From 311fc3f773578617b4947c5fabc95bbbd262186f Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Fri, 24 Mar 2023 15:45:50 +0100 Subject: [PATCH] drm/vc4: hvs: Change prototype of __vc4_hvs_alloc to pass registers The BCM2712 HVS has registers to report the size of the various SRAM the driver uses, and their size actually differ depending on the stepping. The initialisation of the memory pools happen in the __vc4_hvs_alloc() function that also allocates the main HVS structure, that will then hold the pointer to the memory mapping of the registers. This creates some kind of circular dependency that we can break by passing the mapping pointer as an argument for __vc4_hvs_alloc() to use to query to get the SRAM sizes and initialise the memory pools accordingly. Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/tests/vc4_mock.c | 2 +- drivers/gpu/drm/vc4/vc4_drv.h | 4 +++- drivers/gpu/drm/vc4/vc4_hvs.c | 16 ++++++++++------ 3 files changed, 14 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/vc4/tests/vc4_mock.c b/drivers/gpu/drm/vc4/tests/vc4_mock.c index be9ff34..5c54503 100644 --- a/drivers/gpu/drm/vc4/tests/vc4_mock.c +++ b/drivers/gpu/drm/vc4/tests/vc4_mock.c @@ -180,7 +180,7 @@ static struct vc4_dev *__mock_device(struct kunit *test, enum vc4_gen gen) vc4->dev = dev; vc4->gen = gen; - vc4->hvs = __vc4_hvs_alloc(vc4, NULL); + vc4->hvs = __vc4_hvs_alloc(vc4, NULL, NULL); KUNIT_ASSERT_NOT_ERR_OR_NULL(test, vc4->hvs); drm = &vc4->base; diff --git a/drivers/gpu/drm/vc4/vc4_drv.h b/drivers/gpu/drm/vc4/vc4_drv.h index 549b4ff..921bd44 100644 --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -1047,7 +1047,9 @@ void vc4_irq_reset(struct drm_device *dev); /* vc4_hvs.c */ extern struct platform_driver vc4_hvs_driver; -struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, struct platform_device *pdev); +struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, + void __iomem *regs, + struct platform_device *pdev); void vc4_hvs_stop_channel(struct vc4_hvs *hvs, unsigned int output); int vc4_hvs_get_fifo_from_output(struct vc4_hvs *hvs, unsigned int output); u8 vc4_hvs_get_fifo_frame_count(struct vc4_hvs *hvs, unsigned int fifo); diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c index 79d99c0..9dd85d4 100644 --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -1238,7 +1238,9 @@ int vc4_hvs_debugfs_init(struct drm_minor *minor) return 0; } -struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, struct platform_device *pdev) +struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, + void __iomem *regs, + struct platform_device *pdev) { struct drm_device *drm = &vc4->base; struct vc4_hvs *hvs; @@ -1248,6 +1250,7 @@ struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, struct platform_device *pde return ERR_PTR(-ENOMEM); hvs->vc4 = vc4; + hvs->regs = regs; hvs->pdev = pdev; spin_lock_init(&hvs->mm_lock); @@ -1446,16 +1449,17 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) struct drm_device *drm = dev_get_drvdata(master); struct vc4_dev *vc4 = to_vc4_dev(drm); struct vc4_hvs *hvs = NULL; + void __iomem *regs; int ret; - hvs = __vc4_hvs_alloc(vc4, NULL); + regs = vc4_ioremap_regs(pdev, 0); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + hvs = __vc4_hvs_alloc(vc4, regs, pdev); if (IS_ERR(hvs)) return PTR_ERR(hvs); - hvs->regs = vc4_ioremap_regs(pdev, 0); - if (IS_ERR(hvs->regs)) - return PTR_ERR(hvs->regs); - hvs->regset.base = hvs->regs; hvs->regset.regs = vc4_hvs_regs; hvs->regset.nregs = ARRAY_SIZE(vc4_hvs_regs); -- 2.7.4