diff options
Diffstat (limited to 'drivers/gpu/drm/arm/malidp_drv.c')
| -rw-r--r-- | drivers/gpu/drm/arm/malidp_drv.c | 128 |
1 files changed, 106 insertions, 22 deletions
diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c index 5442baf310c8..e954c22bb974 100644 --- a/drivers/gpu/drm/arm/malidp_drv.c +++ b/drivers/gpu/drm/arm/malidp_drv.c @@ -13,9 +13,11 @@ #include <linux/module.h> #include <linux/clk.h> #include <linux/component.h> +#include <linux/console.h> #include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/of_reserved_mem.h> +#include <linux/pm_runtime.h> #include <drm/drmP.h> #include <drm/drm_atomic.h> @@ -91,6 +93,8 @@ static void malidp_atomic_commit_tail(struct drm_atomic_state *state) { struct drm_device *drm = state->dev; + pm_runtime_get_sync(drm->dev); + drm_atomic_helper_commit_modeset_disables(drm, state); drm_atomic_helper_commit_planes(drm, state, 0); @@ -101,6 +105,8 @@ static void malidp_atomic_commit_tail(struct drm_atomic_state *state) drm_atomic_helper_wait_for_vblanks(drm, state); + pm_runtime_put(drm->dev); + drm_atomic_helper_cleanup_planes(drm, state); } @@ -283,6 +289,37 @@ static bool malidp_has_sufficient_address_space(const struct resource *res, #define MAX_OUTPUT_CHANNELS 3 +static int malidp_runtime_pm_suspend(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct malidp_drm *malidp = drm->dev_private; + struct malidp_hw_device *hwdev = malidp->dev; + + /* we can only suspend if the hardware is in config mode */ + WARN_ON(!hwdev->in_config_mode(hwdev)); + + hwdev->pm_suspended = true; + clk_disable_unprepare(hwdev->mclk); + clk_disable_unprepare(hwdev->aclk); + clk_disable_unprepare(hwdev->pclk); + + return 0; +} + +static int malidp_runtime_pm_resume(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct malidp_drm *malidp = drm->dev_private; + struct malidp_hw_device *hwdev = malidp->dev; + + clk_prepare_enable(hwdev->pclk); + clk_prepare_enable(hwdev->aclk); + clk_prepare_enable(hwdev->mclk); + hwdev->pm_suspended = false; + + return 0; +} + static int malidp_bind(struct device *dev) { struct resource *res; @@ -311,7 +348,6 @@ static int malidp_bind(struct device *dev) memcpy(hwdev, of_device_get_match_data(dev), sizeof(*hwdev)); malidp->dev = hwdev; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hwdev->regs = devm_ioremap_resource(dev, res); if (IS_ERR(hwdev->regs)) @@ -344,14 +380,17 @@ static int malidp_bind(struct device *dev) goto alloc_fail; } - /* Enable APB clock in order to get access to the registers */ - clk_prepare_enable(hwdev->pclk); - /* - * Enable AXI clock and main clock so that prefetch can start once - * the registers are set - */ - clk_prepare_enable(hwdev->aclk); - clk_prepare_enable(hwdev->mclk); + drm->dev_private = malidp; + dev_set_drvdata(dev, drm); + + /* Enable power management */ + pm_runtime_enable(dev); + + /* Resume device to enable the clocks */ + if (pm_runtime_enabled(dev)) + pm_runtime_get_sync(dev); + else + malidp_runtime_pm_resume(dev); dev_id = of_match_device(malidp_drm_of_match, dev); if (!dev_id) { @@ -391,14 +430,12 @@ static int malidp_bind(struct device *dev) out_depth = (out_depth << 8) | (output_width[i] & 0xf); malidp_hw_write(hwdev, out_depth, hwdev->map.out_depth_base); - drm->dev_private = malidp; - dev_set_drvdata(dev, drm); atomic_set(&malidp->config_valid, 0); init_waitqueue_head(&malidp->wq); ret = malidp_init(drm); if (ret < 0) - goto init_fail; + goto query_hw_fail; /* Set the CRTC's port so that the encoder component can find it */ malidp->crtc.port = of_graph_get_port_by_id(dev->of_node, 0); @@ -420,6 +457,7 @@ static int malidp_bind(struct device *dev) DRM_ERROR("failed to initialise vblank\n"); goto vblank_fail; } + pm_runtime_put(dev); drm_mode_config_reset(drm); @@ -445,7 +483,9 @@ register_fail: drm_fbdev_cma_fini(malidp->fbdev); malidp->fbdev = NULL; } + drm_kms_helper_poll_fini(drm); fbdev_fail: + pm_runtime_get_sync(dev); drm_vblank_cleanup(drm); vblank_fail: malidp_se_irq_fini(drm); @@ -457,13 +497,14 @@ bind_fail: of_node_put(malidp->crtc.port); malidp->crtc.port = NULL; malidp_fini(drm); -init_fail: +query_hw_fail: + pm_runtime_put(dev); + if (pm_runtime_enabled(dev)) + pm_runtime_disable(dev); + else + malidp_runtime_pm_suspend(dev); drm->dev_private = NULL; dev_set_drvdata(dev, NULL); -query_hw_fail: - clk_disable_unprepare(hwdev->mclk); - clk_disable_unprepare(hwdev->aclk); - clk_disable_unprepare(hwdev->pclk); drm_dev_unref(drm); alloc_fail: of_reserved_mem_device_release(dev); @@ -475,7 +516,6 @@ static void malidp_unbind(struct device *dev) { struct drm_device *drm = dev_get_drvdata(dev); struct malidp_drm *malidp = drm->dev_private; - struct malidp_hw_device *hwdev = malidp->dev; drm_dev_unregister(drm); if (malidp->fbdev) { @@ -483,18 +523,21 @@ static void malidp_unbind(struct device *dev) malidp->fbdev = NULL; } drm_kms_helper_poll_fini(drm); + pm_runtime_get_sync(dev); + drm_vblank_cleanup(drm); malidp_se_irq_fini(drm); malidp_de_irq_fini(drm); - drm_vblank_cleanup(drm); component_unbind_all(dev, drm); of_node_put(malidp->crtc.port); malidp->crtc.port = NULL; malidp_fini(drm); + pm_runtime_put(dev); + if (pm_runtime_enabled(dev)) + pm_runtime_disable(dev); + else + malidp_runtime_pm_suspend(dev); drm->dev_private = NULL; dev_set_drvdata(dev, NULL); - clk_disable_unprepare(hwdev->mclk); - clk_disable_unprepare(hwdev->aclk); - clk_disable_unprepare(hwdev->pclk); drm_dev_unref(drm); of_reserved_mem_device_release(dev); } @@ -537,11 +580,52 @@ static int malidp_platform_remove(struct platform_device *pdev) return 0; } +static int __maybe_unused malidp_pm_suspend(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct malidp_drm *malidp = drm->dev_private; + + drm_kms_helper_poll_disable(drm); + console_lock(); + drm_fbdev_cma_set_suspend(malidp->fbdev, 1); + console_unlock(); + malidp->pm_state = drm_atomic_helper_suspend(drm); + if (IS_ERR(malidp->pm_state)) { + console_lock(); + drm_fbdev_cma_set_suspend(malidp->fbdev, 0); + console_unlock(); + drm_kms_helper_poll_enable(drm); + return PTR_ERR(malidp->pm_state); + } + + return 0; +} + +static int __maybe_unused malidp_pm_resume(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + struct malidp_drm *malidp = drm->dev_private; + + drm_atomic_helper_resume(drm, malidp->pm_state); + console_lock(); + drm_fbdev_cma_set_suspend(malidp->fbdev, 0); + console_unlock(); + drm_kms_helper_poll_enable(drm); + + return 0; +} + +static const struct dev_pm_ops malidp_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend, malidp_pm_resume) \ + SET_RUNTIME_PM_OPS(malidp_runtime_pm_suspend, malidp_runtime_pm_resume, NULL) +}; + static struct platform_driver malidp_platform_driver = { .probe = malidp_platform_probe, .remove = malidp_platform_remove, .driver = { .name = "mali-dp", + .pm = &malidp_pm_ops, .of_match_table = malidp_drm_of_match, }, }; |