diff options
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_disp_ccorr.c')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_disp_ccorr.c | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c new file mode 100644 index 000000000000..141cb36b9c07 --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_disp_ccorr.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021 MediaTek Inc. + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> +#include <linux/soc/mediatek/mtk-cmdq.h> + +#include "mtk_disp_drv.h" +#include "mtk_drm_crtc.h" +#include "mtk_drm_ddp_comp.h" + +#define DISP_CCORR_EN 0x0000 +#define CCORR_EN BIT(0) +#define DISP_CCORR_CFG 0x0020 +#define CCORR_RELAY_MODE BIT(0) +#define CCORR_ENGINE_EN BIT(1) +#define CCORR_GAMMA_OFF BIT(2) +#define CCORR_WGAMUT_SRC_CLIP BIT(3) +#define DISP_CCORR_SIZE 0x0030 +#define DISP_CCORR_COEF_0 0x0080 +#define DISP_CCORR_COEF_1 0x0084 +#define DISP_CCORR_COEF_2 0x0088 +#define DISP_CCORR_COEF_3 0x008C +#define DISP_CCORR_COEF_4 0x0090 + +struct mtk_disp_ccorr_data { + u32 matrix_bits; +}; + +/** + * struct mtk_disp_ccorr - DISP_CCORR driver structure + * @ddp_comp - structure containing type enum and hardware resources + * @crtc - associated crtc to report irq events to + */ +struct mtk_disp_ccorr { + struct clk *clk; + void __iomem *regs; + struct cmdq_client_reg cmdq_reg; + const struct mtk_disp_ccorr_data *data; +}; + +int mtk_ccorr_clk_enable(struct device *dev) +{ + struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); + + return clk_prepare_enable(ccorr->clk); +} + +void mtk_ccorr_clk_disable(struct device *dev) +{ + struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); + + clk_disable_unprepare(ccorr->clk); +} + +void mtk_ccorr_config(struct device *dev, unsigned int w, + unsigned int h, unsigned int vrefresh, + unsigned int bpc, struct cmdq_pkt *cmdq_pkt) +{ + struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); + + mtk_ddp_write(cmdq_pkt, w << 16 | h, &ccorr->cmdq_reg, ccorr->regs, + DISP_CCORR_SIZE); + mtk_ddp_write(cmdq_pkt, CCORR_ENGINE_EN, &ccorr->cmdq_reg, ccorr->regs, + DISP_CCORR_CFG); +} + +void mtk_ccorr_start(struct device *dev) +{ + struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); + + writel(CCORR_EN, ccorr->regs + DISP_CCORR_EN); +} + +void mtk_ccorr_stop(struct device *dev) +{ + struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); + + writel_relaxed(0x0, ccorr->regs + DISP_CCORR_EN); +} + +/* Converts a DRM S31.32 value to the HW S1.n format. */ +static u16 mtk_ctm_s31_32_to_s1_n(u64 in, u32 n) +{ + u16 r; + + /* Sign bit. */ + r = in & BIT_ULL(63) ? BIT(n + 1) : 0; + + if ((in & GENMASK_ULL(62, 33)) > 0) { + /* identity value 0x100000000 -> 0x400(mt8183), */ + /* identity value 0x100000000 -> 0x800(mt8192), */ + /* if bigger this, set it to max 0x7ff. */ + r |= GENMASK(n, 0); + } else { + /* take the n+1 most important bits. */ + r |= (in >> (32 - n)) & GENMASK(n, 0); + } + + return r; +} + +void mtk_ccorr_ctm_set(struct device *dev, struct drm_crtc_state *state) +{ + struct mtk_disp_ccorr *ccorr = dev_get_drvdata(dev); + struct drm_property_blob *blob = state->ctm; + struct drm_color_ctm *ctm; + const u64 *input; + uint16_t coeffs[9] = { 0 }; + int i; + struct cmdq_pkt *cmdq_pkt = NULL; + u32 matrix_bits = ccorr->data->matrix_bits; + + if (!blob) + return; + + ctm = (struct drm_color_ctm *)blob->data; + input = ctm->matrix; + + for (i = 0; i < ARRAY_SIZE(coeffs); i++) + coeffs[i] = mtk_ctm_s31_32_to_s1_n(input[i], matrix_bits); + + mtk_ddp_write(cmdq_pkt, coeffs[0] << 16 | coeffs[1], + &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_0); + mtk_ddp_write(cmdq_pkt, coeffs[2] << 16 | coeffs[3], + &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_1); + mtk_ddp_write(cmdq_pkt, coeffs[4] << 16 | coeffs[5], + &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_2); + mtk_ddp_write(cmdq_pkt, coeffs[6] << 16 | coeffs[7], + &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_3); + mtk_ddp_write(cmdq_pkt, coeffs[8] << 16, + &ccorr->cmdq_reg, ccorr->regs, DISP_CCORR_COEF_4); +} + +static int mtk_disp_ccorr_bind(struct device *dev, struct device *master, + void *data) +{ + return 0; +} + +static void mtk_disp_ccorr_unbind(struct device *dev, struct device *master, + void *data) +{ +} + +static const struct component_ops mtk_disp_ccorr_component_ops = { + .bind = mtk_disp_ccorr_bind, + .unbind = mtk_disp_ccorr_unbind, +}; + +static int mtk_disp_ccorr_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_disp_ccorr *priv; + struct resource *res; + int ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->clk = devm_clk_get(dev, NULL); + if (IS_ERR(priv->clk)) { + dev_err(dev, "failed to get ccorr clk\n"); + return PTR_ERR(priv->clk); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + priv->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(priv->regs)) { + dev_err(dev, "failed to ioremap ccorr\n"); + return PTR_ERR(priv->regs); + } + +#if IS_REACHABLE(CONFIG_MTK_CMDQ) + ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); + if (ret) + dev_dbg(dev, "get mediatek,gce-client-reg fail!\n"); +#endif + + priv->data = of_device_get_match_data(dev); + platform_set_drvdata(pdev, priv); + + ret = component_add(dev, &mtk_disp_ccorr_component_ops); + if (ret) + dev_err(dev, "Failed to add component: %d\n", ret); + + return ret; +} + +static int mtk_disp_ccorr_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &mtk_disp_ccorr_component_ops); + + return 0; +} + +static const struct mtk_disp_ccorr_data mt8183_ccorr_driver_data = { + .matrix_bits = 10, +}; + +static const struct of_device_id mtk_disp_ccorr_driver_dt_match[] = { + { .compatible = "mediatek,mt8183-disp-ccorr", + .data = &mt8183_ccorr_driver_data}, + {}, +}; +MODULE_DEVICE_TABLE(of, mtk_disp_ccorr_driver_dt_match); + +struct platform_driver mtk_disp_ccorr_driver = { + .probe = mtk_disp_ccorr_probe, + .remove = mtk_disp_ccorr_remove, + .driver = { + .name = "mediatek-disp-ccorr", + .owner = THIS_MODULE, + .of_match_table = mtk_disp_ccorr_driver_dt_match, + }, +}; |