To let the probe function bail early if any of the resources is unavailable, move resource allocattion from kms_init directly to the probe callback. While we are at it, replace irq_of_parse_and_map() with platform_get_irq().
Signed-off-by: Dmitry Baryshkov dmitry.baryshkov@linaro.org --- drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c | 107 +++++++++++------------ 1 file changed, 51 insertions(+), 56 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c index 41dc60784847..6499713eccf6 100644 --- a/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_kms.c @@ -139,8 +139,6 @@ static void mdp4_destroy(struct msm_kms *kms) pm_runtime_disable(dev);
mdp_kms_destroy(&mdp4_kms->base); - - kfree(mdp4_kms); }
static const struct mdp_kms_funcs kms_funcs = { @@ -383,57 +381,27 @@ static int mdp4_kms_init(struct drm_device *dev) { struct platform_device *pdev = to_platform_device(dev->dev); struct msm_drm_private *priv = dev->dev_private; - struct mdp4_kms *mdp4_kms; + struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(priv->kms)); struct msm_kms *kms = NULL; struct iommu_domain *iommu; struct msm_gem_address_space *aspace; - int irq, ret; + int ret; u32 major, minor; unsigned long max_clk;
/* TODO: Chips that aren't apq8064 have a 200 Mhz max_clk */ max_clk = 266667000;
- mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL); - if (!mdp4_kms) { - DRM_DEV_ERROR(dev->dev, "failed to allocate kms\n"); - return -ENOMEM; - } - ret = mdp_kms_init(&mdp4_kms->base, &kms_funcs); if (ret) { DRM_DEV_ERROR(dev->dev, "failed to init kms\n"); goto fail; }
- priv->kms = &mdp4_kms->base.base; kms = priv->kms;
mdp4_kms->dev = dev;
- mdp4_kms->mmio = msm_ioremap(pdev, NULL); - if (IS_ERR(mdp4_kms->mmio)) { - ret = PTR_ERR(mdp4_kms->mmio); - goto fail; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - ret = irq; - DRM_DEV_ERROR(dev->dev, "failed to get irq: %d\n", ret); - goto fail; - } - - kms->irq = irq; - - /* NOTE: driver for this regulator still missing upstream.. use - * _get_exclusive() and ignore the error if it does not exist - * (and hope that the bootloader left it on for us) - */ - mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd"); - if (IS_ERR(mdp4_kms->vdd)) - mdp4_kms->vdd = NULL; - if (mdp4_kms->vdd) { ret = regulator_enable(mdp4_kms->vdd); if (ret) { @@ -442,24 +410,6 @@ static int mdp4_kms_init(struct drm_device *dev) } }
- mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk"); - if (IS_ERR(mdp4_kms->clk)) { - DRM_DEV_ERROR(dev->dev, "failed to get core_clk\n"); - ret = PTR_ERR(mdp4_kms->clk); - goto fail; - } - - mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk"); - if (IS_ERR(mdp4_kms->pclk)) - mdp4_kms->pclk = NULL; - - mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk"); - if (IS_ERR(mdp4_kms->axi_clk)) { - DRM_DEV_ERROR(dev->dev, "failed to get axi_clk\n"); - ret = PTR_ERR(mdp4_kms->axi_clk); - goto fail; - } - clk_set_rate(mdp4_kms->clk, max_clk);
read_mdp_hw_revision(mdp4_kms, &major, &minor); @@ -474,10 +424,9 @@ static int mdp4_kms_init(struct drm_device *dev) mdp4_kms->rev = minor;
if (mdp4_kms->rev >= 2) { - mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk"); - if (IS_ERR(mdp4_kms->lut_clk)) { + if (!mdp4_kms->lut_clk) { DRM_DEV_ERROR(dev->dev, "failed to get lut_clk\n"); - ret = PTR_ERR(mdp4_kms->lut_clk); + ret = -ENODEV; goto fail; } clk_set_rate(mdp4_kms->lut_clk, max_clk); @@ -560,7 +509,53 @@ static const struct dev_pm_ops mdp4_pm_ops = {
static int mdp4_probe(struct platform_device *pdev) { - return msm_drv_probe(&pdev->dev, mdp4_kms_init, NULL); + struct device *dev = &pdev->dev; + struct mdp4_kms *mdp4_kms; + int irq; + + mdp4_kms = devm_kzalloc(dev, sizeof(*mdp4_kms), GFP_KERNEL); + if (!mdp4_kms) + return dev_err_probe(dev, -ENOMEM, "failed to allocate kms\n"); + + mdp4_kms->mmio = msm_ioremap(pdev, NULL); + if (IS_ERR(mdp4_kms->mmio)) + return PTR_ERR(mdp4_kms->mmio); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return dev_err_probe(dev, irq, "failed to get irq\n"); + + mdp4_kms->base.base.irq = irq; + + /* NOTE: driver for this regulator still missing upstream.. use + * _get_exclusive() and ignore the error if it does not exist + * (and hope that the bootloader left it on for us) + */ + mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd"); + if (IS_ERR(mdp4_kms->vdd)) + mdp4_kms->vdd = NULL; + + mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk"); + if (IS_ERR(mdp4_kms->clk)) + return dev_err_probe(dev, PTR_ERR(mdp4_kms->clk), "failed to get core_clk\n"); + + mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk"); + if (IS_ERR(mdp4_kms->pclk)) + mdp4_kms->pclk = NULL; + + mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk"); + if (IS_ERR(mdp4_kms->axi_clk)) + return dev_err_probe(dev, PTR_ERR(mdp4_kms->axi_clk), "failed to get axi_clk\n"); + + /* + * This is required for revn >= 2. Handle errors here and let the kms + * init bail out if the clock is not provided. + */ + mdp4_kms->lut_clk = devm_clk_get_optional(&pdev->dev, "lut_clk"); + if (IS_ERR(mdp4_kms->lut_clk)) + return dev_err_probe(dev, PTR_ERR(mdp4_kms->lut_clk), "failed to get lut_clk\n"); + + return msm_drv_probe(&pdev->dev, mdp4_kms_init, &mdp4_kms->base.base); }
static int mdp4_remove(struct platform_device *pdev)