_REORDER(0, 1) |
+ (u32)VIU_OSD_BLEND_REORDER(1, 0) |
+ (u32)VIU_OSD_BLEND_REORDER(2, 0) |
+ (u32)VIU_OSD_BLEND_REORDER(3, 0) |
+ (u32)VIU_OSD_BLEND_DIN_EN(1) |
+ (u32)VIU_OSD_BLEND1_DIN3_BYPASS_TO_DOUT1 |
+ (u32)VIU_OSD_BLEND1_DOUT_BYPASS_TO_BLEND2 |
+ (u32)VIU_OSD_BLEND_DIN0_BYPASS_TO_DOUT0 |
+ (u32)VIU_OSD_BLEND_BLEN2_PREMULT_EN(1) |
+ (u32)VIU_OSD_BLEND_HOLD_LINES(4);
+ writel_relaxed(val, priv->io_base + _REG(VIU_OSD_BLEND_CTRL));

writel_relaxed(OSD_BLEND_PATH_SEL_ENABLE,
priv->io_base + _REG(OSD1_BLEND_SRC_CTRL));
--
2.33.1