dma_addr_t may be 32 or 64 bits long on 32-bit CPUs, so we cannot cast it to a pointer without getting a compiler warning:

drivers/gpu/drm/exynos/exynos_drm_buf.c: In function 'lowlevel_buffer_allocate': drivers/gpu/drm/exynos/exynos_drm_buf.c:109:18: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] buf->dma_addr = (dma_addr_t)NULL; ^

The use of pointers is wrong here anyway, and so is the cast to the same type, and printing the value as a 32-bit instance.

This patch tries for address all these issues in the exynos drm driver, by printing the values as %pad and removing the bogus type casts.

I've added '& 0xffffffff' masks in a few places I found where a dma_addr_t is assigned to a 32-bit value, as a reminder that this code will not work with 64-bit dma addresses. There should not be any change in the generated code here.

Signed-off-by: Arnd Bergmann arnd@arndb.de --- I send this one ages ago but never got a reaction. I rebased it several times when the driver changed, and it still seems to be needed.

diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c index 3119ababaa13..5279878bbc7f 100644 --- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c +++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c @@ -399,7 +399,7 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc, */

/* buffer start address */ - val = (unsigned long)plane->dma_addr[0]; + val = (u32)plane->dma_addr[0] & 0xffffffff; writel(val, ctx->regs + VIDW_BUF_START(win));

padding = (pitch / bpp) - state->fb->width; @@ -412,8 +412,7 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc, writel(plane->src_x, ctx->regs + VIDW_OFFSET_X(win)); writel(plane->src_y, ctx->regs + VIDW_OFFSET_Y(win));

- DRM_DEBUG_KMS("start addr = 0x%lx\n", - (unsigned long)val); + DRM_DEBUG_KMS("start addr = %pad\n", &plane->dma_addr[0]); DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", plane->crtc_w, plane->crtc_h);

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fb.c b/drivers/gpu/drm/exynos/exynos_drm_fb.c index fcea28bdbc42..0c47dce643d7 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fb.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fb.c @@ -201,7 +201,7 @@ struct exynos_drm_gem *exynos_drm_fb_gem(struct drm_framebuffer *fb, int index) if (!exynos_gem) return NULL;

- DRM_DEBUG_KMS("dma_addr: 0x%lx\n", (unsigned long)exynos_gem->dma_addr); + DRM_DEBUG_KMS("dma_addr: %pad\n", &exynos_gem->dma_addr);

return exynos_gem; } diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index ae9727174168..56cf506d1336 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -633,16 +633,16 @@ static void fimd_update_plane(struct exynos_drm_crtc *crtc,

/* buffer start address */ dma_addr = plane->dma_addr[0] + offset; - val = (unsigned long)dma_addr; + val = (u32)dma_addr & 0xffffffff; writel(val, ctx->regs + VIDWx_BUF_START(win, 0));

/* buffer end address */ size = pitch * plane->crtc_h; - val = (unsigned long)(dma_addr + size); + val = (u32)((dma_addr + size) & 0xffffffff); writel(val, ctx->regs + VIDWx_BUF_END(win, 0));

- DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n", - (unsigned long)dma_addr, val, size); + DRM_DEBUG_KMS("start addr = %pad, end addr = %pad, size = 0x%lx\n", + &dma_addr, &val, size); DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", plane->crtc_w, plane->crtc_h);

diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c index c17efdb238a6..b0a9b362c5b0 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c @@ -350,7 +350,7 @@ static void g2d_add_cmdlist_to_inuse(struct exynos_drm_g2d_private *g2d_priv, /* this links to base address of new cmdlist */ lnode = list_entry(g2d_priv->inuse_cmdlist.prev, struct g2d_cmdlist_node, list); - lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr; + lnode->cmdlist->data[lnode->cmdlist->last] = node->dma_addr & 0xffffffff;

add_to_list: list_add_tail(&node->list, &g2d_priv->inuse_cmdlist); diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c index 252eb301470c..666f041ca343 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gem.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c @@ -89,8 +89,8 @@ static int exynos_drm_alloc_buf(struct exynos_drm_gem *exynos_gem)

sg_free_table(&sgt);

- DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n", - (unsigned long)exynos_gem->dma_addr, exynos_gem->size); + DRM_DEBUG_KMS("dma_addr(%pad), size(0x%lx)\n", + &exynos_gem->dma_addr, exynos_gem->size);

return 0;

@@ -114,8 +114,8 @@ static void exynos_drm_free_buf(struct exynos_drm_gem *exynos_gem) return; }

- DRM_DEBUG_KMS("dma_addr(0x%lx), size(0x%lx)\n", - (unsigned long)exynos_gem->dma_addr, exynos_gem->size); + DRM_DEBUG_KMS("dma_addr(%pad), size(0x%lx)\n", + &exynos_gem->dma_addr, exynos_gem->size);

dma_free_attrs(dev->dev, exynos_gem->size, exynos_gem->cookie, (dma_addr_t)exynos_gem->dma_addr, diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c index 67d24236e745..ec2056f91b36 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c +++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c @@ -582,8 +582,8 @@ static struct drm_exynos_ipp_mem_node

buf_info->handles[i] = qbuf->handle[i]; buf_info->base[i] = *addr; - DRM_DEBUG_KMS("i[%d]base[0x%x]hd[0x%lx]\n", i, - buf_info->base[i], buf_info->handles[i]); + DRM_DEBUG_KMS("i[%d]base[%pad]hd[0x%lx]\n", i, + &buf_info->base[i], buf_info->handles[i]); } }