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X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:3::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.whiteo.stw.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-5.0 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 1/6] clk: imx8mp: add 700 MHz rate entry for VIDEO_PLL1 X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.whiteo.stw.pengutronix.de) From: Thomas Haemmerle The LVDS serializer requires link_freq = pixel_clock × 7. For a 25 MHz pixel clock the link frequency is 175 MHz. VIDEO_PLL1 must be set to 700 MHz so the divider chain (VIDEO_PLL1 / 4 = 175 MHz) produces an exact match; without it clk_set_rate() rounds down to 650 MHz, yielding only 162.5 MHz and causing the LVDS transmitter to output ~743 pixels per line instead of 800 — visible as a black strip on the right edge. PLL parameters: Fin=24 MHz, P=3, S=2, K=0 → 24 × 350 / (3 × 4) = 700 MHz. Assisted-by: Claude:claude-sonnet-4-6 Signed-of-by: Thomas Haemmerle --- drivers/clk/imx/clk-pll14xx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clk/imx/clk-pll14xx.c b/drivers/clk/imx/clk-pll14xx.c index 6716a6f555..db7e744e87 100644 --- a/drivers/clk/imx/clk-pll14xx.c +++ b/drivers/clk/imx/clk-pll14xx.c @@ -61,6 +61,7 @@ static const struct imx_pll14xx_rate_table imx_pll1416x_tbl[] = { }; static const struct imx_pll14xx_rate_table imx_pll1443x_tbl[] = { + PLL_1443X_RATE(700000000U, 350, 3, 2, 0), PLL_1443X_RATE(650000000U, 325, 3, 2, 0), PLL_1443X_RATE(594000000U, 198, 2, 2, 0), PLL_1443X_RATE(393216000U, 262, 2, 3, 9437), base-commit: 81fbe2e8d0d445032498a0bfecf9fd270f00985a -- 2.43.0