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Message-ID: <Y4ZE8gcH7E3Pad68@pendragon.ideasonboard.com>
Date: Tue, 29 Nov 2022 19:44:18 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
Cc: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Magnus Damm <magnus.damm@...il.com>,
dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <robert.foss@...aro.org>,
Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>
Subject: Re: [PATCH v3 7/7] drm: rcar-du: dsi: Add r8A779g0 support
Hi Tomi,
Thank you for the patch.
On Tue, Nov 29, 2022 at 03:41:38PM +0200, Tomi Valkeinen wrote:
> Add DSI support for r8a779g0. The main differences to r8a779a0 are in
> the PLL and PHTW setups.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
> ---
> Changes to v2:
> - Use MHZ() in the tables, with floating point values as inputs
> - Use V3U/V4H names instead of R8A779A0/R8A779G0
> - PLL diffs between V3U and V4H are now described in struct
> rcar_mipi_dsi_device_info, and we have a single function to calculate
> the pll settings.
> - Refactor fin_rate to outside the pll calc functions.
> - Fixed the PLL config debug print.
> - Dropped clockset2_n_offset, which is always 1
>
> drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c | 499 ++++++++++++++-----
> drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h | 6 +-
> 2 files changed, 377 insertions(+), 128 deletions(-)
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
> index a7f2b7f66a17..3b812ec034fe 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c
> @@ -9,6 +9,7 @@
> #include <linux/delay.h>
> #include <linux/io.h>
> #include <linux/iopoll.h>
> +#include <linux/math64.h>
> #include <linux/module.h>
> #include <linux/of.h>
> #include <linux/of_device.h>
> @@ -28,6 +29,31 @@
> #include "rcar_mipi_dsi.h"
> #include "rcar_mipi_dsi_regs.h"
>
> +#define MHZ(v) ((u32)((v) * 1000000U))
> +
> +enum rcar_mipi_dsi_hw_model {
> + RCAR_DSI_V3U,
> + RCAR_DSI_V4H,
> +};
> +
> +struct rcar_mipi_dsi_device_info {
> + enum rcar_mipi_dsi_hw_model model;
> +
> + const struct dsi_clk_config *clk_cfg;
> +
> + u8 clockset2_m_offset;
> +
> + u8 n_min;
> + u8 n_max;
> + u8 n_mul;
> + unsigned long fpfd_min;
> + unsigned long fpfd_max;
> + u16 m_min;
> + u16 m_max;
> + unsigned long fout_min;
> + unsigned long fout_max;
> +};
> +
> struct rcar_mipi_dsi {
> struct device *dev;
> const struct rcar_mipi_dsi_device_info *info;
> @@ -50,6 +76,17 @@ struct rcar_mipi_dsi {
> unsigned int lanes;
> };
>
> +struct dsi_setup_info {
> + unsigned long hsfreq;
> + u16 hsfreqrange;
> +
> + unsigned long fout;
> + u16 m;
> + u16 n;
> + u16 vclk_divider;
> + const struct dsi_clk_config *clkset;
> +};
> +
> static inline struct rcar_mipi_dsi *
> bridge_to_rcar_mipi_dsi(struct drm_bridge *bridge)
> {
> @@ -62,65 +99,78 @@ host_to_rcar_mipi_dsi(struct mipi_dsi_host *host)
> return container_of(host, struct rcar_mipi_dsi, host);
> }
>
> -static const u32 phtw[] = {
> - 0x01020114, 0x01600115, /* General testing */
> - 0x01030116, 0x0102011d, /* General testing */
> - 0x011101a4, 0x018601a4, /* 1Gbps testing */
> - 0x014201a0, 0x010001a3, /* 1Gbps testing */
> - 0x0101011f, /* 1Gbps testing */
> -};
> -
> -static const u32 phtw2[] = {
> - 0x010c0130, 0x010c0140, /* General testing */
> - 0x010c0150, 0x010c0180, /* General testing */
> - 0x010c0190,
> - 0x010a0160, 0x010a0170,
> - 0x01800164, 0x01800174, /* 1Gbps testing */
> -};
> -
> static const u32 hsfreqrange_table[][2] = {
> - { 80000000U, 0x00 }, { 90000000U, 0x10 }, { 100000000U, 0x20 },
> - { 110000000U, 0x30 }, { 120000000U, 0x01 }, { 130000000U, 0x11 },
> - { 140000000U, 0x21 }, { 150000000U, 0x31 }, { 160000000U, 0x02 },
> - { 170000000U, 0x12 }, { 180000000U, 0x22 }, { 190000000U, 0x32 },
> - { 205000000U, 0x03 }, { 220000000U, 0x13 }, { 235000000U, 0x23 },
> - { 250000000U, 0x33 }, { 275000000U, 0x04 }, { 300000000U, 0x14 },
> - { 325000000U, 0x25 }, { 350000000U, 0x35 }, { 400000000U, 0x05 },
> - { 450000000U, 0x16 }, { 500000000U, 0x26 }, { 550000000U, 0x37 },
> - { 600000000U, 0x07 }, { 650000000U, 0x18 }, { 700000000U, 0x28 },
> - { 750000000U, 0x39 }, { 800000000U, 0x09 }, { 850000000U, 0x19 },
> - { 900000000U, 0x29 }, { 950000000U, 0x3a }, { 1000000000U, 0x0a },
> - { 1050000000U, 0x1a }, { 1100000000U, 0x2a }, { 1150000000U, 0x3b },
> - { 1200000000U, 0x0b }, { 1250000000U, 0x1b }, { 1300000000U, 0x2b },
> - { 1350000000U, 0x3c }, { 1400000000U, 0x0c }, { 1450000000U, 0x1c },
> - { 1500000000U, 0x2c }, { 1550000000U, 0x3d }, { 1600000000U, 0x0d },
> - { 1650000000U, 0x1d }, { 1700000000U, 0x2e }, { 1750000000U, 0x3e },
> - { 1800000000U, 0x0e }, { 1850000000U, 0x1e }, { 1900000000U, 0x2f },
> - { 1950000000U, 0x3f }, { 2000000000U, 0x0f }, { 2050000000U, 0x40 },
> - { 2100000000U, 0x41 }, { 2150000000U, 0x42 }, { 2200000000U, 0x43 },
> - { 2250000000U, 0x44 }, { 2300000000U, 0x45 }, { 2350000000U, 0x46 },
> - { 2400000000U, 0x47 }, { 2450000000U, 0x48 }, { 2500000000U, 0x49 },
> + { MHZ(80), 0x00 }, { MHZ(90), 0x10 }, { MHZ(100), 0x20 },
> + { MHZ(110), 0x30 }, { MHZ(120), 0x01 }, { MHZ(130), 0x11 },
> + { MHZ(140), 0x21 }, { MHZ(150), 0x31 }, { MHZ(160), 0x02 },
> + { MHZ(170), 0x12 }, { MHZ(180), 0x22 }, { MHZ(190), 0x32 },
> + { MHZ(205), 0x03 }, { MHZ(220), 0x13 }, { MHZ(235), 0x23 },
> + { MHZ(250), 0x33 }, { MHZ(275), 0x04 }, { MHZ(300), 0x14 },
> + { MHZ(325), 0x25 }, { MHZ(350), 0x35 }, { MHZ(400), 0x05 },
> + { MHZ(450), 0x16 }, { MHZ(500), 0x26 }, { MHZ(550), 0x37 },
> + { MHZ(600), 0x07 }, { MHZ(650), 0x18 }, { MHZ(700), 0x28 },
> + { MHZ(750), 0x39 }, { MHZ(800), 0x09 }, { MHZ(850), 0x19 },
> + { MHZ(900), 0x29 }, { MHZ(950), 0x3a }, { MHZ(1000), 0x0a },
> + { MHZ(1050), 0x1a }, { MHZ(1100), 0x2a }, { MHZ(1150), 0x3b },
> + { MHZ(1200), 0x0b }, { MHZ(1250), 0x1b }, { MHZ(1300), 0x2b },
> + { MHZ(1350), 0x3c }, { MHZ(1400), 0x0c }, { MHZ(1450), 0x1c },
> + { MHZ(1500), 0x2c }, { MHZ(1550), 0x3d }, { MHZ(1600), 0x0d },
> + { MHZ(1650), 0x1d }, { MHZ(1700), 0x2e }, { MHZ(1750), 0x3e },
> + { MHZ(1800), 0x0e }, { MHZ(1850), 0x1e }, { MHZ(1900), 0x2f },
> + { MHZ(1950), 0x3f }, { MHZ(2000), 0x0f }, { MHZ(2050), 0x40 },
> + { MHZ(2100), 0x41 }, { MHZ(2150), 0x42 }, { MHZ(2200), 0x43 },
> + { MHZ(2250), 0x44 }, { MHZ(2300), 0x45 }, { MHZ(2350), 0x46 },
> + { MHZ(2400), 0x47 }, { MHZ(2450), 0x48 }, { MHZ(2500), 0x49 },
> { /* sentinel */ },
> };
>
> -struct vco_cntrl_value {
> +struct dsi_clk_config {
> u32 min_freq;
> u32 max_freq;
> - u16 value;
> + u8 vco_cntrl;
> + u8 cpbias_cntrl;
> + u8 gmp_cntrl;
> + u8 int_cntrl;
> + u8 prop_cntrl;
> };
>
> -static const struct vco_cntrl_value vco_cntrl_table[] = {
> - { .min_freq = 40000000U, .max_freq = 55000000U, .value = 0x3f },
> - { .min_freq = 52500000U, .max_freq = 80000000U, .value = 0x39 },
> - { .min_freq = 80000000U, .max_freq = 110000000U, .value = 0x2f },
> - { .min_freq = 105000000U, .max_freq = 160000000U, .value = 0x29 },
> - { .min_freq = 160000000U, .max_freq = 220000000U, .value = 0x1f },
> - { .min_freq = 210000000U, .max_freq = 320000000U, .value = 0x19 },
> - { .min_freq = 320000000U, .max_freq = 440000000U, .value = 0x0f },
> - { .min_freq = 420000000U, .max_freq = 660000000U, .value = 0x09 },
> - { .min_freq = 630000000U, .max_freq = 1149000000U, .value = 0x03 },
> - { .min_freq = 1100000000U, .max_freq = 1152000000U, .value = 0x01 },
> - { .min_freq = 1150000000U, .max_freq = 1250000000U, .value = 0x01 },
> +static const struct dsi_clk_config dsi_clk_cfg_v3u[] = {
> + { MHZ(40), MHZ(55), 0x3f, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(52.5), MHZ(80), 0x39, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(80), MHZ(110), 0x2f, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(105), MHZ(160), 0x29, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(160), MHZ(220), 0x1f, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(210), MHZ(320), 0x19, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(320), MHZ(440), 0x0f, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(420), MHZ(660), 0x09, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(630), MHZ(1149), 0x03, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(1100), MHZ(1152), 0x01, 0x10, 0x01, 0x00, 0x0b },
> + { MHZ(1150), MHZ(1250), 0x01, 0x10, 0x01, 0x00, 0x0c },
> + { /* sentinel */ },
> +};
> +
> +static const struct dsi_clk_config dsi_clk_cfg_v4h[] = {
> + { MHZ(40), MHZ(45.31), 0x2b, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(45.31), MHZ(54.66), 0x28, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(54.66), MHZ(62.5), 0x28, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(62.5), MHZ(75), 0x27, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(75), MHZ(90.63), 0x23, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(90.63), MHZ(109.37), 0x20, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(109.37), MHZ(125), 0x20, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(125), MHZ(150), 0x1f, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(150), MHZ(181.25), 0x1b, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(181.25), MHZ(218.75), 0x18, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(218.75), MHZ(250), 0x18, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(250), MHZ(300), 0x17, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(300), MHZ(362.5), 0x13, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(362.5), MHZ(455.48), 0x10, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(455.48), MHZ(500), 0x10, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(500), MHZ(600), 0x0f, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(600), MHZ(725), 0x0b, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(725), MHZ(875), 0x08, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(875), MHZ(1000), 0x08, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(1000), MHZ(1200), 0x07, 0x00, 0x00, 0x08, 0x0a },
> + { MHZ(1200), MHZ(1250), 0x03, 0x00, 0x00, 0x08, 0x0a },
That's nicer :-)
> { /* sentinel */ },
> };
>
> @@ -144,7 +194,7 @@ static void rcar_mipi_dsi_set(struct rcar_mipi_dsi *dsi, u32 reg, u32 set)
> rcar_mipi_dsi_write(dsi, reg, rcar_mipi_dsi_read(dsi, reg) | set);
> }
>
> -static int rcar_mipi_dsi_phtw_test(struct rcar_mipi_dsi *dsi, u32 phtw)
> +static int rcar_mipi_dsi_write_phtw(struct rcar_mipi_dsi *dsi, u32 phtw)
> {
> u32 status;
> int ret;
> @@ -163,32 +213,181 @@ static int rcar_mipi_dsi_phtw_test(struct rcar_mipi_dsi *dsi, u32 phtw)
> return ret;
> }
>
> +static int rcar_mipi_dsi_write_phtw_arr(struct rcar_mipi_dsi *dsi,
> + const u32 *phtw, unsigned int size)
> +{
> + for (unsigned int i = 0; i < size; i++) {
> + int ret = rcar_mipi_dsi_write_phtw(dsi, phtw[i]);
> +
> + if (ret < 0)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +#define WRITE_PHTW(...) \
> + ({ \
> + static const u32 phtw[] = { __VA_ARGS__ }; \
> + int ret; \
> + ret = rcar_mipi_dsi_write_phtw_arr(dsi, phtw, \
> + ARRAY_SIZE(phtw)); \
> + ret; \
> + })
> +
> +static int rcar_mipi_dsi_init_phtw_v3u(struct rcar_mipi_dsi *dsi)
> +{
> + return WRITE_PHTW(0x01020114, 0x01600115, 0x01030116, 0x0102011d,
> + 0x011101a4, 0x018601a4, 0x014201a0, 0x010001a3,
> + 0x0101011f);
> +}
> +
> +static int rcar_mipi_dsi_post_init_phtw_v3u(struct rcar_mipi_dsi *dsi)
> +{
> + return WRITE_PHTW(0x010c0130, 0x010c0140, 0x010c0150, 0x010c0180,
> + 0x010c0190, 0x010a0160, 0x010a0170, 0x01800164,
> + 0x01800174);
> +}
> +
> +static int rcar_mipi_dsi_init_phtw_v4h(struct rcar_mipi_dsi *dsi,
> + const struct dsi_setup_info *setup_info)
> +{
> + int ret;
> +
> + if (setup_info->hsfreq < MHZ(450)) {
> + ret = WRITE_PHTW(0x01010100, 0x011b01ac);
> + if (ret)
> + return ret;
> + }
> +
> + ret = WRITE_PHTW(0x01010100, 0x01030173, 0x01000174, 0x01500175,
> + 0x01030176, 0x01040166, 0x010201ad);
> + if (ret)
> + return ret;
> +
> + if (setup_info->hsfreq <= MHZ(1000))
> + ret = WRITE_PHTW(0x01020100, 0x01910170, 0x01020171,
> + 0x01110172);
> + else if (setup_info->hsfreq <= MHZ(1500))
> + ret = WRITE_PHTW(0x01020100, 0x01980170, 0x01030171,
> + 0x01100172);
> + else if (setup_info->hsfreq <= MHZ(2500))
> + ret = WRITE_PHTW(0x01020100, 0x0144016b, 0x01000172);
> + else
> + return -EINVAL;
> +
> + if (ret)
> + return ret;
> +
> + if (dsi->lanes <= 1) {
> + ret = WRITE_PHTW(0x01070100, 0x010e010b);
> + if (ret)
> + return ret;
> + }
> +
> + if (dsi->lanes <= 2) {
> + ret = WRITE_PHTW(0x01090100, 0x010e010b);
> + if (ret)
> + return ret;
> + }
> +
> + if (dsi->lanes <= 3) {
> + ret = WRITE_PHTW(0x010b0100, 0x010e010b);
> + if (ret)
> + return ret;
> + }
> +
> + if (setup_info->hsfreq <= MHZ(1500)) {
> + ret = WRITE_PHTW(0x01010100, 0x01c0016e);
> + if (ret)
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static int
> +rcar_mipi_dsi_post_init_phtw_v4h(struct rcar_mipi_dsi *dsi,
> + const struct dsi_setup_info *setup_info)
> +{
> + u32 status;
> + int ret;
> +
> + if (setup_info->hsfreq <= MHZ(1500)) {
> + WRITE_PHTW(0x01020100, 0x00000180);
> +
> + ret = read_poll_timeout(rcar_mipi_dsi_read, status,
> + status & PHTR_TEST, 2000, 10000, false,
> + dsi, PHTR);
> + if (ret < 0) {
> + dev_err(dsi->dev, "failed to test PHTR\n");
> + return ret;
> + }
> +
> + WRITE_PHTW(0x01010100, 0x0100016e);
> + }
> +
> + return 0;
> +}
> +
> /* -----------------------------------------------------------------------------
> * Hardware Setup
> */
>
> -struct dsi_setup_info {
> - unsigned long fout;
> - u16 vco_cntrl;
> - u16 prop_cntrl;
> - u16 hsfreqrange;
> - u16 div;
> - unsigned int m;
> - unsigned int n;
> -};
> +static void rcar_mipi_dsi_pll_calc(struct rcar_mipi_dsi *dsi,
> + unsigned long fin_rate,
> + unsigned long fout_target,
> + struct dsi_setup_info *setup_info)
> +{
> + unsigned int best_err = -1;
> + const struct rcar_mipi_dsi_device_info *info = dsi->info;
> +
> + for (unsigned int n = info->n_min; n <= info->n_max; n++) {
> + unsigned long fpfd;
> +
> + fpfd = fin_rate / n;
> +
> + if (fpfd < info->fpfd_min || fpfd > info->fpfd_max)
> + continue;
> +
> + for (unsigned int m = info->m_min; m <= info->m_max; m++) {
> + unsigned int err;
> + u64 fout;
> +
> + fout = div64_u64((u64)fpfd * m, dsi->info->n_mul);
> +
> + if (fout < info->fout_min || fout > info->fout_max)
> + continue;
> +
> + fout = div64_u64(fout, setup_info->vclk_divider);
> +
> + if (fout < setup_info->clkset->min_freq ||
> + fout > setup_info->clkset->max_freq)
> + continue;
> +
> + err = abs((long)(fout - fout_target) * 10000 /
> + (long)fout_target);
> + if (err < best_err) {
> + setup_info->m = m;
> + setup_info->n = n;
> + setup_info->fout = (unsigned long)fout;
> + best_err = err;
> +
> + if (err == 0)
> + return;
> + }
> + }
> + }
This is potentially a large number of iterations, it would be nice to
optimize it, but not now.
> +}
>
> static void rcar_mipi_dsi_parameters_calc(struct rcar_mipi_dsi *dsi,
> struct clk *clk, unsigned long target,
> struct dsi_setup_info *setup_info)
> {
>
> - const struct vco_cntrl_value *vco_cntrl;
> + const struct dsi_clk_config *clk_cfg;
> unsigned long fout_target;
> - unsigned long fin, fout;
> - unsigned long hsfreq;
> - unsigned int best_err = -1;
> - unsigned int divider;
> - unsigned int n;
> + unsigned long fin_rate;
> unsigned int i;
> unsigned int err;
>
> @@ -198,70 +397,55 @@ static void rcar_mipi_dsi_parameters_calc(struct rcar_mipi_dsi *dsi,
> */
> fout_target = target * mipi_dsi_pixel_format_to_bpp(dsi->format)
> / (2 * dsi->lanes);
> - if (fout_target < 40000000 || fout_target > 1250000000)
> + if (fout_target < MHZ(40) || fout_target > MHZ(1250))
> return;
>
> - /* Find vco_cntrl */
> - for (vco_cntrl = vco_cntrl_table; vco_cntrl->min_freq != 0; vco_cntrl++) {
> - if (fout_target > vco_cntrl->min_freq &&
> - fout_target <= vco_cntrl->max_freq) {
> - setup_info->vco_cntrl = vco_cntrl->value;
> - if (fout_target >= 1150000000)
> - setup_info->prop_cntrl = 0x0c;
> - else
> - setup_info->prop_cntrl = 0x0b;
> + /* Find PLL settings */
> + for (clk_cfg = dsi->info->clk_cfg; clk_cfg->min_freq != 0; clk_cfg++) {
> + if (fout_target > clk_cfg->min_freq &&
> + fout_target <= clk_cfg->max_freq) {
> + setup_info->clkset = clk_cfg;
> break;
> }
> }
>
> - /* Add divider */
> - setup_info->div = (setup_info->vco_cntrl & 0x30) >> 4;
> + fin_rate = clk_get_rate(clk);
> +
> + switch (dsi->info->model) {
> + case RCAR_DSI_V3U:
> + setup_info->vclk_divider = 1 << ((clk_cfg->vco_cntrl >> 4) & 0x3);
> + break;
> +
> + case RCAR_DSI_V4H:
> + setup_info->vclk_divider = 1 << (((clk_cfg->vco_cntrl >> 3) & 0x7) + 1);
> + break;
> +
> + default:
> + return;
Can't happen, I'd add the default label to one of the V3U or V4H label
to keep the compiler and static analyzers happy.
> + }
> +
> + rcar_mipi_dsi_pll_calc(dsi, fin_rate, fout_target, setup_info);
>
> /* Find hsfreqrange */
> - hsfreq = fout_target * 2;
> + setup_info->hsfreq = setup_info->fout * 2;
> for (i = 0; i < ARRAY_SIZE(hsfreqrange_table); i++) {
> - if (hsfreqrange_table[i][0] >= hsfreq) {
> + if (hsfreqrange_table[i][0] >= setup_info->hsfreq) {
> setup_info->hsfreqrange = hsfreqrange_table[i][1];
> break;
> }
> }
>
> - /*
> - * Calculate n and m for PLL clock
> - * Following the HW manual the ranges of n and m are
> - * n = [3-8] and m = [64-625]
> - */
> - fin = clk_get_rate(clk);
> - divider = 1 << setup_info->div;
> - for (n = 3; n < 9; n++) {
> - unsigned long fpfd;
> - unsigned int m;
> -
> - fpfd = fin / n;
> -
> - for (m = 64; m < 626; m++) {
> - fout = fpfd * m / divider;
> - err = abs((long)(fout - fout_target) * 10000 /
> - (long)fout_target);
> - if (err < best_err) {
> - setup_info->m = m - 2;
> - setup_info->n = n - 1;
> - setup_info->fout = fout;
> - best_err = err;
> - if (err == 0)
> - goto done;
> - }
> - }
> - }
> + err = abs((long)(setup_info->fout - fout_target) * 10000 / (long)fout_target);
>
> -done:
> dev_dbg(dsi->dev,
> - "%pC %lu Hz -> Fout %lu Hz (target %lu Hz, error %d.%02u%%), PLL M/N/DIV %u/%u/%u\n",
> - clk, fin, setup_info->fout, fout_target, best_err / 100,
> - best_err % 100, setup_info->m, setup_info->n, setup_info->div);
> + "Fout = %u * %lu / (%u * %u * %u) = %lu (target %lu Hz, error %d.%02u%%)\n",
> + setup_info->m, fin_rate, dsi->info->n_mul, setup_info->n,
> + setup_info->vclk_divider, setup_info->fout, fout_target,
> + err / 100, err % 100);
> +
> dev_dbg(dsi->dev,
> "vco_cntrl = 0x%x\tprop_cntrl = 0x%x\thsfreqrange = 0x%x\n",
> - setup_info->vco_cntrl, setup_info->prop_cntrl,
> + clk_cfg->vco_cntrl, clk_cfg->prop_cntrl,
> setup_info->hsfreqrange);
> }
>
> @@ -324,7 +508,7 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi,
> {
> struct dsi_setup_info setup_info = {};
> unsigned int timeout;
> - int ret, i;
> + int ret;
> int dsi_format;
> u32 phy_setup;
> u32 clockset2, clockset3;
> @@ -360,10 +544,18 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi,
> phy_setup |= PHYSETUP_HSFREQRANGE(setup_info.hsfreqrange);
> rcar_mipi_dsi_write(dsi, PHYSETUP, phy_setup);
>
> - for (i = 0; i < ARRAY_SIZE(phtw); i++) {
> - ret = rcar_mipi_dsi_phtw_test(dsi, phtw[i]);
> + switch (dsi->info->model) {
> + case RCAR_DSI_V3U:
> + ret = rcar_mipi_dsi_init_phtw_v3u(dsi);
> + if (ret < 0)
> + return ret;
> + break;
> +
> + case RCAR_DSI_V4H:
> + ret = rcar_mipi_dsi_init_phtw_v4h(dsi, &setup_info);
> if (ret < 0)
> return ret;
> + break;
> }
>
> /* PLL Clock Setting */
> @@ -371,12 +563,13 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi,
> rcar_mipi_dsi_set(dsi, CLOCKSET1, CLOCKSET1_SHADOW_CLEAR);
> rcar_mipi_dsi_clr(dsi, CLOCKSET1, CLOCKSET1_SHADOW_CLEAR);
>
> - clockset2 = CLOCKSET2_M(setup_info.m) | CLOCKSET2_N(setup_info.n)
> - | CLOCKSET2_VCO_CNTRL(setup_info.vco_cntrl);
> - clockset3 = CLOCKSET3_PROP_CNTRL(setup_info.prop_cntrl)
> - | CLOCKSET3_INT_CNTRL(0)
> - | CLOCKSET3_CPBIAS_CNTRL(0x10)
> - | CLOCKSET3_GMP_CNTRL(1);
> + clockset2 = CLOCKSET2_M(setup_info.m - dsi->info->clockset2_m_offset)
> + | CLOCKSET2_N(setup_info.n - 1)
> + | CLOCKSET2_VCO_CNTRL(setup_info.clkset->vco_cntrl);
> + clockset3 = CLOCKSET3_PROP_CNTRL(setup_info.clkset->prop_cntrl)
> + | CLOCKSET3_INT_CNTRL(setup_info.clkset->int_cntrl)
> + | CLOCKSET3_CPBIAS_CNTRL(setup_info.clkset->cpbias_cntrl)
> + | CLOCKSET3_GMP_CNTRL(setup_info.clkset->gmp_cntrl);
> rcar_mipi_dsi_write(dsi, CLOCKSET2, clockset2);
> rcar_mipi_dsi_write(dsi, CLOCKSET3, clockset3);
>
> @@ -407,10 +600,18 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi,
> return -ETIMEDOUT;
> }
>
> - for (i = 0; i < ARRAY_SIZE(phtw2); i++) {
> - ret = rcar_mipi_dsi_phtw_test(dsi, phtw2[i]);
> + switch (dsi->info->model) {
> + case RCAR_DSI_V3U:
> + ret = rcar_mipi_dsi_post_init_phtw_v3u(dsi);
> if (ret < 0)
> return ret;
> + break;
> +
> + case RCAR_DSI_V4H:
> + ret = rcar_mipi_dsi_post_init_phtw_v4h(dsi, &setup_info);
> + if (ret < 0)
> + return ret;
> + break;
> }
>
> /* Enable DOT clock */
> @@ -427,8 +628,21 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi,
> dev_warn(dsi->dev, "unsupported format");
> return -EINVAL;
> }
> - vclkset |= VCLKSET_COLOR_RGB | VCLKSET_DIV(setup_info.div)
> - | VCLKSET_LANE(dsi->lanes - 1);
> +
> + vclkset |= VCLKSET_COLOR_RGB | VCLKSET_LANE(dsi->lanes - 1);
> +
> + switch (dsi->info->model) {
> + case RCAR_DSI_V3U:
> + vclkset |= VCLKSET_DIV_V3U(__ffs(setup_info.vclk_divider));
> + break;
> +
> + case RCAR_DSI_V4H:
> + vclkset |= VCLKSET_DIV_V4H(__ffs(setup_info.vclk_divider) - 1);
> + break;
> +
> + default:
> + return -ENODEV;
Can't happen, merge the default label with one of the two labels above
(or drop it).
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
I'll let you post a v4 with the minor issues addressed, and will then
merge it in my tree.
> + }
>
> rcar_mipi_dsi_write(dsi, VCLKSET, vclkset);
>
> @@ -841,8 +1055,39 @@ static int rcar_mipi_dsi_remove(struct platform_device *pdev)
> return 0;
> }
>
> +static const struct rcar_mipi_dsi_device_info v3u_data = {
> + .model = RCAR_DSI_V3U,
> + .clk_cfg = dsi_clk_cfg_v3u,
> + .clockset2_m_offset = 2,
> + .n_min = 3,
> + .n_max = 8,
> + .n_mul = 1,
> + .fpfd_min = MHZ(2),
> + .fpfd_max = MHZ(8),
> + .m_min = 64,
> + .m_max = 625,
> + .fout_min = MHZ(320),
> + .fout_max = MHZ(1250),
> +};
> +
> +static const struct rcar_mipi_dsi_device_info v4h_data = {
> + .model = RCAR_DSI_V4H,
> + .clk_cfg = dsi_clk_cfg_v4h,
> + .clockset2_m_offset = 0,
> + .n_min = 1,
> + .n_max = 8,
> + .n_mul = 2,
> + .fpfd_min = MHZ(8),
> + .fpfd_max = MHZ(24),
> + .m_min = 167,
> + .m_max = 1000,
> + .fout_min = MHZ(2000),
> + .fout_max = MHZ(4000),
> +};
> +
> static const struct of_device_id rcar_mipi_dsi_of_table[] = {
> - { .compatible = "renesas,r8a779a0-dsi-csi2-tx" },
> + { .compatible = "renesas,r8a779a0-dsi-csi2-tx", .data = &v3u_data },
> + { .compatible = "renesas,r8a779g0-dsi-csi2-tx", .data = &v4h_data },
> { }
> };
>
> diff --git a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h
> index 2eaca54636f3..f8114d11f2d1 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h
> +++ b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi_regs.h
> @@ -122,7 +122,8 @@
> #define VCLKSET_CKEN (1 << 16)
> #define VCLKSET_COLOR_RGB (0 << 8)
> #define VCLKSET_COLOR_YCC (1 << 8)
> -#define VCLKSET_DIV(x) (((x) & 0x3) << 4)
> +#define VCLKSET_DIV_V3U(x) (((x) & 0x3) << 4)
> +#define VCLKSET_DIV_V4H(x) (((x) & 0x7) << 4)
> #define VCLKSET_BPP_16 (0 << 2)
> #define VCLKSET_BPP_18 (1 << 2)
> #define VCLKSET_BPP_18L (2 << 2)
> @@ -166,6 +167,9 @@
> #define PHTW_CWEN (1 << 8)
> #define PHTW_TESTDIN_CODE(x) (((x) & 0xff) << 0)
>
> +#define PHTR 0x1038
> +#define PHTR_TEST (1 << 16)
> +
> #define PHTC 0x103c
> #define PHTC_TESTCLR (1 << 0)
>
--
Regards,
Laurent Pinchart
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