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[176.10.200.138]) by smtp.gmail.com with ESMTPSA id s10sm7730032ljp.87.2020.03.16.06.02.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Mar 2020 06:02:47 -0700 (PDT) Date: Mon, 16 Mar 2020 14:02:47 +0100 From: Niklas =?iso-8859-1?Q?S=F6derlund?= To: Suresh Udipi Cc: Laurent Pinchart , Hans Verkuil , Jacopo Mondi , Michael Rodin , Eugen Friedrich , akiyama@nds-osk.co.jp, Eugeniu Rosca , linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, securitycheck@denso.co.jp Subject: Re: [PATCH] [RFC] media: rcar-csi2: Corrects the selection of hsfreqrange Message-ID: <20200316130247.GA2258968@oden.dyn.berto.se> References: <1582174149-11547-1-git-send-email-sudipi@jp.adit-jv.com> <20200304194600.GA1791497@oden.dyn.berto.se> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200304194600.GA1791497@oden.dyn.berto.se> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Suresh, Gentle ping on this. Do you plan to send a new version of this patch? On 2020-03-04 20:46:02 +0100, Niklas Söderlund wrote: > Hi Suresh, > > Thanks for your work! > > On 2020-02-20 13:49:09 +0900, Suresh Udipi wrote: > > hsfreqrange should be chosen based on the calculated mbps which > > is closer to the default bit rate and within the range as per > > table[1]. But current calculation always selects fist value which > > greater than the calcuated mbps which may lead to chosing a > > wrong range in some cases. > > > > For example for 360 mbps for H3/M3N > > Existing logic selects > > Calculated value 360Mbps : Default 400Mbps Range [368.125 -433.125 mbps] > > > > This hsfreqrange is buggy and also out of range. > > > > The logic is changed to get the default value which is closest to the > > calculated value [1] > > > > Calculate value 360Mbps : Default 350Mbps Range [320.625 -380.625 mpbs] > > > > [1] specs r19uh0105ej0200-r-car-3rd-generation.pdf [Table 25.9] > > It's great that you are addressing this issue. Out of curiosity what > hardware setup and configuration have you used to trigger the issue (if > any)? > > > > > Signed-off-by: Suresh Udipi > > Signed-off-by: Kazuyoshi Akiyama > > --- > > drivers/media/platform/rcar-vin/rcar-csi2.c | 185 +++++++++++++++------------- > > 1 file changed, 97 insertions(+), 88 deletions(-) > > > > diff --git a/drivers/media/platform/rcar-vin/rcar-csi2.c b/drivers/media/platform/rcar-vin/rcar-csi2.c > > index faa9fb2..1966ece 100644 > > --- a/drivers/media/platform/rcar-vin/rcar-csi2.c > > +++ b/drivers/media/platform/rcar-vin/rcar-csi2.c > > @@ -134,6 +134,8 @@ struct phtw_value { > > struct rcsi2_mbps_reg { > > u16 mbps; > > u16 reg; > > + u16 min; > > + u16 max; > > }; > > > > static const struct rcsi2_mbps_reg phtw_mbps_h3_v3h_m3n[] = { > > @@ -201,96 +203,96 @@ static const struct rcsi2_mbps_reg phtw_mbps_v3m_e3[] = { > > #define PHYPLL_HSFREQRANGE(n) ((n) << 16) > > > > static const struct rcsi2_mbps_reg hsfreqrange_h3_v3h_m3n[] = { > > - { .mbps = 80, .reg = 0x00 }, > > - { .mbps = 90, .reg = 0x10 }, > > - { .mbps = 100, .reg = 0x20 }, > > - { .mbps = 110, .reg = 0x30 }, > > - { .mbps = 120, .reg = 0x01 }, > > - { .mbps = 130, .reg = 0x11 }, > > - { .mbps = 140, .reg = 0x21 }, > > - { .mbps = 150, .reg = 0x31 }, > > - { .mbps = 160, .reg = 0x02 }, > > - { .mbps = 170, .reg = 0x12 }, > > - { .mbps = 180, .reg = 0x22 }, > > - { .mbps = 190, .reg = 0x32 }, > > - { .mbps = 205, .reg = 0x03 }, > > - { .mbps = 220, .reg = 0x13 }, > > - { .mbps = 235, .reg = 0x23 }, > > - { .mbps = 250, .reg = 0x33 }, > > - { .mbps = 275, .reg = 0x04 }, > > - { .mbps = 300, .reg = 0x14 }, > > - { .mbps = 325, .reg = 0x25 }, > > - { .mbps = 350, .reg = 0x35 }, > > - { .mbps = 400, .reg = 0x05 }, > > - { .mbps = 450, .reg = 0x16 }, > > - { .mbps = 500, .reg = 0x26 }, > > - { .mbps = 550, .reg = 0x37 }, > > - { .mbps = 600, .reg = 0x07 }, > > - { .mbps = 650, .reg = 0x18 }, > > - { .mbps = 700, .reg = 0x28 }, > > - { .mbps = 750, .reg = 0x39 }, > > - { .mbps = 800, .reg = 0x09 }, > > - { .mbps = 850, .reg = 0x19 }, > > - { .mbps = 900, .reg = 0x29 }, > > - { .mbps = 950, .reg = 0x3a }, > > - { .mbps = 1000, .reg = 0x0a }, > > - { .mbps = 1050, .reg = 0x1a }, > > - { .mbps = 1100, .reg = 0x2a }, > > - { .mbps = 1150, .reg = 0x3b }, > > - { .mbps = 1200, .reg = 0x0b }, > > - { .mbps = 1250, .reg = 0x1b }, > > - { .mbps = 1300, .reg = 0x2b }, > > - { .mbps = 1350, .reg = 0x3c }, > > - { .mbps = 1400, .reg = 0x0c }, > > - { .mbps = 1450, .reg = 0x1c }, > > - { .mbps = 1500, .reg = 0x2c }, > > + { .mbps = 80, .reg = 0x00, .min = 80, .max = 97 }, > > + { .mbps = 90, .reg = 0x10, .min = 80, .max = 107 }, > > + { .mbps = 100, .reg = 0x20, .min = 83, .max = 118 }, > > + { .mbps = 110, .reg = 0x30, .min = 93, .max = 128 }, > > + { .mbps = 120, .reg = 0x01, .min = 103, .max = 139 }, > > + { .mbps = 130, .reg = 0x11, .min = 112, .max = 149 }, > > + { .mbps = 140, .reg = 0x21, .min = 122, .max = 160 }, > > + { .mbps = 150, .reg = 0x31, .min = 131, .max = 170 }, > > + { .mbps = 160, .reg = 0x02, .min = 141, .max = 181 }, > > + { .mbps = 170, .reg = 0x12, .min = 150, .max = 191 }, > > + { .mbps = 180, .reg = 0x22, .min = 160, .max = 202 }, > > + { .mbps = 190, .reg = 0x32, .min = 169, .max = 212 }, > > + { .mbps = 205, .reg = 0x03, .min = 183, .max = 228 }, > > + { .mbps = 220, .reg = 0x13, .min = 198, .max = 224 }, > > + { .mbps = 235, .reg = 0x23, .min = 212, .max = 259 }, > > + { .mbps = 250, .reg = 0x33, .min = 226, .max = 275 }, > > + { .mbps = 275, .reg = 0x04, .min = 250, .max = 301 }, > > + { .mbps = 300, .reg = 0x14, .min = 274, .max = 328 }, > > + { .mbps = 325, .reg = 0x25, .min = 297, .max = 354 }, > > + { .mbps = 350, .reg = 0x35, .min = 321, .max = 380 }, > > + { .mbps = 400, .reg = 0x05, .min = 369, .max = 433 }, > > + { .mbps = 450, .reg = 0x16, .min = 416, .max = 485 }, > > + { .mbps = 500, .reg = 0x26, .min = 464, .max = 538 }, > > + { .mbps = 550, .reg = 0x37, .min = 499, .max = 590 }, > > + { .mbps = 600, .reg = 0x07, .min = 559, .max = 643 }, > > + { .mbps = 650, .reg = 0x18, .min = 606, .max = 695 }, > > + { .mbps = 700, .reg = 0x28, .min = 654, .max = 748 }, > > + { .mbps = 750, .reg = 0x39, .min = 701, .max = 800 }, > > + { .mbps = 800, .reg = 0x09, .min = 749, .max = 853 }, > > + { .mbps = 850, .reg = 0x19, .min = 796, .max = 905 }, > > + { .mbps = 900, .reg = 0x29, .min = 844, .max = 958 }, > > + { .mbps = 950, .reg = 0x3a, .min = 891, .max = 1010 }, > > + { .mbps = 1000, .reg = 0x0a, .min = 939, .max = 1063 }, > > + { .mbps = 1050, .reg = 0x1a, .min = 986, .max = 1115 }, > > + { .mbps = 1100, .reg = 0x2a, .min = 1034, .max = 1168 }, > > + { .mbps = 1150, .reg = 0x3b, .min = 1081, .max = 1220 }, > > + { .mbps = 1200, .reg = 0x0b, .min = 1129, .max = 1273 }, > > + { .mbps = 1250, .reg = 0x1b, .min = 1176, .max = 1325 }, > > + { .mbps = 1300, .reg = 0x2b, .min = 1212, .max = 1378 }, > > + { .mbps = 1350, .reg = 0x3c, .min = 1271, .max = 1430 }, > > + { .mbps = 1400, .reg = 0x0c, .min = 1319, .max = 1483 }, > > + { .mbps = 1450, .reg = 0x1c, .min = 1366, .max = 1500 }, > > + { .mbps = 1500, .reg = 0x2c, .min = 1414, .max = 1500 }, > > { /* sentinel */ }, > > }; > > > > static const struct rcsi2_mbps_reg hsfreqrange_m3w_h3es1[] = { > > - { .mbps = 80, .reg = 0x00 }, > > - { .mbps = 90, .reg = 0x10 }, > > - { .mbps = 100, .reg = 0x20 }, > > - { .mbps = 110, .reg = 0x30 }, > > - { .mbps = 120, .reg = 0x01 }, > > - { .mbps = 130, .reg = 0x11 }, > > - { .mbps = 140, .reg = 0x21 }, > > - { .mbps = 150, .reg = 0x31 }, > > - { .mbps = 160, .reg = 0x02 }, > > - { .mbps = 170, .reg = 0x12 }, > > - { .mbps = 180, .reg = 0x22 }, > > - { .mbps = 190, .reg = 0x32 }, > > - { .mbps = 205, .reg = 0x03 }, > > - { .mbps = 220, .reg = 0x13 }, > > - { .mbps = 235, .reg = 0x23 }, > > - { .mbps = 250, .reg = 0x33 }, > > - { .mbps = 275, .reg = 0x04 }, > > - { .mbps = 300, .reg = 0x14 }, > > - { .mbps = 325, .reg = 0x05 }, > > - { .mbps = 350, .reg = 0x15 }, > > - { .mbps = 400, .reg = 0x25 }, > > - { .mbps = 450, .reg = 0x06 }, > > - { .mbps = 500, .reg = 0x16 }, > > - { .mbps = 550, .reg = 0x07 }, > > - { .mbps = 600, .reg = 0x17 }, > > - { .mbps = 650, .reg = 0x08 }, > > - { .mbps = 700, .reg = 0x18 }, > > - { .mbps = 750, .reg = 0x09 }, > > - { .mbps = 800, .reg = 0x19 }, > > - { .mbps = 850, .reg = 0x29 }, > > - { .mbps = 900, .reg = 0x39 }, > > - { .mbps = 950, .reg = 0x0a }, > > - { .mbps = 1000, .reg = 0x1a }, > > - { .mbps = 1050, .reg = 0x2a }, > > - { .mbps = 1100, .reg = 0x3a }, > > - { .mbps = 1150, .reg = 0x0b }, > > - { .mbps = 1200, .reg = 0x1b }, > > - { .mbps = 1250, .reg = 0x2b }, > > - { .mbps = 1300, .reg = 0x3b }, > > - { .mbps = 1350, .reg = 0x0c }, > > - { .mbps = 1400, .reg = 0x1c }, > > - { .mbps = 1450, .reg = 0x2c }, > > - { .mbps = 1500, .reg = 0x3c }, > > + { .mbps = 80, .reg = 0x00, .min = 80, .max = 110 }, > > + { .mbps = 90, .reg = 0x10, .min = 80, .max = 120 }, > > + { .mbps = 100, .reg = 0x20, .min = 80, .max = 131 }, > > + { .mbps = 110, .reg = 0x30, .min = 81, .max = 141 }, > > + { .mbps = 120, .reg = 0x01, .min = 91, .max = 152 }, > > + { .mbps = 130, .reg = 0x11, .min = 100, .max = 162 }, > > + { .mbps = 140, .reg = 0x21, .min = 110, .max = 173 }, > > + { .mbps = 150, .reg = 0x31, .min = 119, .max = 183 }, > > + { .mbps = 160, .reg = 0x02, .min = 129, .max = 194 }, > > + { .mbps = 170, .reg = 0x12, .min = 138, .max = 204 }, > > + { .mbps = 180, .reg = 0x22, .min = 148, .max = 215 }, > > + { .mbps = 190, .reg = 0x32, .min = 157, .max = 225 }, > > + { .mbps = 205, .reg = 0x03, .min = 171, .max = 241 }, > > + { .mbps = 220, .reg = 0x13, .min = 186, .max = 257 }, > > + { .mbps = 235, .reg = 0x23, .min = 200, .max = 273 }, > > + { .mbps = 250, .reg = 0x33, .min = 238, .max = 276 }, > > + { .mbps = 275, .reg = 0x04, .min = 250, .max = 301 }, > > + { .mbps = 300, .reg = 0x14, .min = 274, .max = 328 }, > > + { .mbps = 325, .reg = 0x05, .min = 297, .max = 354 }, > > + { .mbps = 350, .reg = 0x15, .min = 321, .max = 393 }, > > + { .mbps = 400, .reg = 0x25, .min = 357, .max = 446 }, > > + { .mbps = 450, .reg = 0x06, .min = 404, .max = 498 }, > > + { .mbps = 500, .reg = 0x16, .min = 452, .max = 551 }, > > + { .mbps = 550, .reg = 0x07, .min = 499, .max = 603 }, > > + { .mbps = 600, .reg = 0x17, .min = 547, .max = 656 }, > > + { .mbps = 650, .reg = 0x08, .min = 594, .max = 708 }, > > + { .mbps = 700, .reg = 0x18, .min = 642, .max = 761 }, > > + { .mbps = 750, .reg = 0x09, .min = 689, .max = 813 }, > > + { .mbps = 800, .reg = 0x19, .min = 737, .max = 866 }, > > + { .mbps = 850, .reg = 0x29, .min = 784, .max = 918 }, > > + { .mbps = 900, .reg = 0x39, .min = 832, .max = 971 }, > > + { .mbps = 950, .reg = 0x0a, .min = 879, .max = 1023 }, > > + { .mbps = 1000, .reg = 0x1a, .min = 927, .max = 1076 }, > > + { .mbps = 1050, .reg = 0x2a, .min = 974, .max = 1128 }, > > + { .mbps = 1100, .reg = 0x3a, .min = 1022, .max = 1181 }, > > + { .mbps = 1150, .reg = 0x0b, .min = 1069, .max = 1233 }, > > + { .mbps = 1200, .reg = 0x1b, .min = 1117, .max = 1286 }, > > + { .mbps = 1250, .reg = 0x2b, .min = 1164, .max = 1338 }, > > + { .mbps = 1300, .reg = 0x3b, .min = 1212, .max = 1391 }, > > + { .mbps = 1350, .reg = 0x0c, .min = 1259, .max = 1443 }, > > + { .mbps = 1400, .reg = 0x1c, .min = 1307, .max = 1496 }, > > + { .mbps = 1450, .reg = 0x2c, .min = 1354, .max = 1500 }, > > + { .mbps = 1500, .reg = 0x3c, .min = 1402, .max = 1500 }, > > { /* sentinel */ }, > > }; > > > > @@ -430,11 +432,18 @@ static int rcsi2_wait_phy_start(struct rcar_csi2 *priv) > > > > static int rcsi2_set_phypll(struct rcar_csi2 *priv, unsigned int mbps) > > { > > - const struct rcsi2_mbps_reg *hsfreq; > > + const struct rcsi2_mbps_reg *hsfreq, *hsfreq_prev = NULL; > > > > - for (hsfreq = priv->info->hsfreqrange; hsfreq->mbps != 0; hsfreq++) > > + for (hsfreq = priv->info->hsfreqrange; hsfreq->mbps != 0; hsfreq++) { > > if (hsfreq->mbps >= mbps) > > break; > > + hsfreq_prev = hsfreq; > > + } > > + > > + if (hsfreq_prev && > > + ((mbps - hsfreq_prev->mbps) <= (hsfreq->mbps - mbps)) && > > + (hsfreq_prev->max >= mbps && hsfreq_prev->min <= mbps)) > > + hsfreq = hsfreq_prev; > > Would it be possible to rework this to get rid of the mbps variable from > strcut rcsi2_mbps_reg? I'm thinking of making the logic selecting the > first entry in the table where mbps argument falls between the min and > max values introduced in this patch. > > > > > if (!hsfreq->mbps) { > > dev_err(priv->dev, "Unsupported PHY speed (%u Mbps)", mbps); > > -- > > 2.7.4 > > > > -- > Regards, > Niklas Söderlund -- Regards, Niklas Söderlund