Hi, Guennadi
>-----Original Message----- >From: Guennadi Liakhovetski [mailto:g.liakhovet...@gmx.de] >Sent: Tuesday, 27 November, 2012 23:56 >To: Albert Wang >Cc: cor...@lwn.net; linux-media@vger.kernel.org; Libin Yang >Subject: Re: [PATCH 13/15] [media] marvell-ccic: add dma burst mode support in >marvell-ccic driver > >On Fri, 23 Nov 2012, Albert Wang wrote: > >> This patch adds the dma burst size config support for marvell-ccic. >> Developer can set the dma burst size in specified board driver. >> >> Signed-off-by: Libin Yang <lby...@marvell.com> >> Signed-off-by: Albert Wang <twan...@marvell.com> >> --- >> .../media/platform/marvell-ccic/mcam-core-soc.c | 2 +- >> drivers/media/platform/marvell-ccic/mcam-core.h | 7 ++++--- >> drivers/media/platform/marvell-ccic/mmp-driver.c | 11 +++++++++++ >> include/media/mmp-camera.h | 1 + >> 4 files changed, 17 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/media/platform/marvell-ccic/mcam-core-soc.c >> b/drivers/media/platform/marvell-ccic/mcam-core-soc.c >> index a0df8b4..518e6dc 100644 >> --- a/drivers/media/platform/marvell-ccic/mcam-core-soc.c >> +++ b/drivers/media/platform/marvell-ccic/mcam-core-soc.c >> @@ -100,7 +100,7 @@ static int mcam_camera_add_device(struct >soc_camera_device *icd) >> mcam_ctlr_stop(mcam); >> mcam_set_config_needed(mcam, 1); >> mcam_reg_write(mcam, REG_CTRL1, >> - C1_RESERVED | C1_DMAPOSTED); >> + mcam->burst | C1_RESERVED | C1_DMAPOSTED); >> mcam_reg_write(mcam, REG_CLKCTRL, >> (mcam->mclk_src << 29) | mcam->mclk_div); >> cam_dbg(mcam, "camera: set sensor mclk = %dMHz\n", mcam->mclk_min); >> diff --git a/drivers/media/platform/marvell-ccic/mcam-core.h >> b/drivers/media/platform/marvell-ccic/mcam-core.h >> index e149aa3..999b581 100755 >> --- a/drivers/media/platform/marvell-ccic/mcam-core.h >> +++ b/drivers/media/platform/marvell-ccic/mcam-core.h >> @@ -132,6 +132,7 @@ struct mcam_camera { >> short int use_smbus; /* SMBUS or straight I2c? */ >> enum mcam_buffer_mode buffer_mode; >> >> + int burst; >> int mclk_min; >> int mclk_src; >> int mclk_div; >> @@ -419,9 +420,9 @@ int mcam_soc_camera_host_register(struct mcam_camera >*mcam); >> #define C1_DESC_3WORD 0x00000200 /* Three-word descriptors used >> */ >> #define C1_444ALPHA 0x00f00000 /* Alpha field in RGB444 */ >> #define C1_ALPHA_SHFT 20 >> -#define C1_DMAB32 0x00000000 /* 32-byte DMA burst */ >> -#define C1_DMAB16 0x02000000 /* 16-byte DMA burst */ >> -#define C1_DMAB64 0x04000000 /* 64-byte DMA burst */ >> +#define C1_DMAB64 0x00000000 /* 64-byte DMA burst */ >> +#define C1_DMAB128 0x02000000 /* 128-byte DMA burst */ >> +#define C1_DMAB256 0x04000000 /* 256-byte DMA burst */ > >Was this a bug in the driver or is it a different IP version? > I think it's a bug in old code. We didn't find the definition in our specs. >Thanks >Guennadi > >> #define C1_DMAB_MASK 0x06000000 >> #define C1_TWOBUFS 0x08000000 /* Use only two DMA buffers */ >> #define C1_PWRDWN 0x10000000 /* Power down */ >> diff --git a/drivers/media/platform/marvell-ccic/mmp-driver.c >> b/drivers/media/platform/marvell-ccic/mmp-driver.c >> index bea7224..e840941 100755 >> --- a/drivers/media/platform/marvell-ccic/mmp-driver.c >> +++ b/drivers/media/platform/marvell-ccic/mmp-driver.c >> @@ -365,6 +365,17 @@ static int mmpcam_probe(struct platform_device *pdev) >> mcam->dphy = &(pdata->dphy); >> mcam->mipi_enabled = 0; >> mcam->lane = pdata->lane; >> + switch (pdata->dma_burst) { >> + case 128: >> + mcam->burst = C1_DMAB128; >> + break; >> + case 256: >> + mcam->burst = C1_DMAB256; >> + break; >> + default: >> + mcam->burst = C1_DMAB64; >> + break; >> + } >> INIT_LIST_HEAD(&mcam->buffers); >> >> /* >> diff --git a/include/media/mmp-camera.h b/include/media/mmp-camera.h >> index 731f81f..7a5e63c 100755 >> --- a/include/media/mmp-camera.h >> +++ b/include/media/mmp-camera.h >> @@ -11,6 +11,7 @@ struct mmp_camera_platform_data { >> int mclk_src; >> int mclk_div; >> int chip_id; >> + int dma_burst; >> /* >> * MIPI support >> */ >> -- >> 1.7.9.5 >> > >--- >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
