Hi, Guennadi
>-----Original Message----- >From: Guennadi Liakhovetski [mailto:g.liakhovet...@gmx.de] >Sent: Tuesday, 27 November, 2012 23:54 >To: Albert Wang >Cc: cor...@lwn.net; linux-media@vger.kernel.org; Libin Yang >Subject: Re: [PATCH 12/15] [media] marvell-ccic: add soc_camera support in mmp >driver > >On Fri, 23 Nov 2012, Albert Wang wrote: > >> This patch adds the soc_camera support in the platform driver: mmp-driver.c. >> Specified board driver also should be modified to support soc_camera >> by passing some platform datas to platform driver. >> >> Currently the soc_camera mode in mmp driver only supports B_DMA_contig mode. >> >> Signed-off-by: Libin Yang <lby...@marvell.com> >> Signed-off-by: Albert Wang <twan...@marvell.com> >> --- >> drivers/media/platform/Makefile | 4 +- >> drivers/media/platform/marvell-ccic/Kconfig | 22 ++++++ >> drivers/media/platform/marvell-ccic/mmp-driver.c | 80 >> +++++++++++++++++++--- >> include/media/mmp-camera.h | 2 + >> 4 files changed, 97 insertions(+), 11 deletions(-) >> >> diff --git a/drivers/media/platform/Makefile >> b/drivers/media/platform/Makefile index baaa550..feae003 100644 >> --- a/drivers/media/platform/Makefile >> +++ b/drivers/media/platform/Makefile >> @@ -11,8 +11,8 @@ obj-$(CONFIG_VIDEO_TIMBERDALE) += timblogiw.o >> obj-$(CONFIG_VIDEO_M32R_AR_M64278) += arv.o >> >> obj-$(CONFIG_VIDEO_VIA_CAMERA) += via-camera.o >> -obj-$(CONFIG_VIDEO_CAFE_CCIC) += marvell-ccic/ >> -obj-$(CONFIG_VIDEO_MMP_CAMERA) += marvell-ccic/ >> + >> +obj-$(CONFIG_VIDEO_MARVELL_CCIC) += marvell-ccic/ >> >> obj-$(CONFIG_VIDEO_OMAP2) += omap2cam.o >> obj-$(CONFIG_VIDEO_OMAP3) += omap3isp/ >> diff --git a/drivers/media/platform/marvell-ccic/Kconfig >> b/drivers/media/platform/marvell-ccic/Kconfig >> index bf739e3..6e3eaa0 100755 >> --- a/drivers/media/platform/marvell-ccic/Kconfig >> +++ b/drivers/media/platform/marvell-ccic/Kconfig >> @@ -1,23 +1,45 @@ >> +config VIDEO_MARVELL_CCIC >> + tristate >> +config VIDEO_MRVL_SOC_CAMERA >> + tristate > >The latter you can make a "bool" > OK. >> + >> config VIDEO_CAFE_CCIC >> tristate "Marvell 88ALP01 (Cafe) CMOS Camera Controller support" >> depends on PCI && I2C && VIDEO_V4L2 >> select VIDEO_OV7670 >> select VIDEOBUF2_VMALLOC >> select VIDEOBUF2_DMA_CONTIG >> + select VIDEO_MARVELL_CCIC >> ---help--- >> This is a video4linux2 driver for the Marvell 88ALP01 integrated >> CMOS camera controller. This is the controller found on first- >> generation OLPC systems. >> >> +choice >> + prompt "Camera support on Marvell MMP" >> + depends on ARCH_MMP && VIDEO_V4L2 >> + optional >> config VIDEO_MMP_CAMERA >> tristate "Marvell Armada 610 integrated camera controller support" >> depends on ARCH_MMP && I2C && VIDEO_V4L2 >> select VIDEO_OV7670 >> select I2C_GPIO >> select VIDEOBUF2_DMA_SG >> + select VIDEO_MARVELL_CCIC >> ---help--- >> This is a Video4Linux2 driver for the integrated camera >> controller found on Marvell Armada 610 application >> processors (and likely beyond). This is the controller found >> in OLPC XO 1.75 systems. >> >> +config VIDEO_MMP_SOC_CAMERA >> + bool "Marvell MMP camera driver based on SOC_CAMERA" >> + depends on VIDEO_DEV && SOC_CAMERA && ARCH_MMP && VIDEO_V4L2 >> + select VIDEOBUF2_DMA_CONTIG >> + select VIDEO_MARVELL_CCIC >> + select VIDEO_MRVL_SOC_CAMERA >> + ---help--- >> + This is a Video4Linux2 driver for the Marvell Mobile Soc >> + PXA910/PXA688/PXA2128/PXA988 CCIC >> + (CMOS Camera Interface Controller) endchoice >> diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c >> b/drivers/media/platform/marvell-ccic/mmp-driver.c >> index c3031e7..bea7224 100755 >> --- a/drivers/media/platform/marvell-ccic/mmp-driver.c >> +++ b/drivers/media/platform/marvell-ccic/mmp-driver.c >> @@ -4,6 +4,12 @@ >> * >> * Copyright 2011 Jonathan Corbet <cor...@lwn.net> >> * >> + * History: >> + * Support Soc Camera >> + * Support MIPI interface and Dual CCICs in Soc Camera mode >> + * Sep-2012: Libin Yang <lby...@marvell.com> >> + * Albert Wang <twan...@marvell.com> >> + * >> * This file may be distributed under the terms of the GNU General >> * Public License, version 2. >> */ >> @@ -28,6 +34,10 @@ >> #include <linux/list.h> >> #include <linux/pm.h> >> #include <linux/clk.h> >> +#include <linux/regulator/consumer.h> #include >> +<media/videobuf2-dma-contig.h> #include <media/soc_camera.h> #include >> +<media/soc_mediabus.h> >> >> #include "mcam-core.h" >> >> @@ -40,6 +50,8 @@ struct mmp_camera { >> struct platform_device *pdev; >> struct mcam_camera mcam; >> struct list_head devlist; >> + /* will change here */ >> + struct clk *clk[3]; /* CCIC_GATE, CCIC_RST, CCIC_DBG clocks */ >> int irq; >> }; >> >> @@ -135,7 +147,9 @@ static void mmpcam_power_up_ctlr(struct mmp_camera >> *cam) static void mmpcam_power_up(struct mcam_camera *mcam) { >> struct mmp_camera *cam = mcam_to_cam(mcam); >> +#ifndef CONFIG_VIDEO_MMP_SOC_CAMERA >> struct mmp_camera_platform_data *pdata; >> +#endif >> /* >> * Turn on power and clocks to the controller. >> */ >> @@ -144,34 +158,40 @@ static void mmpcam_power_up(struct mcam_camera >*mcam) >> * Provide power to the sensor. >> */ >> mcam_reg_write(mcam, REG_CLKCTRL, 0x60000002); >> +#ifndef CONFIG_VIDEO_MMP_SOC_CAMERA >> pdata = cam->pdev->dev.platform_data; >> gpio_set_value(pdata->sensor_power_gpio, 1); >> mdelay(5); >> +#endif >> mcam_reg_clear_bit(mcam, REG_CTRL1, 0x10000000); >> +#ifndef CONFIG_VIDEO_MMP_SOC_CAMERA >> gpio_set_value(pdata->sensor_reset_gpio, 0); /* reset is active low */ >> mdelay(5); >> gpio_set_value(pdata->sensor_reset_gpio, 1); /* reset is active low */ >> mdelay(5); >> - >> +#endif >> mcam_clk_set(mcam, 1); >> } >> >> static void mmpcam_power_down(struct mcam_camera *mcam) { >> struct mmp_camera *cam = mcam_to_cam(mcam); >> +#ifndef CONFIG_VIDEO_MMP_SOC_CAMERA >> struct mmp_camera_platform_data *pdata; >> +#endif >> /* >> * Turn off clocks and set reset lines >> */ >> iowrite32(0, cam->power_regs + REG_CCIC_DCGCR); >> iowrite32(0, cam->power_regs + REG_CCIC_CRCR); >> +#ifndef CONFIG_VIDEO_MMP_SOC_CAMERA >> /* >> * Shut down the sensor. >> */ >> pdata = cam->pdev->dev.platform_data; >> gpio_set_value(pdata->sensor_power_gpio, 0); >> gpio_set_value(pdata->sensor_reset_gpio, 0); >> - >> +#endif >> mcam_clk_set(mcam, 0); >> } >> >> @@ -322,20 +342,31 @@ static int mmpcam_probe(struct platform_device *pdev) >> INIT_LIST_HEAD(&cam->devlist); >> >> mcam = &cam->mcam; >> + spin_lock_init(&mcam->dev_lock); >> mcam->plat_power_up = mmpcam_power_up; >> mcam->plat_power_down = mmpcam_power_down; >> mcam->ctlr_reset = mcam_ctlr_reset; >> mcam->calc_dphy = mmpcam_calc_dphy; >> mcam->dev = &pdev->dev; >> mcam->use_smbus = 0; >> + mcam->card_name = pdata->name; >> + mcam->mclk_min = pdata->mclk_min; >> + mcam->mclk_src = pdata->mclk_src; >> + mcam->mclk_div = pdata->mclk_div; > >Actually you don't really have to copy everything from platform data to your >private >driver object during probing. You can access your platform data also at >run-time. So, >maybe you can survive without adding these >.mclk_* struct members? > Yes, make sense. :) >> +#ifdef CONFIG_VIDEO_MMP_SOC_CAMERA > >Maybe you could add a run-time context detection to avoid preprocessor >conditionals? > I confess to use #ifdef is easier then run-time detection. :) But I will think about your suggestion later. >> + mcam->chip_id = pdata->chip_id; >> + mcam->buffer_mode = B_DMA_contig; >> +#else >> + mcam->chip_id = V4L2_IDENT_ARMADA610; >> + mcam->buffer_mode = B_DMA_sg; >> +#endif >> mcam->ccic_id = pdev->id; >> mcam->bus_type = pdata->bus_type; >> mcam->dphy = &(pdata->dphy); >> mcam->mipi_enabled = 0; >> mcam->lane = pdata->lane; >> - mcam->chip_id = V4L2_IDENT_ARMADA610; >> - mcam->buffer_mode = B_DMA_sg; >> - spin_lock_init(&mcam->dev_lock); >> + INIT_LIST_HEAD(&mcam->buffers); >> + >> /* >> * Get our I/O memory. >> */ >> @@ -365,9 +396,22 @@ static int mmpcam_probe(struct platform_device *pdev) >> } >> >> mcam_init_clk(mcam, pdata, 1); >> +#ifdef CONFIG_VIDEO_MMP_SOC_CAMERA >> + mcam->vb_alloc_ctx = >> + vb2_dma_contig_init_ctx(&pdev->dev); >> + if (IS_ERR(mcam->vb_alloc_ctx)) >> + return PTR_ERR(mcam->vb_alloc_ctx); > >Also the choice of the videobuf2 implementation can be a runtime parameter. > OK, we will think about your suggestion. :) >> + >> + ret = mcam_soc_camera_host_register(mcam); >> + if (ret) >> + goto out_free_ctx; >> +#endif >> + >> +#ifdef CONFIG_VIDEO_MMP_CAMERA >> /* >> * Find the i2c adapter. This assumes, of course, that the >> * i2c bus is already up and functioning. >> + * soc-camera manages i2c interface in sensor side >> */ >> mcam->i2c_adapter = platform_get_drvdata(pdata->i2c_device); >> if (mcam->i2c_adapter == NULL) { >> @@ -396,9 +440,10 @@ static int mmpcam_probe(struct platform_device *pdev) >> * Power the device up and hand it off to the core. >> */ >> mmpcam_power_up(mcam); >> +#endif >> ret = mccic_register(mcam); >> if (ret) >> - goto out_gpio2; >> + goto ccic_register_fail; >> /* >> * Finally, set up our IRQ now that the core is ready to >> * deal with it. > >Have you considered splitting the .probe() function into 3: common, MMP and >SOC? >Like > >static int probe() >{ > /* Common probing */ > ... > if (mmp) > ret = mmp_probe(); > else if (soc) > ret = soc_probe(); > if (ret < 0) > goto out_plat_probe; > To be honest, we didn't consider it before. You proposal looks good, it's worth to do it. :) Thank you very much! >> @@ -418,12 +463,21 @@ static int mmpcam_probe(struct platform_device >> *pdev) >> >> out_unregister: >> mccic_shutdown(mcam); >> -out_gpio2: >> +ccic_register_fail: >> +#ifdef CONFIG_VIDEO_MMP_CAMERA >> mmpcam_power_down(mcam); >> + mcam_init_clk(mcam, pdata, 0); >> gpio_free(pdata->sensor_reset_gpio); >> out_gpio: >> gpio_free(pdata->sensor_power_gpio); >> +#endif >> +#ifdef CONFIG_VIDEO_MMP_SOC_CAMERA >> + soc_camera_host_unregister(&mcam->soc_host); >> mcam_init_clk(mcam, pdata, 0); >> +out_free_ctx: >> + vb2_dma_contig_cleanup_ctx(mcam->vb_alloc_ctx); >> + mcam->vb_alloc_ctx = NULL; >> +#endif >> return ret; >> } >> >> @@ -431,14 +485,22 @@ out_gpio: >> static int mmpcam_remove(struct mmp_camera *cam) { >> struct mcam_camera *mcam = &cam->mcam; >> - struct mmp_camera_platform_data *pdata; >> +#ifdef CONFIG_VIDEO_MMP_SOC_CAMERA >> + struct soc_camera_host *soc_host = &mcam->soc_host; #endif >> + struct mmp_camera_platform_data *pdata = >> +cam->pdev->dev.platform_data; >> >> mmpcam_remove_device(cam); >> mccic_shutdown(mcam); >> mmpcam_power_down(mcam); >> - pdata = cam->pdev->dev.platform_data; >> +#ifdef CONFIG_VIDEO_MMP_SOC_CAMERA >> + soc_camera_host_unregister(soc_host); >> + vb2_dma_contig_cleanup_ctx(mcam->vb_alloc_ctx); >> + mcam->vb_alloc_ctx = NULL; >> +#else >> gpio_free(pdata->sensor_reset_gpio); >> gpio_free(pdata->sensor_power_gpio); >> +#endif > >Same here, a runtime detection would look much nicer! > >> mcam_init_clk(mcam, pdata, 0); >> return 0; >> } >> diff --git a/include/media/mmp-camera.h b/include/media/mmp-camera.h >> index 36891ed..731f81f 100755 >> --- a/include/media/mmp-camera.h >> +++ b/include/media/mmp-camera.h >> @@ -6,9 +6,11 @@ struct mmp_camera_platform_data { >> struct platform_device *i2c_device; >> int sensor_power_gpio; >> int sensor_reset_gpio; >> + char name[16]; >> int mclk_min; >> int mclk_src; >> int mclk_div; >> + int chip_id; >> /* >> * MIPI support >> */ >> -- >> 1.7.9.5 >> > >Thanks >Guennadi >--- >Guennadi Liakhovetski, Ph.D. >Freelance Open-Source Software Developer >http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
