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X-CSE-ConnectionGUID: CUyqTEe5S9uUei4m1ESXAA== X-CSE-MsgGUID: /XahR3IIT9ShW4UrQImmjQ== X-IronPort-AV: E=McAfee;i="6600,9927,11033"; a="8063229" X-IronPort-AV: E=Sophos;i="6.07,178,1708416000"; d="scan'208";a="8063229" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Apr 2024 01:04:05 -0700 X-CSE-ConnectionGUID: HhBK4V/wTBG1ubej6USvBg== X-CSE-MsgGUID: ZtpcSPjFQjq6uyK9CGSKXQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,178,1708416000"; d="scan'208";a="56154819" Received: from turnipsi.fi.intel.com (HELO kekkonen.fi.intel.com) ([10.237.72.44]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Apr 2024 01:04:02 -0700 Received: from kekkonen.localdomain (localhost [127.0.0.1]) by kekkonen.fi.intel.com (Postfix) with SMTP id 9091111F82F; Thu, 4 Apr 2024 11:03:58 +0300 (EEST) Date: Thu, 4 Apr 2024 08:03:58 +0000 From: Sakari Ailus To: Luigi311 Cc: git@luigi311.com, linux-media@vger.kernel.org, dave.stevenson@raspberrypi.com, jacopo.mondi@ideasonboard.com, mchehab@kernel.org, robh@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 08/23] media: i2c: imx258: Add support for 24MHz clock Message-ID: References: <20240327231710.53188-1-git@luigi311.com> <20240327231710.53188-9-git@luigi311.com> <11f2e7d8-fd4c-4e14-81d8-cbc2cd2442fa@luigi311.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <11f2e7d8-fd4c-4e14-81d8-cbc2cd2442fa@luigi311.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240404_010406_831930_F47C4A57 X-CRM114-Status: GOOD ( 40.26 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Luigi311, On Thu, Mar 28, 2024 at 11:55:24AM -0600, Luigi311 wrote: > On 3/28/24 02:09, Sakari Ailus wrote: > > Hi Luigi311, > > > > Thank you for the patchset. > > > > On Wed, Mar 27, 2024 at 05:16:54PM -0600, git@luigi311.com wrote: > >> From: Dave Stevenson > >> > >> There's no reason why only a clock of 19.2MHz is supported. > >> Indeed this isn't even a frequency listed in the datasheet. > >> > >> Add support for 24MHz as well. > >> The PLL settings result in slightly different link frequencies, > >> so parameterise those. > >> > >> Signed-off-by: Dave Stevenson > >> Signed-off-by: Luigi311 > > > > Is Luigi311 your real name? As per > > Documentation/process/submitting-patches.rst, anonymous (or pseudonym I'd > > say as well) contributions are not an option. > > Luigi311 is not my real name but it would be a lot easier to find me if > it was. My real name is Luis Garcia which is a super common name so its > actually way easier to find me and all my work using my online name of > Luigi311. I can go ahead and swap over to Luis Garcia if required but a > name like that would provide no value in contacting/finding me since I'm > not famous like all the other Luis Garcia's that appear on google. Thanks. E-mail addresses are still unique, presumably, so that helps. > > > > >> --- > >> drivers/media/i2c/imx258.c | 133 +++++++++++++++++++++++++++++-------- > >> 1 file changed, 107 insertions(+), 26 deletions(-) > >> > >> diff --git a/drivers/media/i2c/imx258.c b/drivers/media/i2c/imx258.c > >> index 351add1bc5d5..6ee7de079454 100644 > >> --- a/drivers/media/i2c/imx258.c > >> +++ b/drivers/media/i2c/imx258.c > >> @@ -76,9 +76,6 @@ > >> #define REG_CONFIG_MIRROR_FLIP 0x03 > >> #define REG_CONFIG_FLIP_TEST_PATTERN 0x02 > >> > >> -/* Input clock frequency in Hz */ > >> -#define IMX258_INPUT_CLOCK_FREQ 19200000 > >> - > >> struct imx258_reg { > >> u16 address; > >> u8 val; > >> @@ -115,7 +112,9 @@ struct imx258_mode { > >> }; > >> > >> /* 4208x3120 needs 1267Mbps/lane, 4 lanes */ > >> -static const struct imx258_reg mipi_data_rate_1267mbps[] = { > >> +static const struct imx258_reg mipi_1267mbps_19_2mhz[] = { > >> + { 0x0136, 0x13 }, > >> + { 0x0137, 0x33 }, > >> { 0x0301, 0x05 }, > >> { 0x0303, 0x02 }, > >> { 0x0305, 0x03 }, > >> @@ -133,7 +132,29 @@ static const struct imx258_reg mipi_data_rate_1267mbps[] = { > >> { 0x0823, 0xCC }, > >> }; > >> > >> -static const struct imx258_reg mipi_data_rate_640mbps[] = { > >> +static const struct imx258_reg mipi_1272mbps_24mhz[] = { > >> + { 0x0136, 0x18 }, > >> + { 0x0137, 0x00 }, > >> + { 0x0301, 0x05 }, > >> + { 0x0303, 0x02 }, > >> + { 0x0305, 0x04 }, > >> + { 0x0306, 0x00 }, > >> + { 0x0307, 0xD4 }, > >> + { 0x0309, 0x0A }, > >> + { 0x030B, 0x01 }, > >> + { 0x030D, 0x02 }, > >> + { 0x030E, 0x00 }, > >> + { 0x030F, 0xD8 }, > >> + { 0x0310, 0x00 }, > >> + { 0x0820, 0x13 }, > >> + { 0x0821, 0x4C }, > >> + { 0x0822, 0xCC }, > >> + { 0x0823, 0xCC }, > >> +}; > >> + > >> +static const struct imx258_reg mipi_640mbps_19_2mhz[] = { > >> + { 0x0136, 0x13 }, > >> + { 0x0137, 0x33 }, > >> { 0x0301, 0x05 }, > >> { 0x0303, 0x02 }, > >> { 0x0305, 0x03 }, > >> @@ -151,9 +172,27 @@ static const struct imx258_reg mipi_data_rate_640mbps[] = { > >> { 0x0823, 0x00 }, > >> }; > >> > >> +static const struct imx258_reg mipi_642mbps_24mhz[] = { > >> + { 0x0136, 0x18 }, > >> + { 0x0137, 0x00 }, > >> + { 0x0301, 0x05 }, > >> + { 0x0303, 0x02 }, > >> + { 0x0305, 0x04 }, > >> + { 0x0306, 0x00 }, > >> + { 0x0307, 0x6B }, > >> + { 0x0309, 0x0A }, > >> + { 0x030B, 0x01 }, > >> + { 0x030D, 0x02 }, > >> + { 0x030E, 0x00 }, > >> + { 0x030F, 0xD8 }, > >> + { 0x0310, 0x00 }, > >> + { 0x0820, 0x0A }, > >> + { 0x0821, 0x00 }, > >> + { 0x0822, 0x00 }, > >> + { 0x0823, 0x00 }, > >> +}; > >> + > >> static const struct imx258_reg mode_common_regs[] = { > >> - { 0x0136, 0x13 }, > >> - { 0x0137, 0x33 }, > >> { 0x3051, 0x00 }, > >> { 0x3052, 0x00 }, > >> { 0x4E21, 0x14 }, > >> @@ -313,10 +352,6 @@ static const char * const imx258_supply_name[] = { > >> > >> #define IMX258_NUM_SUPPLIES ARRAY_SIZE(imx258_supply_name) > >> > >> -/* Configurations for supported link frequencies */ > >> -#define IMX258_LINK_FREQ_634MHZ 633600000ULL > >> -#define IMX258_LINK_FREQ_320MHZ 320000000ULL > >> - > >> enum { > >> IMX258_LINK_FREQ_1267MBPS, > >> IMX258_LINK_FREQ_640MBPS, > >> @@ -335,25 +370,55 @@ static u64 link_freq_to_pixel_rate(u64 f) > >> } > >> > >> /* Menu items for LINK_FREQ V4L2 control */ > >> -static const s64 link_freq_menu_items[] = { > >> +/* Configurations for supported link frequencies */ > >> +#define IMX258_LINK_FREQ_634MHZ 633600000ULL > >> +#define IMX258_LINK_FREQ_320MHZ 320000000ULL > >> + > >> +static const s64 link_freq_menu_items_19_2[] = { > >> IMX258_LINK_FREQ_634MHZ, > >> IMX258_LINK_FREQ_320MHZ, > >> }; > >> > >> +/* Configurations for supported link frequencies */ > >> +#define IMX258_LINK_FREQ_636MHZ 636000000ULL > >> +#define IMX258_LINK_FREQ_321MHZ 321000000ULL > > > > These values aren't used outside the array below and the macro names are > > imprecise anyway. Could you put the numerical values to the array instead? > > Ok I've removed the defines and just threw the values into the array instead. > > > > >> + > >> +static const s64 link_freq_menu_items_24[] = { > >> + IMX258_LINK_FREQ_636MHZ, > >> + IMX258_LINK_FREQ_321MHZ, > >> +}; > >> + > >> /* Link frequency configs */ > >> -static const struct imx258_link_freq_config link_freq_configs[] = { > >> +static const struct imx258_link_freq_config link_freq_configs_19_2[] = { > >> [IMX258_LINK_FREQ_1267MBPS] = { > >> .pixels_per_line = IMX258_PPL_DEFAULT, > >> .reg_list = { > >> - .num_of_regs = ARRAY_SIZE(mipi_data_rate_1267mbps), > >> - .regs = mipi_data_rate_1267mbps, > >> + .num_of_regs = ARRAY_SIZE(mipi_1267mbps_19_2mhz), > >> + .regs = mipi_1267mbps_19_2mhz, > >> } > >> }, > >> [IMX258_LINK_FREQ_640MBPS] = { > >> .pixels_per_line = IMX258_PPL_DEFAULT, > >> .reg_list = { > >> - .num_of_regs = ARRAY_SIZE(mipi_data_rate_640mbps), > >> - .regs = mipi_data_rate_640mbps, > >> + .num_of_regs = ARRAY_SIZE(mipi_640mbps_19_2mhz), > >> + .regs = mipi_640mbps_19_2mhz, > >> + } > >> + }, > >> +}; > >> + > >> +static const struct imx258_link_freq_config link_freq_configs_24[] = { > >> + [IMX258_LINK_FREQ_1267MBPS] = { > >> + .pixels_per_line = IMX258_PPL_DEFAULT, > >> + .reg_list = { > >> + .num_of_regs = ARRAY_SIZE(mipi_1272mbps_24mhz), > >> + .regs = mipi_1272mbps_24mhz, > >> + } > >> + }, > >> + [IMX258_LINK_FREQ_640MBPS] = { > >> + .pixels_per_line = IMX258_PPL_DEFAULT, > >> + .reg_list = { > >> + .num_of_regs = ARRAY_SIZE(mipi_642mbps_24mhz), > >> + .regs = mipi_642mbps_24mhz, > >> } > >> }, > >> }; > >> @@ -410,6 +475,9 @@ struct imx258 { > >> /* Current mode */ > >> const struct imx258_mode *cur_mode; > >> > >> + const struct imx258_link_freq_config *link_freq_configs; > >> + const s64 *link_freq_menu_items; > >> + > >> /* > >> * Mutex for serialized access: > >> * Protect sensor module set pad format and start/stop streaming safely. > >> @@ -713,7 +781,7 @@ static int imx258_set_pad_format(struct v4l2_subdev *sd, > >> imx258->cur_mode = mode; > >> __v4l2_ctrl_s_ctrl(imx258->link_freq, mode->link_freq_index); > >> > >> - link_freq = link_freq_menu_items[mode->link_freq_index]; > >> + link_freq = imx258->link_freq_menu_items[mode->link_freq_index]; > >> pixel_rate = link_freq_to_pixel_rate(link_freq); > >> __v4l2_ctrl_s_ctrl_int64(imx258->pixel_rate, pixel_rate); > >> /* Update limits and set FPS to default */ > >> @@ -727,7 +795,7 @@ static int imx258_set_pad_format(struct v4l2_subdev *sd, > >> vblank_def); > >> __v4l2_ctrl_s_ctrl(imx258->vblank, vblank_def); > >> h_blank = > >> - link_freq_configs[mode->link_freq_index].pixels_per_line > >> + imx258->link_freq_configs[mode->link_freq_index].pixels_per_line > >> - imx258->cur_mode->width; > >> __v4l2_ctrl_modify_range(imx258->hblank, h_blank, > >> h_blank, 1, h_blank); > >> @@ -747,7 +815,7 @@ static int imx258_start_streaming(struct imx258 *imx258) > >> > >> /* Setup PLL */ > >> link_freq_index = imx258->cur_mode->link_freq_index; > >> - reg_list = &link_freq_configs[link_freq_index].reg_list; > >> + reg_list = &imx258->link_freq_configs[link_freq_index].reg_list; > >> ret = imx258_write_regs(imx258, reg_list->regs, reg_list->num_of_regs); > >> if (ret) { > >> dev_err(&client->dev, "%s failed to set plls\n", __func__); > >> @@ -946,9 +1014,9 @@ static int imx258_init_controls(struct imx258 *imx258) > >> imx258->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, > >> &imx258_ctrl_ops, > >> V4L2_CID_LINK_FREQ, > >> - ARRAY_SIZE(link_freq_menu_items) - 1, > >> + ARRAY_SIZE(link_freq_menu_items_19_2) - 1, > >> 0, > >> - link_freq_menu_items); > >> + imx258->link_freq_menu_items); > >> > >> if (imx258->link_freq) > >> imx258->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY; > >> @@ -964,8 +1032,10 @@ static int imx258_init_controls(struct imx258 *imx258) > >> if (vflip) > >> vflip->flags |= V4L2_CTRL_FLAG_READ_ONLY; > >> > >> - pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]); > >> - pixel_rate_min = link_freq_to_pixel_rate(link_freq_menu_items[1]); > >> + pixel_rate_max = > >> + link_freq_to_pixel_rate(imx258->link_freq_menu_items[0]); > >> + pixel_rate_min = > >> + link_freq_to_pixel_rate(imx258->link_freq_menu_items[1]); > > > > The arrays currently have two entries so this works but it'd nice to have a > > bit more robust way to handle differences between the two arrays. Could you > > maintain e.g. the number of entries in the array in a struct field perhaps? > > Would it make more sense to do something like default to index 0 and then use > ARRAY_SIZE to iterate through the array and do a comparison to get the min and > max size so it would always choose the correct value no matter how many entries > there are? I'll check that later patch you mentioned in the follow-up separately. -- Kind regards, Sakari Ailus _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel