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Lin" , Fei Shao , Sean Paul , Jason Chen , , , , , Hsiao Chien Sung Subject: [PATCH v6 13/14] drm/mediatek: Support CRC in OVL Date: Fri, 22 Mar 2024 13:28:28 +0800 Message-ID: <20240322052829.9893-14-shawn.sung@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240322052829.9893-1-shawn.sung@mediatek.com> References: <20240322052829.9893-1-shawn.sung@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240321_222842_167670_5EE77B8E X-CRM114-Status: GOOD ( 30.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Hsiao Chien Sung We choose OVL as the CRC generator from other hardware components that are also capable of calculating CRCs, since its frame done event triggers vblanks, it can be used as a signal to know when is safe to retrieve CRC of the frame. Please note that position of the hardware component that is chosen as CRC generator in the display path is significant. For example, while OVL is the first module in VDOSYS0, its CRC won't be affected by the modules after it, which means effects applied by PQ, Gamma, Dither or any other components after OVL won't be calculated in CRC generation. Signed-off-by: Hsiao Chien Sung --- drivers/gpu/drm/mediatek/mtk_ddp_comp.c | 3 + drivers/gpu/drm/mediatek/mtk_disp_drv.h | 3 + drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 198 ++++++++++++++++++++++-- 3 files changed, 194 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_ddp_comp.c index 17b0364112922..cb71effda9c2a 100644 --- a/drivers/gpu/drm/mediatek/mtk_ddp_comp.c +++ b/drivers/gpu/drm/mediatek/mtk_ddp_comp.c @@ -351,6 +351,9 @@ static const struct mtk_ddp_comp_funcs ddp_ovl = { .clk_enable = mtk_ovl_clk_enable, .clk_disable = mtk_ovl_clk_disable, .config = mtk_ovl_config, + .crc_cnt = mtk_ovl_crc_cnt, + .crc_entry = mtk_ovl_crc_entry, + .crc_read = mtk_ovl_crc_read, .start = mtk_ovl_start, .stop = mtk_ovl_stop, .register_vblank_cb = mtk_ovl_register_vblank_cb, diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h index 082ac18fe04aa..c476056a5cbb5 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h +++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h @@ -105,6 +105,9 @@ void mtk_ovl_enable_vblank(struct device *dev); void mtk_ovl_disable_vblank(struct device *dev); const u32 *mtk_ovl_get_formats(struct device *dev); size_t mtk_ovl_get_num_formats(struct device *dev); +size_t mtk_ovl_crc_cnt(struct device *dev); +u32 *mtk_ovl_crc_entry(struct device *dev); +void mtk_ovl_crc_read(struct device *dev); void mtk_ovl_adaptor_add_comp(struct device *dev, struct mtk_mutex *mutex); void mtk_ovl_adaptor_remove_comp(struct device *dev, struct mtk_mutex *mutex); diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c index a936f338ab79d..279e6193e7975 100644 --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c @@ -24,12 +24,20 @@ #define OVL_FME_CPL_INT BIT(1) #define DISP_REG_OVL_INTSTA 0x0008 #define DISP_REG_OVL_EN 0x000c +#define OVL_EN BIT(0) +#define OVL_OP_8BIT_MODE BIT(4) +#define OVL_HG_FOVL_CK_ON BIT(8) +#define OVL_HF_FOVL_CK_ON BIT(10) +#define DISP_REG_OVL_TRIG 0x0010 +#define OVL_CRC_EN BIT(8) +#define OVL_CRC_CLR BIT(9) #define DISP_REG_OVL_RST 0x0014 #define DISP_REG_OVL_ROI_SIZE 0x0020 #define DISP_REG_OVL_DATAPATH_CON 0x0024 #define OVL_LAYER_SMI_ID_EN BIT(0) #define OVL_BGCLR_SEL_IN BIT(2) #define OVL_LAYER_AFBC_EN(n) BIT(4+n) +#define OVL_OUTPUT_CLAMP BIT(26) #define DISP_REG_OVL_ROI_BGCLR 0x0028 #define DISP_REG_OVL_SRC_CON 0x002c #define DISP_REG_OVL_CON(n) (0x0030 + 0x20 * (n)) @@ -42,7 +50,26 @@ #define DISP_REG_OVL_RDMA_CTRL(n) (0x00c0 + 0x20 * (n)) #define DISP_REG_OVL_RDMA_GMC(n) (0x00c8 + 0x20 * (n)) #define DISP_REG_OVL_ADDR_MT2701 0x0040 +#define DISP_REG_OVL_CRC 0x0270 +#define OVL_CRC_OUT_MASK GENMASK(30, 0) #define DISP_REG_OVL_CLRFMT_EXT 0x02D0 +#define DISP_REG_OVL_CLRFMT_EXT1 0x02D8 +#define OVL_CLRFMT_EXT1_CSC_EN(n) (1 << (((n) * 4) + 1)) +#define DISP_REG_OVL_Y2R_PARA_R0(n) (0x0134 + 0x28 * (n)) +#define OVL_Y2R_PARA_C_CF_RMY (GENMASK(14, 0)) +#define DISP_REG_OVL_Y2R_PARA_G0(n) (0x013c + 0x28 * (n)) +#define OVL_Y2R_PARA_C_CF_GMU (GENMASK(30, 16)) +#define DISP_REG_OVL_Y2R_PARA_B1(n) (0x0148 + 0x28 * (n)) +#define OVL_Y2R_PARA_C_CF_BMV (GENMASK(14, 0)) +#define DISP_REG_OVL_Y2R_PARA_YUV_A_0(n) (0x014c + 0x28 * (n)) +#define OVL_Y2R_PARA_C_CF_YA (GENMASK(10, 0)) +#define OVL_Y2R_PARA_C_CF_UA (GENMASK(26, 16)) +#define DISP_REG_OVL_Y2R_PARA_YUV_A_1(n) (0x0150 + 0x28 * (n)) +#define OVL_Y2R_PARA_C_CF_VA (GENMASK(10, 0)) +#define DISP_REG_OVL_Y2R_PRE_ADD2(n) (0x0154 + 0x28 * (n)) +#define DISP_REG_OVL_R2R_R0(n) (0x0500 + 0x40 * (n)) +#define DISP_REG_OVL_R2R_G1(n) (0x0510 + 0x40 * (n)) +#define DISP_REG_OVL_R2R_B2(n) (0x0520 + 0x40 * (n)) #define DISP_REG_OVL_ADDR_MT8173 0x0f40 #define DISP_REG_OVL_ADDR(ovl, n) ((ovl)->data->addr + 0x20 * (n)) #define DISP_REG_OVL_HDR_ADDR(ovl, n) ((ovl)->data->addr + 0x20 * (n) + 0x04) @@ -55,6 +82,8 @@ #define OVL_CON_CLRFMT_MAN BIT(23) #define OVL_CON_BYTE_SWAP BIT(24) #define OVL_CON_RGB_SWAP BIT(25) +#define OVL_CON_MTX_AUTO_DIS BIT(26) +#define OVL_CON_MTX_EN BIT(27) #define OVL_CON_CLRFMT_RGB (1 << 12) #define OVL_CON_CLRFMT_RGBA8888 (2 << 12) #define OVL_CON_CLRFMT_ARGB8888 (3 << 12) @@ -62,6 +91,7 @@ #define OVL_CON_CLRFMT_YUYV (5 << 12) #define OVL_CON_MTX_YUV_TO_RGB (6 << 16) #define OVL_CON_CLRFMT_PARGB8888 (OVL_CON_CLRFMT_ARGB8888 | OVL_CON_CLRFMT_MAN) +#define OVL_CON_MTX_PROGRAMMABLE (8 << 16) #define OVL_CON_CLRFMT_RGB565(ovl) ((ovl)->data->fmt_rgb565_is_0 ? \ 0 : OVL_CON_CLRFMT_RGB) #define OVL_CON_CLRFMT_RGB888(ovl) ((ovl)->data->fmt_rgb565_is_0 ? \ @@ -131,6 +161,10 @@ static const u32 mt8195_formats[] = { DRM_FORMAT_YUYV, }; +static const u32 mt8195_ovl_crc_ofs[] = { + DISP_REG_OVL_CRC, +}; + struct mtk_disp_ovl_data { unsigned int addr; unsigned int gmc_bits; @@ -141,12 +175,15 @@ struct mtk_disp_ovl_data { const u32 *formats; size_t num_formats; bool supports_clrfmt_ext; + const u32 *crc_ofs; + size_t crc_cnt; }; /* * struct mtk_disp_ovl - DISP_OVL driver structure * @crtc: associated crtc to report vblank events to * @data: platform data + * @crc: crc related information */ struct mtk_disp_ovl { struct drm_crtc *crtc; @@ -156,8 +193,31 @@ struct mtk_disp_ovl { const struct mtk_disp_ovl_data *data; void (*vblank_cb)(void *data); void *vblank_cb_data; + resource_size_t regs_pa; + struct mtk_crtc_crc crc; }; +size_t mtk_ovl_crc_cnt(struct device *dev) +{ + struct mtk_disp_ovl *ovl = dev_get_drvdata(dev); + + return ovl->crc.cnt; +} + +u32 *mtk_ovl_crc_entry(struct device *dev) +{ + struct mtk_disp_ovl *ovl = dev_get_drvdata(dev); + + return ovl->crc.va; +} + +void mtk_ovl_crc_read(struct device *dev) +{ + struct mtk_disp_ovl *ovl = dev_get_drvdata(dev); + + mtk_crtc_read_crc(&ovl->crc, ovl->regs); +} + static irqreturn_t mtk_disp_ovl_irq_handler(int irq, void *dev_id) { struct mtk_disp_ovl *priv = dev_id; @@ -237,21 +297,40 @@ void mtk_ovl_clk_disable(struct device *dev) void mtk_ovl_start(struct device *dev) { struct mtk_disp_ovl *ovl = dev_get_drvdata(dev); + unsigned int reg = readl(ovl->regs + DISP_REG_OVL_DATAPATH_CON); - if (ovl->data->smi_id_en) { - unsigned int reg; + if (ovl->data->smi_id_en) + reg |= OVL_LAYER_SMI_ID_EN; - reg = readl(ovl->regs + DISP_REG_OVL_DATAPATH_CON); - reg = reg | OVL_LAYER_SMI_ID_EN; - writel_relaxed(reg, ovl->regs + DISP_REG_OVL_DATAPATH_CON); + /* + * When doing Y2R conversion, it's common to get an output + * that is larger than 10 bits (negative numbers). + * Enable this bit to clamp the output to 10 bits per channel + * (should always be enabled) + */ + reg |= OVL_OUTPUT_CLAMP; + writel_relaxed(reg, ovl->regs + DISP_REG_OVL_DATAPATH_CON); + + reg = OVL_EN; + if (ovl->data->crc_cnt) { + /* enable crc and its related clocks */ + writel_relaxed(OVL_CRC_EN, ovl->regs + DISP_REG_OVL_TRIG); + reg |= OVL_OP_8BIT_MODE | OVL_HG_FOVL_CK_ON | OVL_HF_FOVL_CK_ON; } - writel_relaxed(0x1, ovl->regs + DISP_REG_OVL_EN); + writel_relaxed(reg, ovl->regs + DISP_REG_OVL_EN); + +#if IS_REACHABLE(CONFIG_MTK_CMDQ) + mtk_crtc_start_crc_cmdq(&ovl->crc); +#endif } void mtk_ovl_stop(struct device *dev) { struct mtk_disp_ovl *ovl = dev_get_drvdata(dev); +#if IS_REACHABLE(CONFIG_MTK_CMDQ) + mtk_crtc_stop_crc_cmdq(&ovl->crc); +#endif writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_EN); if (ovl->data->smi_id_en) { unsigned int reg; @@ -488,6 +567,83 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx, (state->base.fb && !state->base.fb->format->has_alpha)) ignore_pixel_alpha = OVL_CONST_BLEND; + /* + * OVL only supports 8 bits data in CRC calculation, transform 10-bit + * RGB to 8-bit RGB by leveraging the ability of the Y2R (YUV-to-RGB) + * hardware to multiply coefficients, although there is nothing to do + * with the YUV format. + */ + if (ovl->data->supports_clrfmt_ext) { + u32 y2r_coef = 0, y2r_offset = 0, r2r_coef = 0, csc_en = 0; + + if (is_10bit_rgb(fmt)) { + con |= OVL_CON_MTX_AUTO_DIS | OVL_CON_MTX_EN | OVL_CON_MTX_PROGRAMMABLE; + + /* + * Y2R coefficient setting + * bit 13 is 2^1, bit 12 is 2^0, bit 11 is 2^-1, + * bit 10 is 2^-2 = 0.25 + */ + y2r_coef = BIT(10); + + /* -1 in 10bit */ + y2r_offset = GENMASK(10, 0) - 1; + + /* + * R2R coefficient setting + * bit 19 is 2^1, bit 18 is 2^0, bit 17 is 2^-1, + * bit 20 is 2^2 = 4 + */ + r2r_coef = BIT(20); + + /* CSC_EN is for R2R */ + csc_en = OVL_CLRFMT_EXT1_CSC_EN(idx); + + /* + * 1. YUV input data - 1 and shift right for 2 bits to remove it + * [R'] [0.25 0 0] [Y in - 1] + * [G'] = [ 0 0.25 0] * [U in - 1] + * [B'] [ 0 0 0.25] [V in - 1] + * + * 2. shift left for 2 bit letting the last 2 bits become 0 + * [R out] [ 4 0 0] [R'] + * [G out] = [ 0 4 0] * [G'] + * [B out] [ 0 0 4] [B'] + */ + } + + mtk_ddp_write_mask(cmdq_pkt, y2r_coef, + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_R0(idx), + OVL_Y2R_PARA_C_CF_RMY); + mtk_ddp_write_mask(cmdq_pkt, (y2r_coef << 16), + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_G0(idx), + OVL_Y2R_PARA_C_CF_GMU); + mtk_ddp_write_mask(cmdq_pkt, y2r_coef, + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_B1(idx), + OVL_Y2R_PARA_C_CF_BMV); + + mtk_ddp_write_mask(cmdq_pkt, y2r_offset, + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_YUV_A_0(idx), + OVL_Y2R_PARA_C_CF_YA); + mtk_ddp_write_mask(cmdq_pkt, (y2r_offset << 16), + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_YUV_A_0(idx), + OVL_Y2R_PARA_C_CF_UA); + mtk_ddp_write_mask(cmdq_pkt, y2r_offset, + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_Y2R_PARA_YUV_A_1(idx), + OVL_Y2R_PARA_C_CF_VA); + + mtk_ddp_write_relaxed(cmdq_pkt, r2r_coef, + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_R2R_R0(idx)); + mtk_ddp_write_relaxed(cmdq_pkt, r2r_coef, + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_R2R_G1(idx)); + mtk_ddp_write_relaxed(cmdq_pkt, r2r_coef, + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_R2R_B2(idx)); + + mtk_ddp_write_mask(cmdq_pkt, csc_en, + &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_CLRFMT_EXT1, + OVL_CLRFMT_EXT1_CSC_EN(idx)); + } + if (pending->rotation & DRM_MODE_REFLECT_Y) { con |= OVL_CON_VIRT_FLIP; addr += (pending->height - 1) * pending->pitch; @@ -594,15 +750,31 @@ static int mtk_disp_ovl_probe(struct platform_device *pdev) dev_err(dev, "failed to ioremap ovl\n"); return PTR_ERR(priv->regs); } + + priv->data = of_device_get_match_data(dev); + platform_set_drvdata(pdev, priv); + + if (priv->data->crc_cnt) { + mtk_crtc_init_crc(&priv->crc, + priv->data->crc_ofs, priv->data->crc_cnt, + DISP_REG_OVL_TRIG, OVL_CRC_CLR); + } + #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); + if (priv->data->crc_cnt) { + if (of_property_read_u32_index(dev->of_node, + "mediatek,gce-events", 0, + &priv->crc.cmdq_event)) { + dev_warn(dev, "failed to get gce-events for crc\n"); + } + priv->crc.cmdq_reg = &priv->cmdq_reg; + mtk_crtc_create_crc_cmdq(dev, &priv->crc); + } +#endif ret = devm_request_irq(dev, irq, mtk_disp_ovl_irq_handler, IRQF_TRIGGER_NONE, dev_name(dev), priv); if (ret < 0) { @@ -623,6 +795,10 @@ static int mtk_disp_ovl_probe(struct platform_device *pdev) static void mtk_disp_ovl_remove(struct platform_device *pdev) { + struct device *dev = &pdev->dev; + struct mtk_disp_ovl *ovl = dev_get_drvdata(dev); + + mtk_crtc_destroy_crc(&ovl->crc); component_del(&pdev->dev, &mtk_disp_ovl_component_ops); pm_runtime_disable(&pdev->dev); } @@ -693,6 +869,8 @@ static const struct mtk_disp_ovl_data mt8195_ovl_driver_data = { .formats = mt8195_formats, .num_formats = ARRAY_SIZE(mt8195_formats), .supports_clrfmt_ext = true, + .crc_ofs = mt8195_ovl_crc_ofs, + .crc_cnt = ARRAY_SIZE(mt8195_ovl_crc_ofs), }; static const struct of_device_id mtk_disp_ovl_driver_dt_match[] = {