[1/2] drm/msm: Garbage collect unused resource _len fields.

Message ID 20200629181921.3019271-1-eric@anholt.net
State Accepted
Commit ecf9cd48994afaa1cb9f1ff5e5575ab468b10a3a
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Series
  • [1/2] drm/msm: Garbage collect unused resource _len fields.
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Commit Message

Eric Anholt June 29, 2020, 6:19 p.m.
Nothing was using the lengths of these ioremaps.

Signed-off-by: Eric Anholt <eric@anholt.net>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c  | 21 ---------------------
 drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h  |  1 -
 drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c |  9 ---------
 3 files changed, 31 deletions(-)

Comments

Rob Clark June 29, 2020, 7:57 p.m. | #1
On Mon, Jun 29, 2020 at 11:19 AM Eric Anholt <eric@anholt.net> wrote:
>
> We don't expect to find vbif_nrt or regdma on cheza, but were clogging
> up dmesg with errors about it.

nit: s/cheza/sdm845/ (since this really applies to the SoC rather than
the board..

also, maybe msm_ioremap_optional() ?

BR,
-R

>
> Signed-off-by: Eric Anholt <eric@anholt.net>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c |  4 ++--
>  drivers/gpu/drm/msm/msm_drv.c           | 22 ++++++++++++++++++----
>  drivers/gpu/drm/msm/msm_drv.h           |  2 ++
>  3 files changed, 22 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index a4ab802fee6d..d9aef2b5e930 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -838,13 +838,13 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
>                 dpu_kms->vbif[VBIF_RT] = NULL;
>                 goto error;
>         }
> -       dpu_kms->vbif[VBIF_NRT] = msm_ioremap(dpu_kms->pdev, "vbif_nrt", "vbif_nrt");
> +       dpu_kms->vbif[VBIF_NRT] = msm_ioremap_quiet(dpu_kms->pdev, "vbif_nrt", "vbif_nrt");
>         if (IS_ERR(dpu_kms->vbif[VBIF_NRT])) {
>                 dpu_kms->vbif[VBIF_NRT] = NULL;
>                 DPU_DEBUG("VBIF NRT is not defined");
>         }
>
> -       dpu_kms->reg_dma = msm_ioremap(dpu_kms->pdev, "regdma", "regdma");
> +       dpu_kms->reg_dma = msm_ioremap_quiet(dpu_kms->pdev, "regdma", "regdma");
>         if (IS_ERR(dpu_kms->reg_dma)) {
>                 dpu_kms->reg_dma = NULL;
>                 DPU_DEBUG("REG_DMA is not defined");
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index f6ce40bf3699..df4a3c6a49cd 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -120,8 +120,8 @@ struct clk *msm_clk_get(struct platform_device *pdev, const char *name)
>         return clk;
>  }
>
> -void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
> -               const char *dbgname)
> +void __iomem *_msm_ioremap(struct platform_device *pdev, const char *name,
> +                          const char *dbgname, bool quiet)
>  {
>         struct resource *res;
>         unsigned long size;
> @@ -133,7 +133,8 @@ void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
>                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>
>         if (!res) {
> -               DRM_DEV_ERROR(&pdev->dev, "failed to get memory resource: %s\n", name);
> +               if (!quiet)
> +                       DRM_DEV_ERROR(&pdev->dev, "failed to get memory resource: %s\n", name);
>                 return ERR_PTR(-EINVAL);
>         }
>
> @@ -141,7 +142,8 @@ void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
>
>         ptr = devm_ioremap(&pdev->dev, res->start, size);
>         if (!ptr) {
> -               DRM_DEV_ERROR(&pdev->dev, "failed to ioremap: %s\n", name);
> +               if (!quiet)
> +                       DRM_DEV_ERROR(&pdev->dev, "failed to ioremap: %s\n", name);
>                 return ERR_PTR(-ENOMEM);
>         }
>
> @@ -151,6 +153,18 @@ void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
>         return ptr;
>  }
>
> +void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
> +                         const char *dbgname)
> +{
> +       return _msm_ioremap(pdev, name, dbgname, false);
> +}
> +
> +void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name,
> +                               const char *dbgname)
> +{
> +       return _msm_ioremap(pdev, name, dbgname, true);
> +}
> +
>  void msm_writel(u32 data, void __iomem *addr)
>  {
>         if (reglog)
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index e2d6a6056418..2687f7a42c15 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -411,6 +411,8 @@ struct clk *msm_clk_bulk_get_clock(struct clk_bulk_data *bulk, int count,
>         const char *name);
>  void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
>                 const char *dbgname);
> +void __iomem *msm_ioremap_quiet(struct platform_device *pdev, const char *name,
> +               const char *dbgname);
>  void msm_writel(u32 data, void __iomem *addr);
>  u32 msm_readl(const void __iomem *addr);
>
> --
> 2.26.2
>

Patch

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 680527e28d09..a4ab802fee6d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -45,20 +45,6 @@ 
 static int dpu_kms_hw_init(struct msm_kms *kms);
 static void _dpu_kms_mmu_destroy(struct dpu_kms *dpu_kms);
 
-static unsigned long dpu_iomap_size(struct platform_device *pdev,
-				    const char *name)
-{
-	struct resource *res;
-
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
-	if (!res) {
-		DRM_ERROR("failed to get memory resource: %s\n", name);
-		return 0;
-	}
-
-	return resource_size(res);
-}
-
 #ifdef CONFIG_DEBUG_FS
 static int _dpu_danger_signal_status(struct seq_file *s,
 		bool danger_status)
@@ -844,7 +830,6 @@  static int dpu_kms_hw_init(struct msm_kms *kms)
 		goto error;
 	}
 	DRM_DEBUG("mapped dpu address space @%pK\n", dpu_kms->mmio);
-	dpu_kms->mmio_len = dpu_iomap_size(dpu_kms->pdev, "mdp");
 
 	dpu_kms->vbif[VBIF_RT] = msm_ioremap(dpu_kms->pdev, "vbif", "vbif");
 	if (IS_ERR(dpu_kms->vbif[VBIF_RT])) {
@@ -853,22 +838,16 @@  static int dpu_kms_hw_init(struct msm_kms *kms)
 		dpu_kms->vbif[VBIF_RT] = NULL;
 		goto error;
 	}
-	dpu_kms->vbif_len[VBIF_RT] = dpu_iomap_size(dpu_kms->pdev, "vbif");
 	dpu_kms->vbif[VBIF_NRT] = msm_ioremap(dpu_kms->pdev, "vbif_nrt", "vbif_nrt");
 	if (IS_ERR(dpu_kms->vbif[VBIF_NRT])) {
 		dpu_kms->vbif[VBIF_NRT] = NULL;
 		DPU_DEBUG("VBIF NRT is not defined");
-	} else {
-		dpu_kms->vbif_len[VBIF_NRT] = dpu_iomap_size(dpu_kms->pdev,
-							     "vbif_nrt");
 	}
 
 	dpu_kms->reg_dma = msm_ioremap(dpu_kms->pdev, "regdma", "regdma");
 	if (IS_ERR(dpu_kms->reg_dma)) {
 		dpu_kms->reg_dma = NULL;
 		DPU_DEBUG("REG_DMA is not defined");
-	} else {
-		dpu_kms->reg_dma_len = dpu_iomap_size(dpu_kms->pdev, "regdma");
 	}
 
 	pm_runtime_get_sync(&dpu_kms->pdev->dev);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
index 4e32d040f1e6..13034cdb8665 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
@@ -100,7 +100,6 @@  struct dpu_kms {
 
 	/* io/register spaces: */
 	void __iomem *mmio, *vbif[VBIF_MAX], *reg_dma;
-	unsigned long mmio_len, vbif_len[VBIF_MAX], reg_dma_len;
 
 	struct regulator *vdd;
 	struct regulator *mmagic;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index 80d3cfc14007..9f20b84d5c0a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
@@ -37,7 +37,6 @@  struct dpu_mdss_hw_init_handler {
 struct dpu_mdss {
 	struct msm_mdss base;
 	void __iomem *mmio;
-	unsigned long mmio_len;
 	struct dss_module_power mp;
 	struct dpu_irq_controller irq_controller;
 	struct icc_path *path[2];
@@ -292,7 +291,6 @@  int dpu_mdss_init(struct drm_device *dev)
 {
 	struct platform_device *pdev = to_platform_device(dev->dev);
 	struct msm_drm_private *priv = dev->dev_private;
-	struct resource *res;
 	struct dpu_mdss *dpu_mdss;
 	struct dss_module_power *mp;
 	int ret = 0;
@@ -308,13 +306,6 @@  int dpu_mdss_init(struct drm_device *dev)
 
 	DRM_DEBUG("mapped mdss address space @%pK\n", dpu_mdss->mmio);
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mdss");
-	if (!res) {
-		DRM_ERROR("failed to get memory resource for mdss\n");
-		return -ENOMEM;
-	}
-	dpu_mdss->mmio_len = resource_size(res);
-
 	ret = dpu_mdss_parse_data_bus_icc_path(dev, dpu_mdss);
 	if (ret)
 		return ret;