diff options
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_disp_aal.c')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_disp_aal.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_aal.c b/drivers/gpu/drm/mediatek/mtk_disp_aal.c new file mode 100644 index 000000000000..abc9e5525d03 --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_disp_aal.c @@ -0,0 +1,226 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021 MediaTek Inc. + */ + +#include <linux/bitfield.h> +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/soc/mediatek/mtk-cmdq.h> + +#include "mtk_crtc.h" +#include "mtk_ddp_comp.h" +#include "mtk_disp_drv.h" +#include "mtk_drm_drv.h" + +#define DISP_AAL_EN 0x0000 +#define AAL_EN BIT(0) +#define DISP_AAL_CFG 0x0020 +#define AAL_RELAY_MODE BIT(0) +#define AAL_GAMMA_LUT_EN BIT(1) +#define DISP_AAL_SIZE 0x0030 +#define DISP_AAL_SIZE_HSIZE GENMASK(28, 16) +#define DISP_AAL_SIZE_VSIZE GENMASK(12, 0) +#define DISP_AAL_OUTPUT_SIZE 0x04d8 +#define DISP_AAL_GAMMA_LUT 0x0700 +#define DISP_AAL_GAMMA_LUT_R GENMASK(29, 20) +#define DISP_AAL_GAMMA_LUT_G GENMASK(19, 10) +#define DISP_AAL_GAMMA_LUT_B GENMASK(9, 0) +#define DISP_AAL_LUT_BITS 10 +#define DISP_AAL_LUT_SIZE 512 + +struct mtk_disp_aal_data { + bool has_gamma; +}; + + /** + * struct mtk_disp_aal - Display Adaptive Ambient Light driver structure + * @clk: clock for DISP_AAL controller + * @regs: MMIO registers base + * @cmdq_reg: CMDQ Client register + * @data: platform specific data for DISP_AAL + */ +struct mtk_disp_aal { + struct clk *clk; + void __iomem *regs; + struct cmdq_client_reg cmdq_reg; + const struct mtk_disp_aal_data *data; +}; + +int mtk_aal_clk_enable(struct device *dev) +{ + struct mtk_disp_aal *aal = dev_get_drvdata(dev); + + return clk_prepare_enable(aal->clk); +} + +void mtk_aal_clk_disable(struct device *dev) +{ + struct mtk_disp_aal *aal = dev_get_drvdata(dev); + + clk_disable_unprepare(aal->clk); +} + +void mtk_aal_config(struct device *dev, unsigned int w, + unsigned int h, unsigned int vrefresh, + unsigned int bpc, struct cmdq_pkt *cmdq_pkt) +{ + struct mtk_disp_aal *aal = dev_get_drvdata(dev); + u32 sz; + + sz = FIELD_PREP(DISP_AAL_SIZE_HSIZE, w); + sz |= FIELD_PREP(DISP_AAL_SIZE_VSIZE, h); + + mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_SIZE); + mtk_ddp_write(cmdq_pkt, sz, &aal->cmdq_reg, aal->regs, DISP_AAL_OUTPUT_SIZE); +} + +/** + * mtk_aal_gamma_get_lut_size() - Get gamma LUT size for AAL + * @dev: Pointer to struct device + * + * Return: 0 if gamma control not supported in AAL or gamma LUT size + */ +unsigned int mtk_aal_gamma_get_lut_size(struct device *dev) +{ + struct mtk_disp_aal *aal = dev_get_drvdata(dev); + + if (aal->data && aal->data->has_gamma) + return DISP_AAL_LUT_SIZE; + return 0; +} + +void mtk_aal_gamma_set(struct device *dev, struct drm_crtc_state *state) +{ + struct mtk_disp_aal *aal = dev_get_drvdata(dev); + struct drm_color_lut *lut; + unsigned int i; + u32 cfg_val; + + /* If gamma is not supported in AAL, go out immediately */ + if (!(aal->data && aal->data->has_gamma)) + return; + + /* Also, if there's no gamma lut there's nothing to do here. */ + if (!state->gamma_lut) + return; + + lut = (struct drm_color_lut *)state->gamma_lut->data; + for (i = 0; i < DISP_AAL_LUT_SIZE; i++) { + struct drm_color_lut hwlut = { + .red = drm_color_lut_extract(lut[i].red, DISP_AAL_LUT_BITS), + .green = drm_color_lut_extract(lut[i].green, DISP_AAL_LUT_BITS), + .blue = drm_color_lut_extract(lut[i].blue, DISP_AAL_LUT_BITS) + }; + u32 word; + + word = FIELD_PREP(DISP_AAL_GAMMA_LUT_R, hwlut.red); + word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_G, hwlut.green); + word |= FIELD_PREP(DISP_AAL_GAMMA_LUT_B, hwlut.blue); + writel(word, aal->regs + DISP_AAL_GAMMA_LUT + i * 4); + } + + cfg_val = readl(aal->regs + DISP_AAL_CFG); + + /* Enable the gamma table */ + cfg_val |= FIELD_PREP(AAL_GAMMA_LUT_EN, 1); + + /* Disable RELAY mode to pass the processed image */ + cfg_val &= ~AAL_RELAY_MODE; + + writel(cfg_val, aal->regs + DISP_AAL_CFG); +} + +void mtk_aal_start(struct device *dev) +{ + struct mtk_disp_aal *aal = dev_get_drvdata(dev); + + writel(AAL_EN, aal->regs + DISP_AAL_EN); +} + +void mtk_aal_stop(struct device *dev) +{ + struct mtk_disp_aal *aal = dev_get_drvdata(dev); + + writel_relaxed(0x0, aal->regs + DISP_AAL_EN); +} + +static int mtk_disp_aal_bind(struct device *dev, struct device *master, + void *data) +{ + return 0; +} + +static void mtk_disp_aal_unbind(struct device *dev, struct device *master, + void *data) +{ +} + +static const struct component_ops mtk_disp_aal_component_ops = { + .bind = mtk_disp_aal_bind, + .unbind = mtk_disp_aal_unbind, +}; + +static int mtk_disp_aal_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct mtk_disp_aal *priv; + 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)) + return dev_err_probe(dev, PTR_ERR(priv->clk), + "failed to get aal clk\n"); + + priv->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->regs)) + return dev_err_probe(dev, PTR_ERR(priv->regs), + "failed to ioremap aal\n"); + +#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_aal_component_ops); + if (ret) + return dev_err_probe(dev, ret, "Failed to add component\n"); + + return 0; +} + +static void mtk_disp_aal_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &mtk_disp_aal_component_ops); +} + +static const struct mtk_disp_aal_data mt8173_aal_driver_data = { + .has_gamma = true, +}; + +static const struct of_device_id mtk_disp_aal_driver_dt_match[] = { + { .compatible = "mediatek,mt8173-disp-aal", .data = &mt8173_aal_driver_data }, + { .compatible = "mediatek,mt8183-disp-aal" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, mtk_disp_aal_driver_dt_match); + +struct platform_driver mtk_disp_aal_driver = { + .probe = mtk_disp_aal_probe, + .remove = mtk_disp_aal_remove, + .driver = { + .name = "mediatek-disp-aal", + .of_match_table = mtk_disp_aal_driver_dt_match, + }, +}; |