From e75de2a5fd951a0244b2000dc2ad3922b0ab0f5e Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Wed, 23 Nov 2022 16:00:53 +0100 Subject: [PATCH] drm/vc4: hvs: Provide a function to initialize the HVS structure We'll need to initialize the HVS structure without a backing device to create a mock we'll use for testing. Split the structure initialization part into a separate function. Reviewed-by: Javier Martinez Canillas Signed-off-by: Maxime Ripard --- drivers/gpu/drm/vc4/vc4_drv.h | 1 + drivers/gpu/drm/vc4/vc4_hvs.c | 73 +++++++++++++++++++++-------------- 2 files changed, 44 insertions(+), 30 deletions(-) --- a/drivers/gpu/drm/vc4/vc4_drv.h +++ b/drivers/gpu/drm/vc4/vc4_drv.h @@ -1036,6 +1036,7 @@ void vc4_irq_reset(struct drm_device *de /* vc4_hvs.c */ extern struct platform_driver vc4_hvs_driver; +struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, 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); --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -1010,6 +1010,46 @@ int vc4_hvs_debugfs_init(struct drm_mino return 0; } +struct vc4_hvs *__vc4_hvs_alloc(struct vc4_dev *vc4, struct platform_device *pdev) +{ + struct drm_device *drm = &vc4->base; + struct vc4_hvs *hvs; + + hvs = drmm_kzalloc(drm, sizeof(*hvs), GFP_KERNEL); + if (!hvs) + return ERR_PTR(-ENOMEM); + + hvs->vc4 = vc4; + hvs->pdev = pdev; + + spin_lock_init(&hvs->mm_lock); + + /* Set up the HVS display list memory manager. We never + * overwrite the setup from the bootloader (just 128b out of + * our 16K), since we don't want to scramble the screen when + * transitioning from the firmware's boot setup to runtime. + */ + drm_mm_init(&hvs->dlist_mm, + HVS_BOOTLOADER_DLIST_END, + (SCALER_DLIST_SIZE >> 2) - HVS_BOOTLOADER_DLIST_END); + + /* Set up the HVS LBM memory manager. We could have some more + * complicated data structure that allowed reuse of LBM areas + * between planes when they don't overlap on the screen, but + * for now we just allocate globally. + */ + if (!vc4->is_vc5) + /* 48k words of 2x12-bit pixels */ + drm_mm_init(&hvs->lbm_mm, 0, 48 * 1024); + else + /* 60k words of 4x12-bit pixels */ + drm_mm_init(&hvs->lbm_mm, 0, 60 * 1024); + + vc4->hvs = hvs; + + return hvs; +} + static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) { struct platform_device *pdev = to_platform_device(dev); @@ -1020,11 +1060,9 @@ static int vc4_hvs_bind(struct device *d u32 dispctrl; u32 reg, top; - hvs = drmm_kzalloc(drm, sizeof(*hvs), GFP_KERNEL); - if (!hvs) - return -ENOMEM; - hvs->vc4 = vc4; - hvs->pdev = pdev; + hvs = __vc4_hvs_alloc(vc4, NULL); + if (IS_ERR(hvs)) + return PTR_ERR(hvs); hvs->regs = vc4_ioremap_regs(pdev, 0); if (IS_ERR(hvs->regs)) @@ -1077,29 +1115,6 @@ static int vc4_hvs_bind(struct device *d else hvs->dlist = hvs->regs + SCALER5_DLIST_START; - spin_lock_init(&hvs->mm_lock); - - /* Set up the HVS display list memory manager. We never - * overwrite the setup from the bootloader (just 128b out of - * our 16K), since we don't want to scramble the screen when - * transitioning from the firmware's boot setup to runtime. - */ - drm_mm_init(&hvs->dlist_mm, - HVS_BOOTLOADER_DLIST_END, - (SCALER_DLIST_SIZE >> 2) - HVS_BOOTLOADER_DLIST_END); - - /* Set up the HVS LBM memory manager. We could have some more - * complicated data structure that allowed reuse of LBM areas - * between planes when they don't overlap on the screen, but - * for now we just allocate globally. - */ - if (!vc4->is_vc5) - /* 48k words of 2x12-bit pixels */ - drm_mm_init(&hvs->lbm_mm, 0, 48 * 1024); - else - /* 60k words of 4x12-bit pixels */ - drm_mm_init(&hvs->lbm_mm, 0, 60 * 1024); - /* Upload filter kernels. We only have the one for now, so we * keep it around for the lifetime of the driver. */ @@ -1109,8 +1124,6 @@ static int vc4_hvs_bind(struct device *d if (ret) return ret; - vc4->hvs = hvs; - reg = HVS_READ(SCALER_DISPECTRL); reg &= ~SCALER_DISPECTRL_DSP2_MUX_MASK; HVS_WRITE(SCALER_DISPECTRL,