Re: [PATCH v3 2/6] drm/rockchip/dsi: correct phy parameter setting

From: Sean Paul
Date: Wed Oct 25 2017 - 03:49:49 EST

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On Wed, Oct 25, 2017 at 11:50:59AM +0800, Nickey Yang wrote:
> As MIPI PHY document show, icpctrl<3..0> and lpfctrl<5..0>
> should depend on frequency,so fix it.
>
> Reviewed-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> Reviewed-by: Matthias Kaehlcke <mka@xxxxxxxxxxxx>
> Signed-off-by: Nickey Yang <nickey.yang@xxxxxxxxxxxxxx>
> ---

In future, please list the differences between versions. It makes reviewing much
easier.

Thanks,

Sean

> drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 98 ++++++++++++++++++++++++----------
> 1 file changed, 70 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index 95ce253..09e7bfe 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -217,10 +217,21 @@
> #define VCO_IN_CAP_CON_HIGH (0x2 << 1)
> #define REF_BIAS_CUR_SEL BIT(0)
>
> -#define CP_CURRENT_3MA BIT(3)
> +#define CP_CURRENT_1_5UA 0x1
> +#define CP_CURRENT_4_5UA 0x2
> +#define CP_CURRENT_7_5UA 0x6
> +#define CP_CURRENT_6UA 0x9
> +#define CP_CURRENT_12UA 0xb
> +#define CP_CURRENT_SEL(val) ((val) & 0xf)
> #define CP_PROGRAM_EN BIT(7)
> +
> +#define LPF_RESISTORS_15_5KOHM 0x1
> +#define LPF_RESISTORS_13KOHM 0x2
> +#define LPF_RESISTORS_11_5KOHM 0x4
> +#define LPF_RESISTORS_10_5KOHM 0x8
> +#define LPF_RESISTORS_8KOHM 0x10
> #define LPF_PROGRAM_EN BIT(6)
> -#define LPF_RESISTORS_20_KOHM 0
> +#define LPF_RESISTORS_SEL(val) ((val) & 0x3f)
>
> #define HSFREQRANGE_SEL(val) (((val) & 0x3f) << 1)
>
> @@ -339,32 +350,63 @@ enum dw_mipi_dsi_mode {
> DW_MIPI_DSI_VID_MODE,
> };
>
> -struct dphy_pll_testdin_map {
> +struct dphy_pll_parameter_map {
> unsigned int max_mbps;
> - u8 testdin;
> + u8 hsfreqrange;
> + u8 icpctrl;
> + u8 lpfctrl;
> };
>
> /* The table is based on 27MHz DPHY pll reference clock. */
> -static const struct dphy_pll_testdin_map dptdin_map[] = {
> - { 90, 0x00}, { 100, 0x10}, { 110, 0x20}, { 130, 0x01},
> - { 140, 0x11}, { 150, 0x21}, { 170, 0x02}, { 180, 0x12},
> - { 200, 0x22}, { 220, 0x03}, { 240, 0x13}, { 250, 0x23},
> - { 270, 0x04}, { 300, 0x14}, { 330, 0x05}, { 360, 0x15},
> - { 400, 0x25}, { 450, 0x06}, { 500, 0x16}, { 550, 0x07},
> - { 600, 0x17}, { 650, 0x08}, { 700, 0x18}, { 750, 0x09},
> - { 800, 0x19}, { 850, 0x29}, { 900, 0x39}, { 950, 0x0a},
> - {1000, 0x1a}, {1050, 0x2a}, {1100, 0x3a}, {1150, 0x0b},
> - {1200, 0x1b}, {1250, 0x2b}, {1300, 0x3b}, {1350, 0x0c},
> - {1400, 0x1c}, {1450, 0x2c}, {1500, 0x3c}
> +static const struct dphy_pll_parameter_map dppa_map[] = {
> + { 89, 0x00, CP_CURRENT_1_5UA, LPF_RESISTORS_13KOHM},
> + { 99, 0x10, CP_CURRENT_1_5UA, LPF_RESISTORS_13KOHM},
> + { 109, 0x20, CP_CURRENT_1_5UA, LPF_RESISTORS_13KOHM},
> + { 129, 0x01, CP_CURRENT_1_5UA, LPF_RESISTORS_15_5KOHM},
> + { 139, 0x11, CP_CURRENT_1_5UA, LPF_RESISTORS_15_5KOHM},
> + { 149, 0x21, CP_CURRENT_1_5UA, LPF_RESISTORS_15_5KOHM},
> + { 169, 0x02, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM},
> + { 179, 0x12, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM},
> + { 199, 0x22, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM},
> + { 219, 0x03, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM},
> + { 239, 0x13, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM},
> + { 249, 0x23, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM},
> + { 269, 0x04, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM},
> + { 299, 0x14, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM},
> + { 329, 0x05, CP_CURRENT_1_5UA, LPF_RESISTORS_15_5KOHM},
> + { 359, 0x15, CP_CURRENT_1_5UA, LPF_RESISTORS_15_5KOHM},
> + { 399, 0x25, CP_CURRENT_1_5UA, LPF_RESISTORS_15_5KOHM},
> + { 449, 0x06, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
> + { 499, 0x16, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
> + { 549, 0x07, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM},
> + { 599, 0x17, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM},
> + { 649, 0x08, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
> + { 699, 0x18, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
> + { 749, 0x09, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
> + { 799, 0x19, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
> + { 849, 0x29, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
> + { 899, 0x39, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM},
> + { 949, 0x0a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM},
> + { 999, 0x1a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM},
> + {1049, 0x2a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM},
> + {1099, 0x3a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM},
> + {1149, 0x0b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
> + {1199, 0x1b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
> + {1249, 0x2b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
> + {1299, 0x3b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
> + {1349, 0x0c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
> + {1399, 0x1c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
> + {1449, 0x2c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM},
> + {1500, 0x3c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM}
> };
>
> -static int max_mbps_to_testdin(unsigned int max_mbps)
> +static int max_mbps_to_parameter(unsigned int max_mbps)
> {
> int i;
>
> - for (i = 0; i < ARRAY_SIZE(dptdin_map); i++)
> - if (dptdin_map[i].max_mbps > max_mbps)
> - return dptdin_map[i].testdin;
> + for (i = 0; i < ARRAY_SIZE(dppa_map); i++)
> + if (dppa_map[i].max_mbps >= max_mbps)
> + return i;
>
> return -EINVAL;
> }
> @@ -446,16 +488,16 @@ static inline unsigned int ns2ui(struct dw_mipi_dsi *dsi, int ns)
>
> static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
> {
> - int ret, testdin, vco, val;
> + int ret, i, vco, val;
>
> vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
>
> - testdin = max_mbps_to_testdin(dsi->lane_mbps);
> - if (testdin < 0) {
> + i = max_mbps_to_parameter(dsi->lane_mbps);
> + if (i < 0) {
> DRM_DEV_ERROR(dsi->dev,
> - "failed to get testdin for %dmbps lane clock\n",
> + "failed to get parameter for %dmbps clock\n",
> dsi->lane_mbps);
> - return testdin;
> + return i;
> }
>
> /* Start by clearing PHY state */
> @@ -476,13 +518,13 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
> REF_BIAS_CUR_SEL);
>
> dw_mipi_dsi_phy_write(dsi, PLL_CP_CONTROL_PLL_LOCK_BYPASS,
> - CP_CURRENT_3MA);
> + CP_CURRENT_SEL(dppa_map[i].icpctrl));
> dw_mipi_dsi_phy_write(dsi, PLL_LPF_AND_CP_CONTROL,
> CP_PROGRAM_EN | LPF_PROGRAM_EN |
> - LPF_RESISTORS_20_KOHM);
> + LPF_RESISTORS_SEL(dppa_map[i].lpfctrl));
>
> dw_mipi_dsi_phy_write(dsi, HS_RX_CONTROL_OF_LANE_0,
> - HSFREQRANGE_SEL(testdin));
> + HSFREQRANGE_SEL(dppa_map[i].hsfreqrange));
>
> dw_mipi_dsi_phy_write(dsi, PLL_INPUT_DIVIDER_RATIO,
> INPUT_DIVIDER(dsi->input_div));
> @@ -565,7 +607,7 @@ static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
> unsigned int i, pre;
> unsigned long mpclk, pllref, tmp;
> unsigned int m = 1, n = 1, target_mbps = 1000;
> - unsigned int max_mbps = dptdin_map[ARRAY_SIZE(dptdin_map) - 1].max_mbps;
> + unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
> int bpp;
>
> bpp = mipi_dsi_pixel_format_to_bpp(dsi->format);
> --
> 1.9.1
>

--
Sean Paul, Software Engineer, Google / Chromium OS

Next message: Juerg Haefliger: "Re: [PATCH] jfs: Add missing NULL pointer check in __get_metapage"
Previous message: Sean Paul: "Re: [PATCH v3 1/6] drm/rockchip/dsi: Define and use macros for PHY register addresses"
In reply to: Nickey Yang: "[PATCH v3 2/6] drm/rockchip/dsi: correct phy parameter setting"
Next in thread: Nickey Yang: "[PATCH v3 3/6] drm/rockchip/dsi: correct Feedback divider setting"
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