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Fri, 31 Jul 2020 08:19:16 +0000 From: Laurentiu Palcu To: Philipp Zabel , David Airlie , Daniel Vetter , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Lucas Stach Cc: lukas@mntmn.com, agx@sigxcpu.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, laurentiu.palcu@oss.nxp.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH v9 2/5] drm/imx: Add initial support for DCSS on iMX8MQ Date: Fri, 31 Jul 2020 11:18:30 +0300 Message-Id: <20200731081836.3048-3-laurentiu.palcu@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200731081836.3048-1-laurentiu.palcu@oss.nxp.com> References: <20200731081836.3048-1-laurentiu.palcu@oss.nxp.com> Content-Type: text/plain; charset="us-ascii" X-ClientProxiedBy: AM0PR06CA0141.eurprd06.prod.outlook.com (2603:10a6:208:ab::46) To VI1PR0402MB3902.eurprd04.prod.outlook.com (2603:10a6:803:22::27) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from fsr-ub1864-141.ea.freescale.net (83.217.231.2) by AM0PR06CA0141.eurprd06.prod.outlook.com (2603:10a6:208:ab::46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3239.18 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: RXY2fm5nKK+fKBu/voeXAtBFb1dgy0m1/ZP8cGrtXrkHg7ZNmszIen1BncNEKBzLMq9TRmZpDuiCxiprFXoYwNx1GgLN5tq93u4PFa80RhsYQfM0JVpHcTVpEc6QP+VJrF2uNVXMeP5w7rTs/XC0unB1fLBXe/DvZ327SExsMEjYMpNHe5oIB/SNhQ0elFG5s+c1faXaMUrFp0EGY6tT2aAH9AVAQ+17gdFJLxyRubRj427y8oBIKtTEQfr+RuNQbKmx0UQ+7I+4AG2jWXa+2s2fsd1544A8a+/L3JAYfbSV9eBZcl3n8ddFEKYZveVwFK+dtjCt1SpLFOTHQmczKeOcDWIHyFo2ObUREZBGhMEmC0UNl+TsZhm21dPd+ZvStb9Wz6tLgzFxUy3mISNoyZQxhptRQ8YSG1rHqg/c4+bH+gL76JC3JFOWAX6RIi3EROZ27oU/X208NIYHnOYYxh6BcupP/8gLmxwHQIXK4HJ2A6W5Lp0l27mqI9Fa1S0OjTM4V+Lc9I6YL/YzB8bgM1L7ZPrzVE0zPiDaHMu8rAs1Bt1GzDE/9x8/42QchbVWvgsx3H7ulXznCSjI0OfiClqDCCZGge+dtU5hn6yJLVLHwJWtxkUxUbj0xrjMHgVAApwDU4Ak/AevD7voy13tfg== X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 60bd9d1a-890f-45ab-27cf-08d8352a69e8 X-MS-Exchange-CrossTenant-AuthSource: VI1PR0402MB3902.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Jul 2020 08:19:15.8853 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Q4+sqidzbCSxRDqqRrY8dj4a+P8gt7I3IfKAXYXBzxC+HfufJv76RL8JIe0LzzKu3cUtqERFtPXwZb4Bp0/K8g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB3024 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Laurentiu Palcu This adds initial support for iMX8MQ's Display Controller Subsystem (DCSS). Some of its capabilities include: * 4K@60fps; * HDR10; * one graphics and 2 video pipelines; * on-the-fly decompression of compressed video and graphics; The reference manual can be found here: https://www.nxp.com/webapp/Download?colCode=IMX8MDQLQRM The current patch adds only basic functionality: one primary plane for graphics, linear, tiled and super-tiled buffers support (no graphics decompression yet), no HDR10 and no video planes. Video planes support and HDR10 will be added in subsequent patches once per-plane de-gamma/CSC/gamma support is in. Signed-off-by: Laurentiu Palcu Reviewed-by: Lucas Stach --- drivers/gpu/drm/imx/Kconfig | 2 + drivers/gpu/drm/imx/Makefile | 1 + drivers/gpu/drm/imx/dcss/Kconfig | 9 + drivers/gpu/drm/imx/dcss/Makefile | 6 + drivers/gpu/drm/imx/dcss/dcss-blkctl.c | 70 +++ drivers/gpu/drm/imx/dcss/dcss-crtc.c | 219 +++++++ drivers/gpu/drm/imx/dcss/dcss-ctxld.c | 424 +++++++++++++ drivers/gpu/drm/imx/dcss/dcss-dev.c | 314 ++++++++++ drivers/gpu/drm/imx/dcss/dcss-dev.h | 177 ++++++ drivers/gpu/drm/imx/dcss/dcss-dpr.c | 562 +++++++++++++++++ drivers/gpu/drm/imx/dcss/dcss-drv.c | 138 +++++ drivers/gpu/drm/imx/dcss/dcss-dtg.c | 409 ++++++++++++ drivers/gpu/drm/imx/dcss/dcss-kms.c | 177 ++++++ drivers/gpu/drm/imx/dcss/dcss-kms.h | 43 ++ drivers/gpu/drm/imx/dcss/dcss-plane.c | 405 ++++++++++++ drivers/gpu/drm/imx/dcss/dcss-scaler.c | 826 +++++++++++++++++++++++++ drivers/gpu/drm/imx/dcss/dcss-ss.c | 180 ++++++ 17 files changed, 3962 insertions(+) create mode 100644 drivers/gpu/drm/imx/dcss/Kconfig create mode 100644 drivers/gpu/drm/imx/dcss/Makefile create mode 100644 drivers/gpu/drm/imx/dcss/dcss-blkctl.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-crtc.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-ctxld.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-dev.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-dev.h create mode 100644 drivers/gpu/drm/imx/dcss/dcss-dpr.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-drv.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-dtg.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-kms.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-kms.h create mode 100644 drivers/gpu/drm/imx/dcss/dcss-plane.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-scaler.c create mode 100644 drivers/gpu/drm/imx/dcss/dcss-ss.c diff --git a/drivers/gpu/drm/imx/Kconfig b/drivers/gpu/drm/imx/Kconfig index 207bf7409dfb..6231048aa5aa 100644 --- a/drivers/gpu/drm/imx/Kconfig +++ b/drivers/gpu/drm/imx/Kconfig @@ -39,3 +39,5 @@ config DRM_IMX_HDMI depends on DRM_IMX help Choose this if you want to use HDMI on i.MX6. + +source "drivers/gpu/drm/imx/dcss/Kconfig" diff --git a/drivers/gpu/drm/imx/Makefile b/drivers/gpu/drm/imx/Makefile index 21cdcc2faabc..b644deffe948 100644 --- a/drivers/gpu/drm/imx/Makefile +++ b/drivers/gpu/drm/imx/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_DRM_IMX_TVE) += imx-tve.o obj-$(CONFIG_DRM_IMX_LDB) += imx-ldb.o obj-$(CONFIG_DRM_IMX_HDMI) += dw_hdmi-imx.o +obj-$(CONFIG_DRM_IMX_DCSS) += dcss/ diff --git a/drivers/gpu/drm/imx/dcss/Kconfig b/drivers/gpu/drm/imx/dcss/Kconfig new file mode 100644 index 000000000000..69860de8861f --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/Kconfig @@ -0,0 +1,9 @@ +config DRM_IMX_DCSS + tristate "i.MX8MQ DCSS" + select IMX_IRQSTEER + select DRM_KMS_CMA_HELPER + select VIDEOMODE_HELPERS + depends on DRM && ARCH_MXC + help + Choose this if you have a NXP i.MX8MQ based system and want to use the + Display Controller Subsystem. This option enables DCSS support. diff --git a/drivers/gpu/drm/imx/dcss/Makefile b/drivers/gpu/drm/imx/dcss/Makefile new file mode 100644 index 000000000000..8c7c8da42792 --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/Makefile @@ -0,0 +1,6 @@ +imx-dcss-objs := dcss-drv.o dcss-dev.o dcss-blkctl.o dcss-ctxld.o dcss-dtg.o \ + dcss-ss.o dcss-dpr.o dcss-scaler.o dcss-kms.o dcss-crtc.o \ + dcss-plane.o + +obj-$(CONFIG_DRM_IMX_DCSS) += imx-dcss.o + diff --git a/drivers/gpu/drm/imx/dcss/dcss-blkctl.c b/drivers/gpu/drm/imx/dcss/dcss-blkctl.c new file mode 100644 index 000000000000..c9b54bb2692d --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-blkctl.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include +#include +#include + +#include "dcss-dev.h" + +#define DCSS_BLKCTL_RESET_CTRL 0x00 +#define B_CLK_RESETN BIT(0) +#define APB_CLK_RESETN BIT(1) +#define P_CLK_RESETN BIT(2) +#define RTR_CLK_RESETN BIT(4) +#define DCSS_BLKCTL_CONTROL0 0x10 +#define HDMI_MIPI_CLK_SEL BIT(0) +#define DISPMIX_REFCLK_SEL_POS 4 +#define DISPMIX_REFCLK_SEL_MASK GENMASK(5, 4) +#define DISPMIX_PIXCLK_SEL BIT(8) +#define HDMI_SRC_SECURE_EN BIT(16) + +struct dcss_blkctl { + struct dcss_dev *dcss; + void __iomem *base_reg; +}; + +void dcss_blkctl_cfg(struct dcss_blkctl *blkctl) +{ + if (blkctl->dcss->hdmi_output) + dcss_writel(0, blkctl->base_reg + DCSS_BLKCTL_CONTROL0); + else + dcss_writel(DISPMIX_PIXCLK_SEL, + blkctl->base_reg + DCSS_BLKCTL_CONTROL0); + + dcss_set(B_CLK_RESETN | APB_CLK_RESETN | P_CLK_RESETN | RTR_CLK_RESETN, + blkctl->base_reg + DCSS_BLKCTL_RESET_CTRL); +} + +int dcss_blkctl_init(struct dcss_dev *dcss, unsigned long blkctl_base) +{ + struct dcss_blkctl *blkctl; + + blkctl = kzalloc(sizeof(*blkctl), GFP_KERNEL); + if (!blkctl) + return -ENOMEM; + + blkctl->base_reg = ioremap(blkctl_base, SZ_4K); + if (!blkctl->base_reg) { + dev_err(dcss->dev, "unable to remap BLK CTRL base\n"); + kfree(blkctl); + return -ENOMEM; + } + + dcss->blkctl = blkctl; + blkctl->dcss = dcss; + + dcss_blkctl_cfg(blkctl); + + return 0; +} + +void dcss_blkctl_exit(struct dcss_blkctl *blkctl) +{ + if (blkctl->base_reg) + iounmap(blkctl->base_reg); + + kfree(blkctl); +} diff --git a/drivers/gpu/drm/imx/dcss/dcss-crtc.c b/drivers/gpu/drm/imx/dcss/dcss-crtc.c new file mode 100644 index 000000000000..36abff0890b2 --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-crtc.c @@ -0,0 +1,219 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include +#include +#include +#include + +#include "dcss-dev.h" +#include "dcss-kms.h" + +static int dcss_enable_vblank(struct drm_crtc *crtc) +{ + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = crtc->dev->dev_private; + + dcss_dtg_vblank_irq_enable(dcss->dtg, true); + + dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, true); + + enable_irq(dcss_crtc->irq); + + return 0; +} + +static void dcss_disable_vblank(struct drm_crtc *crtc) +{ + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + + disable_irq_nosync(dcss_crtc->irq); + + dcss_dtg_vblank_irq_enable(dcss->dtg, false); + + if (dcss_crtc->disable_ctxld_kick_irq) + dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, false); +} + +static const struct drm_crtc_funcs dcss_crtc_funcs = { + .set_config = drm_atomic_helper_set_config, + .destroy = drm_crtc_cleanup, + .page_flip = drm_atomic_helper_page_flip, + .reset = drm_atomic_helper_crtc_reset, + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, + .enable_vblank = dcss_enable_vblank, + .disable_vblank = dcss_disable_vblank, +}; + +static void dcss_crtc_atomic_begin(struct drm_crtc *crtc, + struct drm_crtc_state *old_crtc_state) +{ + drm_crtc_vblank_on(crtc); +} + +static void dcss_crtc_atomic_flush(struct drm_crtc *crtc, + struct drm_crtc_state *old_crtc_state) +{ + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + + spin_lock_irq(&crtc->dev->event_lock); + if (crtc->state->event) { + WARN_ON(drm_crtc_vblank_get(crtc)); + drm_crtc_arm_vblank_event(crtc, crtc->state->event); + crtc->state->event = NULL; + } + spin_unlock_irq(&crtc->dev->event_lock); + + if (dcss_dtg_is_enabled(dcss->dtg)) + dcss_ctxld_enable(dcss->ctxld); +} + +static void dcss_crtc_atomic_enable(struct drm_crtc *crtc, + struct drm_crtc_state *old_crtc_state) +{ + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + struct drm_display_mode *mode = &crtc->state->adjusted_mode; + struct drm_display_mode *old_mode = &old_crtc_state->adjusted_mode; + struct videomode vm; + + drm_display_mode_to_videomode(mode, &vm); + + pm_runtime_get_sync(dcss->dev); + + vm.pixelclock = mode->crtc_clock * 1000; + + dcss_ss_subsam_set(dcss->ss); + dcss_dtg_css_set(dcss->dtg); + + if (!drm_mode_equal(mode, old_mode) || !old_crtc_state->active) { + dcss_dtg_sync_set(dcss->dtg, &vm); + dcss_ss_sync_set(dcss->ss, &vm, + mode->flags & DRM_MODE_FLAG_PHSYNC, + mode->flags & DRM_MODE_FLAG_PVSYNC); + } + + dcss_enable_dtg_and_ss(dcss); + + dcss_ctxld_enable(dcss->ctxld); + + /* Allow CTXLD kick interrupt to be disabled when VBLANK is disabled. */ + dcss_crtc->disable_ctxld_kick_irq = true; +} + +static void dcss_crtc_atomic_disable(struct drm_crtc *crtc, + struct drm_crtc_state *old_crtc_state) +{ + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + struct drm_display_mode *mode = &crtc->state->adjusted_mode; + struct drm_display_mode *old_mode = &old_crtc_state->adjusted_mode; + + drm_atomic_helper_disable_planes_on_crtc(old_crtc_state, false); + + spin_lock_irq(&crtc->dev->event_lock); + if (crtc->state->event) { + drm_crtc_send_vblank_event(crtc, crtc->state->event); + crtc->state->event = NULL; + } + spin_unlock_irq(&crtc->dev->event_lock); + + dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, true); + + reinit_completion(&dcss->disable_completion); + + dcss_disable_dtg_and_ss(dcss); + + dcss_ctxld_enable(dcss->ctxld); + + if (!drm_mode_equal(mode, old_mode) || !crtc->state->active) + if (!wait_for_completion_timeout(&dcss->disable_completion, + msecs_to_jiffies(100))) + dev_err(dcss->dev, "Shutting off DTG timed out.\n"); + + /* + * Do not shut off CTXLD kick interrupt when shutting VBLANK off. It + * will be needed to commit the last changes, before going to suspend. + */ + dcss_crtc->disable_ctxld_kick_irq = false; + + drm_crtc_vblank_off(crtc); + + pm_runtime_mark_last_busy(dcss->dev); + pm_runtime_put_autosuspend(dcss->dev); +} + +static const struct drm_crtc_helper_funcs dcss_helper_funcs = { + .atomic_begin = dcss_crtc_atomic_begin, + .atomic_flush = dcss_crtc_atomic_flush, + .atomic_enable = dcss_crtc_atomic_enable, + .atomic_disable = dcss_crtc_atomic_disable, +}; + +static irqreturn_t dcss_crtc_irq_handler(int irq, void *dev_id) +{ + struct dcss_crtc *dcss_crtc = dev_id; + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + + if (!dcss_dtg_vblank_irq_valid(dcss->dtg)) + return IRQ_NONE; + + if (dcss_ctxld_is_flushed(dcss->ctxld)) + drm_crtc_handle_vblank(&dcss_crtc->base); + + dcss_dtg_vblank_irq_clear(dcss->dtg); + + return IRQ_HANDLED; +} + +int dcss_crtc_init(struct dcss_crtc *crtc, struct drm_device *drm) +{ + struct dcss_dev *dcss = drm->dev_private; + struct platform_device *pdev = to_platform_device(dcss->dev); + int ret; + + crtc->plane[0] = dcss_plane_init(drm, drm_crtc_mask(&crtc->base), + DRM_PLANE_TYPE_PRIMARY, 0); + if (IS_ERR(crtc->plane[0])) + return PTR_ERR(crtc->plane[0]); + + crtc->base.port = dcss->of_port; + + drm_crtc_helper_add(&crtc->base, &dcss_helper_funcs); + ret = drm_crtc_init_with_planes(drm, &crtc->base, &crtc->plane[0]->base, + NULL, &dcss_crtc_funcs, NULL); + if (ret) { + dev_err(dcss->dev, "failed to init crtc\n"); + return ret; + } + + crtc->irq = platform_get_irq_byname(pdev, "vblank"); + if (crtc->irq < 0) + return crtc->irq; + + ret = request_irq(crtc->irq, dcss_crtc_irq_handler, + 0, "dcss_drm", crtc); + if (ret) { + dev_err(dcss->dev, "irq request failed with %d.\n", ret); + return ret; + } + + disable_irq(crtc->irq); + + return 0; +} + +void dcss_crtc_deinit(struct dcss_crtc *crtc, struct drm_device *drm) +{ + free_irq(crtc->irq, crtc); +} diff --git a/drivers/gpu/drm/imx/dcss/dcss-ctxld.c b/drivers/gpu/drm/imx/dcss/dcss-ctxld.c new file mode 100644 index 000000000000..3a84cb3209c4 --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-ctxld.c @@ -0,0 +1,424 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include +#include +#include +#include +#include + +#include "dcss-dev.h" + +#define DCSS_CTXLD_CONTROL_STATUS 0x0 +#define CTXLD_ENABLE BIT(0) +#define ARB_SEL BIT(1) +#define RD_ERR_EN BIT(2) +#define DB_COMP_EN BIT(3) +#define SB_HP_COMP_EN BIT(4) +#define SB_LP_COMP_EN BIT(5) +#define DB_PEND_SB_REC_EN BIT(6) +#define SB_PEND_DISP_ACTIVE_EN BIT(7) +#define AHB_ERR_EN BIT(8) +#define RD_ERR BIT(16) +#define DB_COMP BIT(17) +#define SB_HP_COMP BIT(18) +#define SB_LP_COMP BIT(19) +#define DB_PEND_SB_REC BIT(20) +#define SB_PEND_DISP_ACTIVE BIT(21) +#define AHB_ERR BIT(22) +#define DCSS_CTXLD_DB_BASE_ADDR 0x10 +#define DCSS_CTXLD_DB_COUNT 0x14 +#define DCSS_CTXLD_SB_BASE_ADDR 0x18 +#define DCSS_CTXLD_SB_COUNT 0x1C +#define SB_HP_COUNT_POS 0 +#define SB_HP_COUNT_MASK 0xffff +#define SB_LP_COUNT_POS 16 +#define SB_LP_COUNT_MASK 0xffff0000 +#define DCSS_AHB_ERR_ADDR 0x20 + +#define CTXLD_IRQ_COMPLETION (DB_COMP | SB_HP_COMP | SB_LP_COMP) +#define CTXLD_IRQ_ERROR (RD_ERR | DB_PEND_SB_REC | AHB_ERR) + +/* The following sizes are in context loader entries, 8 bytes each. */ +#define CTXLD_DB_CTX_ENTRIES 1024 /* max 65536 */ +#define CTXLD_SB_LP_CTX_ENTRIES 10240 /* max 65536 */ +#define CTXLD_SB_HP_CTX_ENTRIES 20000 /* max 65536 */ +#define CTXLD_SB_CTX_ENTRIES (CTXLD_SB_LP_CTX_ENTRIES + \ + CTXLD_SB_HP_CTX_ENTRIES) + +/* Sizes, in entries, of the DB, SB_HP and SB_LP context regions. */ +static u16 dcss_ctxld_ctx_size[3] = { + CTXLD_DB_CTX_ENTRIES, + CTXLD_SB_HP_CTX_ENTRIES, + CTXLD_SB_LP_CTX_ENTRIES +}; + +/* this represents an entry in the context loader map */ +struct dcss_ctxld_item { + u32 val; + u32 ofs; +}; + +#define CTX_ITEM_SIZE sizeof(struct dcss_ctxld_item) + +struct dcss_ctxld { + struct device *dev; + void __iomem *ctxld_reg; + int irq; + bool irq_en; + + struct dcss_ctxld_item *db[2]; + struct dcss_ctxld_item *sb_hp[2]; + struct dcss_ctxld_item *sb_lp[2]; + + dma_addr_t db_paddr[2]; + dma_addr_t sb_paddr[2]; + + u16 ctx_size[2][3]; /* holds the sizes of DB, SB_HP and SB_LP ctx */ + u8 current_ctx; + + bool in_use; + bool armed; + + spinlock_t lock; /* protects concurent access to private data */ +}; + +static irqreturn_t dcss_ctxld_irq_handler(int irq, void *data) +{ + struct dcss_ctxld *ctxld = data; + struct dcss_dev *dcss = dcss_drv_dev_to_dcss(ctxld->dev); + u32 irq_status; + + irq_status = dcss_readl(ctxld->ctxld_reg + DCSS_CTXLD_CONTROL_STATUS); + + if (irq_status & CTXLD_IRQ_COMPLETION && + !(irq_status & CTXLD_ENABLE) && ctxld->in_use) { + ctxld->in_use = false; + + if (dcss && dcss->disable_callback) + dcss->disable_callback(dcss); + } else if (irq_status & CTXLD_IRQ_ERROR) { + /* + * Except for throwing an error message and clearing the status + * register, there's not much we can do here. + */ + dev_err(ctxld->dev, "ctxld: error encountered: %08x\n", + irq_status); + dev_err(ctxld->dev, "ctxld: db=%d, sb_hp=%d, sb_lp=%d\n", + ctxld->ctx_size[ctxld->current_ctx ^ 1][CTX_DB], + ctxld->ctx_size[ctxld->current_ctx ^ 1][CTX_SB_HP], + ctxld->ctx_size[ctxld->current_ctx ^ 1][CTX_SB_LP]); + } + + dcss_clr(irq_status & (CTXLD_IRQ_ERROR | CTXLD_IRQ_COMPLETION), + ctxld->ctxld_reg + DCSS_CTXLD_CONTROL_STATUS); + + return IRQ_HANDLED; +} + +static int dcss_ctxld_irq_config(struct dcss_ctxld *ctxld, + struct platform_device *pdev) +{ + int ret; + + ctxld->irq = platform_get_irq_byname(pdev, "ctxld"); + if (ctxld->irq < 0) + return ctxld->irq; + + ret = request_irq(ctxld->irq, dcss_ctxld_irq_handler, + 0, "dcss_ctxld", ctxld); + if (ret) { + dev_err(ctxld->dev, "ctxld: irq request failed.\n"); + return ret; + } + + ctxld->irq_en = true; + + return 0; +} + +static void dcss_ctxld_hw_cfg(struct dcss_ctxld *ctxld) +{ + dcss_writel(RD_ERR_EN | SB_HP_COMP_EN | + DB_PEND_SB_REC_EN | AHB_ERR_EN | RD_ERR | AHB_ERR, + ctxld->ctxld_reg + DCSS_CTXLD_CONTROL_STATUS); +} + +static void dcss_ctxld_free_ctx(struct dcss_ctxld *ctxld) +{ + struct dcss_ctxld_item *ctx; + int i; + + for (i = 0; i < 2; i++) { + if (ctxld->db[i]) { + dma_free_coherent(ctxld->dev, + CTXLD_DB_CTX_ENTRIES * sizeof(*ctx), + ctxld->db[i], ctxld->db_paddr[i]); + ctxld->db[i] = NULL; + ctxld->db_paddr[i] = 0; + } + + if (ctxld->sb_hp[i]) { + dma_free_coherent(ctxld->dev, + CTXLD_SB_CTX_ENTRIES * sizeof(*ctx), + ctxld->sb_hp[i], ctxld->sb_paddr[i]); + ctxld->sb_hp[i] = NULL; + ctxld->sb_paddr[i] = 0; + } + } +} + +static int dcss_ctxld_alloc_ctx(struct dcss_ctxld *ctxld) +{ + struct dcss_ctxld_item *ctx; + int i; + + for (i = 0; i < 2; i++) { + ctx = dma_alloc_coherent(ctxld->dev, + CTXLD_DB_CTX_ENTRIES * sizeof(*ctx), + &ctxld->db_paddr[i], GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctxld->db[i] = ctx; + + ctx = dma_alloc_coherent(ctxld->dev, + CTXLD_SB_CTX_ENTRIES * sizeof(*ctx), + &ctxld->sb_paddr[i], GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctxld->sb_hp[i] = ctx; + ctxld->sb_lp[i] = ctx + CTXLD_SB_HP_CTX_ENTRIES; + } + + return 0; +} + +int dcss_ctxld_init(struct dcss_dev *dcss, unsigned long ctxld_base) +{ + struct dcss_ctxld *ctxld; + int ret; + + ctxld = kzalloc(sizeof(*ctxld), GFP_KERNEL); + if (!ctxld) + return -ENOMEM; + + dcss->ctxld = ctxld; + ctxld->dev = dcss->dev; + + spin_lock_init(&ctxld->lock); + + ret = dcss_ctxld_alloc_ctx(ctxld); + if (ret) { + dev_err(dcss->dev, "ctxld: cannot allocate context memory.\n"); + goto err; + } + + ctxld->ctxld_reg = ioremap(ctxld_base, SZ_4K); + if (!ctxld->ctxld_reg) { + dev_err(dcss->dev, "ctxld: unable to remap ctxld base\n"); + ret = -ENOMEM; + goto err; + } + + ret = dcss_ctxld_irq_config(ctxld, to_platform_device(dcss->dev)); + if (ret) + goto err_irq; + + dcss_ctxld_hw_cfg(ctxld); + + return 0; + +err_irq: + iounmap(ctxld->ctxld_reg); + +err: + dcss_ctxld_free_ctx(ctxld); + kfree(ctxld); + + return ret; +} + +void dcss_ctxld_exit(struct dcss_ctxld *ctxld) +{ + free_irq(ctxld->irq, ctxld); + + if (ctxld->ctxld_reg) + iounmap(ctxld->ctxld_reg); + + dcss_ctxld_free_ctx(ctxld); + kfree(ctxld); +} + +static int dcss_ctxld_enable_locked(struct dcss_ctxld *ctxld) +{ + int curr_ctx = ctxld->current_ctx; + u32 db_base, sb_base, sb_count; + u32 sb_hp_cnt, sb_lp_cnt, db_cnt; + struct dcss_dev *dcss = dcss_drv_dev_to_dcss(ctxld->dev); + + if (!dcss) + return 0; + + dcss_dpr_write_sysctrl(dcss->dpr); + + dcss_scaler_write_sclctrl(dcss->scaler); + + sb_hp_cnt = ctxld->ctx_size[curr_ctx][CTX_SB_HP]; + sb_lp_cnt = ctxld->ctx_size[curr_ctx][CTX_SB_LP]; + db_cnt = ctxld->ctx_size[curr_ctx][CTX_DB]; + + /* make sure SB_LP context area comes after SB_HP */ + if (sb_lp_cnt && + ctxld->sb_lp[curr_ctx] != ctxld->sb_hp[curr_ctx] + sb_hp_cnt) { + struct dcss_ctxld_item *sb_lp_adjusted; + + sb_lp_adjusted = ctxld->sb_hp[curr_ctx] + sb_hp_cnt; + + memcpy(sb_lp_adjusted, ctxld->sb_lp[curr_ctx], + sb_lp_cnt * CTX_ITEM_SIZE); + } + + db_base = db_cnt ? ctxld->db_paddr[curr_ctx] : 0; + + dcss_writel(db_base, ctxld->ctxld_reg + DCSS_CTXLD_DB_BASE_ADDR); + dcss_writel(db_cnt, ctxld->ctxld_reg + DCSS_CTXLD_DB_COUNT); + + if (sb_hp_cnt) + sb_count = ((sb_hp_cnt << SB_HP_COUNT_POS) & SB_HP_COUNT_MASK) | + ((sb_lp_cnt << SB_LP_COUNT_POS) & SB_LP_COUNT_MASK); + else + sb_count = (sb_lp_cnt << SB_HP_COUNT_POS) & SB_HP_COUNT_MASK; + + sb_base = sb_count ? ctxld->sb_paddr[curr_ctx] : 0; + + dcss_writel(sb_base, ctxld->ctxld_reg + DCSS_CTXLD_SB_BASE_ADDR); + dcss_writel(sb_count, ctxld->ctxld_reg + DCSS_CTXLD_SB_COUNT); + + /* enable the context loader */ + dcss_set(CTXLD_ENABLE, ctxld->ctxld_reg + DCSS_CTXLD_CONTROL_STATUS); + + ctxld->in_use = true; + + /* + * Toggle the current context to the alternate one so that any updates + * in the modules' settings take place there. + */ + ctxld->current_ctx ^= 1; + + ctxld->ctx_size[ctxld->current_ctx][CTX_DB] = 0; + ctxld->ctx_size[ctxld->current_ctx][CTX_SB_HP] = 0; + ctxld->ctx_size[ctxld->current_ctx][CTX_SB_LP] = 0; + + return 0; +} + +int dcss_ctxld_enable(struct dcss_ctxld *ctxld) +{ + spin_lock_irq(&ctxld->lock); + ctxld->armed = true; + spin_unlock_irq(&ctxld->lock); + + return 0; +} + +void dcss_ctxld_kick(struct dcss_ctxld *ctxld) +{ + unsigned long flags; + + spin_lock_irqsave(&ctxld->lock, flags); + if (ctxld->armed && !ctxld->in_use) { + ctxld->armed = false; + dcss_ctxld_enable_locked(ctxld); + } + spin_unlock_irqrestore(&ctxld->lock, flags); +} + +void dcss_ctxld_write_irqsafe(struct dcss_ctxld *ctxld, u32 ctx_id, u32 val, + u32 reg_ofs) +{ + int curr_ctx = ctxld->current_ctx; + struct dcss_ctxld_item *ctx[] = { + [CTX_DB] = ctxld->db[curr_ctx], + [CTX_SB_HP] = ctxld->sb_hp[curr_ctx], + [CTX_SB_LP] = ctxld->sb_lp[curr_ctx] + }; + int item_idx = ctxld->ctx_size[curr_ctx][ctx_id]; + + if (item_idx + 1 > dcss_ctxld_ctx_size[ctx_id]) { + WARN_ON(1); + return; + } + + ctx[ctx_id][item_idx].val = val; + ctx[ctx_id][item_idx].ofs = reg_ofs; + ctxld->ctx_size[curr_ctx][ctx_id] += 1; +} + +void dcss_ctxld_write(struct dcss_ctxld *ctxld, u32 ctx_id, + u32 val, u32 reg_ofs) +{ + spin_lock_irq(&ctxld->lock); + dcss_ctxld_write_irqsafe(ctxld, ctx_id, val, reg_ofs); + spin_unlock_irq(&ctxld->lock); +} + +bool dcss_ctxld_is_flushed(struct dcss_ctxld *ctxld) +{ + return ctxld->ctx_size[ctxld->current_ctx][CTX_DB] == 0 && + ctxld->ctx_size[ctxld->current_ctx][CTX_SB_HP] == 0 && + ctxld->ctx_size[ctxld->current_ctx][CTX_SB_LP] == 0; +} + +int dcss_ctxld_resume(struct dcss_ctxld *ctxld) +{ + dcss_ctxld_hw_cfg(ctxld); + + if (!ctxld->irq_en) { + enable_irq(ctxld->irq); + ctxld->irq_en = true; + } + + return 0; +} + +int dcss_ctxld_suspend(struct dcss_ctxld *ctxld) +{ + int ret = 0; + unsigned long timeout = jiffies + msecs_to_jiffies(500); + + if (!dcss_ctxld_is_flushed(ctxld)) { + dcss_ctxld_kick(ctxld); + + while (!time_after(jiffies, timeout) && ctxld->in_use) + msleep(20); + + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + } + + spin_lock_irq(&ctxld->lock); + + if (ctxld->irq_en) { + disable_irq_nosync(ctxld->irq); + ctxld->irq_en = false; + } + + /* reset context region and sizes */ + ctxld->current_ctx = 0; + ctxld->ctx_size[0][CTX_DB] = 0; + ctxld->ctx_size[0][CTX_SB_HP] = 0; + ctxld->ctx_size[0][CTX_SB_LP] = 0; + + spin_unlock_irq(&ctxld->lock); + + return ret; +} + +void dcss_ctxld_assert_locked(struct dcss_ctxld *ctxld) +{ + lockdep_assert_held(&ctxld->lock); +} diff --git a/drivers/gpu/drm/imx/dcss/dcss-dev.c b/drivers/gpu/drm/imx/dcss/dcss-dev.c new file mode 100644 index 000000000000..83a4840435cf --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-dev.c @@ -0,0 +1,314 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include +#include +#include +#include +#include +#include + +#include "dcss-dev.h" + +static void dcss_clocks_enable(struct dcss_dev *dcss) +{ + clk_prepare_enable(dcss->axi_clk); + clk_prepare_enable(dcss->apb_clk); + clk_prepare_enable(dcss->rtrm_clk); + clk_prepare_enable(dcss->dtrc_clk); + clk_prepare_enable(dcss->pix_clk); +} + +static void dcss_clocks_disable(struct dcss_dev *dcss) +{ + clk_disable_unprepare(dcss->pix_clk); + clk_disable_unprepare(dcss->dtrc_clk); + clk_disable_unprepare(dcss->rtrm_clk); + clk_disable_unprepare(dcss->apb_clk); + clk_disable_unprepare(dcss->axi_clk); +} + +static void dcss_disable_dtg_and_ss_cb(void *data) +{ + struct dcss_dev *dcss = data; + + dcss->disable_callback = NULL; + + dcss_ss_shutoff(dcss->ss); + dcss_dtg_shutoff(dcss->dtg); + + complete(&dcss->disable_completion); +} + +void dcss_disable_dtg_and_ss(struct dcss_dev *dcss) +{ + dcss->disable_callback = dcss_disable_dtg_and_ss_cb; +} + +void dcss_enable_dtg_and_ss(struct dcss_dev *dcss) +{ + if (dcss->disable_callback) + dcss->disable_callback = NULL; + + dcss_dtg_enable(dcss->dtg); + dcss_ss_enable(dcss->ss); +} + +static int dcss_submodules_init(struct dcss_dev *dcss) +{ + int ret = 0; + u32 base_addr = dcss->start_addr; + const struct dcss_type_data *devtype = dcss->devtype; + + dcss_clocks_enable(dcss); + + ret = dcss_blkctl_init(dcss, base_addr + devtype->blkctl_ofs); + if (ret) + return ret; + + ret = dcss_ctxld_init(dcss, base_addr + devtype->ctxld_ofs); + if (ret) + goto ctxld_err; + + ret = dcss_dtg_init(dcss, base_addr + devtype->dtg_ofs); + if (ret) + goto dtg_err; + + ret = dcss_ss_init(dcss, base_addr + devtype->ss_ofs); + if (ret) + goto ss_err; + + ret = dcss_dpr_init(dcss, base_addr + devtype->dpr_ofs); + if (ret) + goto dpr_err; + + ret = dcss_scaler_init(dcss, base_addr + devtype->scaler_ofs); + if (ret) + goto scaler_err; + + dcss_clocks_disable(dcss); + + return 0; + +scaler_err: + dcss_dpr_exit(dcss->dpr); + +dpr_err: + dcss_ss_exit(dcss->ss); + +ss_err: + dcss_dtg_exit(dcss->dtg); + +dtg_err: + dcss_ctxld_exit(dcss->ctxld); + +ctxld_err: + dcss_blkctl_exit(dcss->blkctl); + + dcss_clocks_disable(dcss); + + return ret; +} + +static void dcss_submodules_stop(struct dcss_dev *dcss) +{ + dcss_clocks_enable(dcss); + dcss_scaler_exit(dcss->scaler); + dcss_dpr_exit(dcss->dpr); + dcss_ss_exit(dcss->ss); + dcss_dtg_exit(dcss->dtg); + dcss_ctxld_exit(dcss->ctxld); + dcss_blkctl_exit(dcss->blkctl); + dcss_clocks_disable(dcss); +} + +static int dcss_clks_init(struct dcss_dev *dcss) +{ + int i; + struct { + const char *id; + struct clk **clk; + } clks[] = { + {"apb", &dcss->apb_clk}, + {"axi", &dcss->axi_clk}, + {"pix", &dcss->pix_clk}, + {"rtrm", &dcss->rtrm_clk}, + {"dtrc", &dcss->dtrc_clk}, + }; + + for (i = 0; i < ARRAY_SIZE(clks); i++) { + *clks[i].clk = devm_clk_get(dcss->dev, clks[i].id); + if (IS_ERR(*clks[i].clk)) { + dev_err(dcss->dev, "failed to get %s clock\n", + clks[i].id); + return PTR_ERR(*clks[i].clk); + } + } + + return 0; +} + +static void dcss_clks_release(struct dcss_dev *dcss) +{ + devm_clk_put(dcss->dev, dcss->dtrc_clk); + devm_clk_put(dcss->dev, dcss->rtrm_clk); + devm_clk_put(dcss->dev, dcss->pix_clk); + devm_clk_put(dcss->dev, dcss->axi_clk); + devm_clk_put(dcss->dev, dcss->apb_clk); +} + +struct dcss_dev *dcss_dev_create(struct device *dev, bool hdmi_output) +{ + struct platform_device *pdev = to_platform_device(dev); + int ret; + struct resource *res; + struct dcss_dev *dcss; + const struct dcss_type_data *devtype; + + devtype = of_device_get_match_data(dev); + if (!devtype) { + dev_err(dev, "no device match found\n"); + return ERR_PTR(-ENODEV); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(dev, "cannot get memory resource\n"); + return ERR_PTR(-EINVAL); + } + + dcss = kzalloc(sizeof(*dcss), GFP_KERNEL); + if (!dcss) + return ERR_PTR(-ENOMEM); + + dcss->dev = dev; + dcss->devtype = devtype; + dcss->hdmi_output = hdmi_output; + + ret = dcss_clks_init(dcss); + if (ret) { + dev_err(dev, "clocks initialization failed\n"); + goto err; + } + + dcss->of_port = of_graph_get_port_by_id(dev->of_node, 0); + if (!dcss->of_port) { + dev_err(dev, "no port@0 node in %s\n", dev->of_node->full_name); + ret = -ENODEV; + goto clks_err; + } + + dcss->start_addr = res->start; + + ret = dcss_submodules_init(dcss); + if (ret) { + dev_err(dev, "submodules initialization failed\n"); + goto clks_err; + } + + init_completion(&dcss->disable_completion); + + pm_runtime_set_autosuspend_delay(dev, 100); + pm_runtime_use_autosuspend(dev); + pm_runtime_set_suspended(dev); + pm_runtime_allow(dev); + pm_runtime_enable(dev); + + return dcss; + +clks_err: + dcss_clks_release(dcss); + +err: + kfree(dcss); + + return ERR_PTR(ret); +} + +void dcss_dev_destroy(struct dcss_dev *dcss) +{ + if (!pm_runtime_suspended(dcss->dev)) { + dcss_ctxld_suspend(dcss->ctxld); + dcss_clocks_disable(dcss); + } + + pm_runtime_disable(dcss->dev); + + dcss_submodules_stop(dcss); + + dcss_clks_release(dcss); + + kfree(dcss); +} + +#ifdef CONFIG_PM_SLEEP +int dcss_dev_suspend(struct device *dev) +{ + struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dev); + int ret; + + drm_mode_config_helper_suspend(dcss_drv_dev_to_drm(dev)); + + if (pm_runtime_suspended(dev)) + return 0; + + ret = dcss_ctxld_suspend(dcss->ctxld); + if (ret) + return ret; + + dcss_clocks_disable(dcss); + + return 0; +} + +int dcss_dev_resume(struct device *dev) +{ + struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dev); + + if (pm_runtime_suspended(dev)) { + drm_mode_config_helper_resume(dcss_drv_dev_to_drm(dev)); + return 0; + } + + dcss_clocks_enable(dcss); + + dcss_blkctl_cfg(dcss->blkctl); + + dcss_ctxld_resume(dcss->ctxld); + + drm_mode_config_helper_resume(dcss_drv_dev_to_drm(dev)); + + return 0; +} +#endif /* CONFIG_PM_SLEEP */ + +#ifdef CONFIG_PM +int dcss_dev_runtime_suspend(struct device *dev) +{ + struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dev); + int ret; + + ret = dcss_ctxld_suspend(dcss->ctxld); + if (ret) + return ret; + + dcss_clocks_disable(dcss); + + return 0; +} + +int dcss_dev_runtime_resume(struct device *dev) +{ + struct dcss_dev *dcss = dcss_drv_dev_to_dcss(dev); + + dcss_clocks_enable(dcss); + + dcss_blkctl_cfg(dcss->blkctl); + + dcss_ctxld_resume(dcss->ctxld); + + return 0; +} +#endif /* CONFIG_PM */ diff --git a/drivers/gpu/drm/imx/dcss/dcss-dev.h b/drivers/gpu/drm/imx/dcss/dcss-dev.h new file mode 100644 index 000000000000..c642ae17837f --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-dev.h @@ -0,0 +1,177 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright 2019 NXP. + */ + +#ifndef __DCSS_PRV_H__ +#define __DCSS_PRV_H__ + +#include +#include +#include