[v3,0/9] Add RZ/G2L Display clock support

This patch series aims to add display clock support on RZ/G2L SMARC EVK platform. The output from DSI is connected to ADV7535. Implementation details:- PLL5 generates 2 clock sources, FOUTPOSTDIV and FOUT1PH0 and vclk is sourced through DSI divider which is connected to a mux with the above clock sources. Pll5-->Mux->DSI divider--> vclk. DSI mode and DPI mode needs different set of PLL5 parameters for generating the video clock. Currently we support only DSI mode. later plan to extend this support to DPI mode. V2->v3: * Added Rb tag from Geert for patch#1 * Dropped the blank line abd defined variables in reverse Xmas tree order in get_vclk_parent_rate() * Added macro MAX_VCLK_FREQ and rate is checked against this macro in determine_rate and set_rate V1->v2: * Added Rb tag from Geert for patch#1 and #2 * Added code comments related to clk handling for patch#1, #2 and #3 * Split struct rzg2l_pll5_param and added struct rzg2l_pll5_mux_dsi_div_param for priv. * Added {get_foutpostdiv_rate, get_vclk_rate,get_vclk_parent_rate} helper functions * used div_u64 to avoid overflow on 32 bit systems * Added CPG_SIPLL5_STBY_DOWNSPREAD_WEN macro * Added pl5_spread and updated CPG_SIPLL5_CLK5 setting. * used div_u64 to avoid overflow on 32 bit systems * Update rate variable during set_rate RFC->V1: * Replaced LUT with an equation for computing pll5 parameters for generating vclk. * Replaced magic numbers with macros. * Added Rb tag from Geert. RFC: * https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220112174612.10773-2-biju.das.jz@bp.renesas.com/ * https://patchwork.kernel.org/project/linux-renesas-soc/patch/20220112174612.10773-3-biju.das.jz@bp.renesas.com/ Logs:- Clock tree output with monitor connected at 1080p@60Hz: root@smarc-rzg2l:~# cat /sys/kernel/debug/clk/clk_summary enable prepare protect duty hardware clock count count count rate accuracy phase cycle enable ------------------------------------------------------------------------------------------------------- audio_mclock 0 0 0 11289600 0 0 50000 Y extal 5 5 0 24000000 0 0 50000 Y .pll5_foutpostdiv 2 2 0 1776000000 0 0 50000 Y M1 1 1 0 1776000000 0 0 50000 Y dsi_pll_clk 1 1 0 1776000000 0 0 50000 Y .pll5_fout1ph0 1 1 0 888000000 0 0 50000 Y .sel_pll5_4 1 1 0 888000000 0 0 50000 Y DSI_DIV 1 1 0 148500000 0 0 50000 Y M3 2 2 0 148500000 0 0 50000 Y lcdc_clk_d 3 4 0 148500000 0 0 50000 Y dsi_vclk 1 1 0 148500000 0 0 50000 Y .pll6 2 2 0 500000000 0 0 50000 Y .sel_gpu2 1 1 0 500000000 0 0 50000 Y G 1 1 0 62500000 0 0 50000 Y gpu_clk 1 2 0 62500000 0 0 50000 Y .pll6_250 1 1 0 250000000 0 0 50000 Y HP 2 2 0 250000000 0 0 50000 Y .pll5 0 0 0 3000000000 0 0 50000 Y .pll5_fout3 0 0 0 500000000 0 0 50000 Y .pll5_250 0 0 0 250000000 0 0 50000 Y .pll3 2 2 0 1600000000 0 0 50000 Y .pll3_div2 1 1 0 800000000 0 0 50000 Y .pll3_div2_4 3 3 0 200000000 0 0 50000 Y M0 3 3 0 200000000 0 0 50000 Y eth1_axi 1 1 0 200000000 0 0 50000 Y eth0_axi 1 1 0 200000000 0 0 50000 Y lcdc_a 3 4 0 200000000 0 0 50000 Y P1 12 13 0 200000000 0 0 50000 Y usb_pclk 8 12 0 200000000 0 0 50000 Y usb0_func 1 1 0 200000000 0 0 50000 Y usb1_host 3 5 0 200000000 0 0 50000 Y usb0_host 3 5 0 200000000 0 0 50000 Y dsi_aclk 1 1 0 200000000 0 0 50000 Y gpu_ace_clk 0 1 0 200000000 0 0 50000 N gpu_axi_clk 1 2 0 200000000 0 0 50000 Y sdhi1_aclk 1 1 0 200000000 0 0 50000 Y sdhi0_aclk 1 1 0 200000000 0 0 50000 Y dmac_aclk 2 2 0 200000000 0 0 50000 Y ia55_clk 1 1 0 200000000 0 0 50000 Y gic 1 1 0 200000000 0 0 50000 Y P1_DIV2 1 1 0 100000000 0 0 50000 Y dmac_pclk 1 1 0 100000000 0 0 50000 Y .pll3_div2_4_2 2 2 0 100000000 0 0 50000 Y ZT 3 3 0 100000000 0 0 50000 Y eth1_chi 1 1 0 100000000 0 0 50000 Y eth0_chi 1 1 0 100000000 0 0 50000 Y lcdc_p 3 4 0 100000000 0 0 50000 Y P2 1 1 0 100000000 0 0 50000 Y dsi_pclk 1 1 0 100000000 0 0 50000 Y ia55_pclk 0 0 0 100000000 0 0 50000 N .pll3_div2_2 0 0 0 400000000 0 0 50000 Y .pll3_533 1 2 0 533333333 0 0 50000 Y M2 1 1 0 266666666 0 0 50000 Y M2_DIV2 1 1 0 133333333 0 0 50000 Y dsi_sys_clk 1 1 0 133333333 0 0 50000 Y .sel_pll3_3 0 1 0 533333333 0 0 50000 Y divpl3c 0 2 0 266666667 0 0 50000 Y SPI1 0 1 0 66666666 0 0 50000 Y spi_clk2 0 1 0 66666666 0 0 50000 N SPI0 0 1 0 133333333 0 0 50000 Y spi_clk 0 1 0 133333333 0 0 50000 N .pll3_400 0 0 0 400000000 0 0 50000 Y .pll2 3 3 0 1600000000 0 0 50000 Y .clk_533 0 0 0 533333333 0 0 50000 Y .clk_266 0 0 0 266666666 0 0 50000 Y .clk_800 1 1 0 800000000 0 0 50000 Y .clk_400 2 2 0 400000000 0 0 50000 Y sd1 2 2 0 400000000 0 0 50000 Y sdhi1_clk_hs 1 1 0 400000000 0 0 50000 Y SD1_DIV4 2 2 0 100000000 0 0 50000 Y sdhi1_imclk2 2 2 0 100000000 0 0 50000 Y sdhi1_imclk 1 1 0 100000000 0 0 50000 Y sd0 2 2 0 400000000 0 0 50000 Y sdhi0_clk_hs 1 1 0 400000000 0 0 50000 Y SD0_DIV4 2 2 0 100000000 0 0 50000 Y sdhi0_imclk2 2 2 0 100000000 0 0 50000 Y sdhi0_imclk 1 1 0 100000000 0 0 50000 Y .pll2_div2 2 2 0 800000000 0 0 50000 Y .pll2_div2_10 1 1 0 80000000 0 0 50000 Y TSU 1 2 0 80000000 0 0 50000 Y tsu_pclk 1 1 0 80000000 0 0 50000 Y adc_adclk 0 1 0 80000000 0 0 50000 N .pll2_div2_8 1 1 0 100000000 0 0 50000 Y P0 9 15 0 100000000 0 0 50000 Y adc_pclk 0 1 0 100000000 0 0 50000 N canfd 1 2 0 100000000 0 0 50000 Y rspi2 0 0 0 100000000 0 0 50000 N rspi1 0 1 0 100000000 0 0 50000 N rspi0 0 0 0 100000000 0 0 50000 N sci1 0 0 0 100000000 0 0 50000 N sci0 0 0 0 100000000 0 0 50000 N scif4 0 0 0 100000000 0 0 50000 N scif3 0 0 0 100000000 0 0 50000 N scif2 0 1 0 100000000 0 0 50000 N scif1 0 0 0 100000000 0 0 50000 N scif0 2 2 0 100000000 0 0 50000 Y i2c3 0 1 0 100000000 0 0 50000 N i2c2 0 0 0 100000000 0 0 50000 N i2c1 0 1 0 100000000 0 0 50000 N i2c0 0 1 0 100000000 0 0 50000 N ssi3_sfr 0 0 0 100000000 0 0 50000 N ssi3_pclk 0 0 0 100000000 0 0 50000 N ssi2_sfr 0 0 0 100000000 0 0 50000 N ssi2_pclk 0 0 0 100000000 0 0 50000 N ssi1_sfr 0 0 0 100000000 0 0 50000 N ssi1_pclk 0 0 0 100000000 0 0 50000 N ssi0_sfr 1 1 0 100000000 0 0 50000 Y ssi0_pclk 1 1 0 100000000 0 0 50000 Y wdt2_pclk 1 1 0 100000000 0 0 50000 Y wdt1_pclk 1 1 0 100000000 0 0 50000 Y wdt0_pclk 1 1 0 100000000 0 0 50000 Y ostm2_pclk 1 2 0 100000000 0 0 50000 Y ostm1_clk 1 2 0 100000000 0 0 50000 Y ostm0_pclk 0 0 0 100000000 0 0 50000 N P0_DIV2 0 0 0 50000000 0 0 50000 Y .pll2_533 1 1 0 533333333 0 0 50000 Y .pll2_533_div2 1 1 0 266666666 0 0 50000 Y .div_dsi_lpclk 1 1 0 16666667 0 0 50000 Y M4 1 1 0 16666667 0 0 50000 Y dsi_lpclk 1 1 0 16666667 0 0 50000 Y .pll1 0 0 0 1200000000 0 0 50000 Y I 0 0 0 1200000000 0 0 50000 Y .osc_div1000 0 0 0 24000 0 0 50000 Y .osc 4 4 0 24000000 0 0 50000 Y gpio 1 2 0 24000000 0 0 50000 Y wdt2_clk 1 1 0 24000000 0 0 50000 Y wdt1_clk 1 1 0 24000000 0 0 50000 Y wdt0_clk 1 1 0 24000000 0 0 50000 Y can 0 0 0 0 0 0 50000 Y audio_clk2 0 0 0 12288000 0 0 50000 Y audio_clk1 0 0 0 11289600 0 0 50000 Y root@smarc-rzg2l:~# With VGA resolution:- modetest -M rzg2l-du -d -s HDMI-A-1:640x480@AR24 root@smarc-rzg2l:~# cat /sys/kernel/debug/clk/clk_summary enable prepare protect duty hardware clock count count count rate accuracy phase cycle enable ------------------------------------------------------------------------------------------------------- audio_mclock 0 0 0 11289600 0 0 50000 Y extal 5 5 0 24000000 0 0 50000 Y .pll5_foutpostdiv 2 2 0 372000000 0 0 50000 Y M1 1 1 0 372000000 0 0 50000 Y dsi_pll_clk 1 1 0 372000000 0 0 50000 Y .pll5_fout1ph0 1 1 0 186000000 0 0 50000 Y .sel_pll5_4 1 1 0 186000000 0 0 50000 Y DSI_DIV 1 1 0 31500000 0 0 50000 Y M3 2 2 0 31500000 0 0 50000 Y lcdc_clk_d 3 4 0 31500000 0 0 50000 Y dsi_vclk 1 1 0 31500000 0 0 50000 Y Biju Das (9): clk: renesas: rzg2l: Add FOUTPOSTDIV clk support clk: renesas: rzg2l: Add PLL5_4 clk mux support clk: renesas: rzg2l: Add DSI divider clk support clk: renesas: r9a07g044: Add M1 clock support clk: renesas: r9a07g044: Add {M2, M2_DIV2} Clocks support clk: renesas: r9a07g044: Add M3 Clock support clk: renesas: r9a07g044: Add M4 Clock support clk: renesas: r9a07g044: Add LCDC clock and reset entries clk: renesas: r9a07g044: Add DSI clock and reset entries drivers/clk/renesas/r9a07g044-cpg.c | 58 +++- drivers/clk/renesas/rzg2l-cpg.c | 430 ++++++++++++++++++++++++++++ drivers/clk/renesas/rzg2l-cpg.h | 44 +++ 3 files changed, 530 insertions(+), 2 deletions(-)

Message ID	20220430114156.6260-1-biju.das.jz@bp.renesas.com (mailing list archive)
Headers	show Return-Path: <linux-clk-owner@kernel.org> From: Biju Das <biju.das.jz@bp.renesas.com> To: Michael Turquette <mturquette@baylibre.com>, Stephen Boyd <sboyd@kernel.org> Cc: Biju Das <biju.das.jz@bp.renesas.com>, Geert Uytterhoeven <geert+renesas@glider.be>, linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, Chris Paterson <Chris.Paterson2@renesas.com>, Biju Das <biju.das@bp.renesas.com>, Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@bp.renesas.com> Subject: [PATCH v3 0/9] Add RZ/G2L Display clock support Date: Sat, 30 Apr 2022 12:41:47 +0100 Message-Id: <20220430114156.6260-1-biju.das.jz@bp.renesas.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	Add RZ/G2L Display clock support \| expand [v3,0/9] Add RZ/G2L Display clock support [v3,1/9] clk: renesas: rzg2l: Add FOUTPOSTDIV clk support [v3,2/9] clk: renesas: rzg2l: Add PLL5_4 clk mux support [v3,3/9] clk: renesas: rzg2l: Add DSI divider clk support [v3,4/9] clk: renesas: r9a07g044: Add M1 clock support [v3,5/9] clk: renesas: r9a07g044: Add {M2, M2_DIV2} Clocks support [v3,6/9] clk: renesas: r9a07g044: Add M3 Clock support [v3,7/9] clk: renesas: r9a07g044: Add M4 Clock support [v3,8/9] clk: renesas: r9a07g044: Add LCDC clock and reset entries [v3,9/9] clk: renesas: r9a07g044: Add DSI clock and reset entries

[v3,0/9] Add RZ/G2L Display clock support

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