lkml.org 
[lkml]   [2017]   [Sep]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 4/7] drm/rockchip/dsi: correct phy parameter setting
Date
As MIPI PHY document show, icpctrl<3..0> and lpfctrl<5..0>
should depend on frequency,so fix it.

Signed-off-by: Nickey Yang <nickey.yang@rock-chips.com>
---
drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 70 +++++++++++++++++++---------------
1 file changed, 40 insertions(+), 30 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
index 9265b7f..d5250e8 100644
--- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
@@ -228,10 +228,10 @@
#define VCO_IN_CAP_CON_HIGH (0x2 << 1)
#define REF_BIAS_CUR_SEL BIT(0)

-#define CP_CURRENT_3MA BIT(3)
+#define CP_CURRENT_SEL(val) ((val) & 0xf)
#define CP_PROGRAM_EN BIT(7)
#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)

@@ -340,32 +340,44 @@ 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[] = {
+ { 90, 0x00, 0x1 ,0x02}, { 100, 0x10 ,0x1, 0x02},
+ { 110, 0x20, 0x1, 0x02}, { 130, 0x01, 0x1, 0x01},
+ { 140, 0x11, 0x1, 0x01}, { 150, 0x21, 0x1, 0x01},
+ { 170, 0x02, 0x9, 0x02}, { 180, 0x12, 0x9, 0x02},
+ { 200, 0x22, 0x9, 0x02}, { 220, 0x03, 0x2, 0x02},
+ { 240, 0x13, 0x2, 0x02}, { 250, 0x23, 0x2, 0x02},
+ { 270, 0x04, 0x9, 0x04}, { 300, 0x14, 0x9, 0x04},
+ { 330, 0x05, 0x1, 0x01}, { 360, 0x15, 0x1, 0x01},
+ { 400, 0x25, 0x1, 0x01}, { 450, 0x06, 0x6, 0x04},
+ { 500, 0x16, 0x6, 0x04}, { 550, 0x07, 0x6, 0x08},
+ { 600, 0x17, 0x6, 0x08}, { 650, 0x08, 0x6, 0x04},
+ { 700, 0x18, 0x6, 0x04}, { 750, 0x09, 0x6, 0x04},
+ { 800, 0x19, 0x6, 0x04}, { 850, 0x29, 0x6, 0x04},
+ { 900, 0x39, 0x6, 0x04}, { 950, 0x0a, 0xb, 0x10},
+ {1000, 0x1a, 0xb, 0x10}, {1050, 0x2a, 0xb, 0x10},
+ {1100, 0x3a, 0xb, 0x10}, {1150, 0x0b, 0xb, 0x08},
+ {1200, 0x1b, 0xb, 0x08}, {1250, 0x2b, 0xb, 0x08},
+ {1300, 0x3b, 0xb, 0x08}, {1350, 0x0c, 0xb, 0x08},
+ {1400, 0x1c, 0xb, 0x08}, {1450, 0x2c, 0xb, 0x08},
+ {1500, 0x3c, 0xb, 0x08}
};

-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;
}
@@ -447,16 +459,16 @@ 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) {
dev_err(dsi->dev,
- "failed to get testdin for %dmbps lane clock\n",
+ "failed to get parameter for %dmbps lane clock\n",
dsi->lane_mbps);
- return testdin;
+ return i;
}

/* Start by clearing PHY state */
@@ -475,12 +487,10 @@ static int dw_mipi_dsi_phy_init(struct dw_mipi_dsi *dsi)
VCO_IN_CAP_CON_LOW |
REF_BIAS_CUR_SEL);

- dw_mipi_dsi_phy_write(dsi, 0x11, CP_CURRENT_3MA);
+ dw_mipi_dsi_phy_write(dsi, 0x11, CP_CURRENT_SEL(dppa_map[i].icpctrl));
dw_mipi_dsi_phy_write(dsi, 0x12, CP_PROGRAM_EN | LPF_PROGRAM_EN |
- LPF_RESISTORS_20_KOHM);
-
- dw_mipi_dsi_phy_write(dsi, 0x44, HSFREQRANGE_SEL(testdin));
-
+ LPF_RESISTORS_SEL(dppa_map[i].lpfctrl));
+ dw_mipi_dsi_phy_write(dsi, 0x44, HSFREQRANGE_SEL(dppa_map[i].hsfreqrange));
dw_mipi_dsi_phy_write(dsi, 0x17, INPUT_DIVIDER(dsi->input_div));
dw_mipi_dsi_phy_write(dsi, 0x18, LOOP_DIV_LOW_SEL(dsi->feedback_div) |
LOW_PROGRAM_EN);
@@ -547,7 +557,7 @@ static int dw_mipi_dsi_get_lane_bps(struct dw_mipi_dsi *dsi,
{
unsigned long mpclk, tmp;
unsigned int 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;
int lanes = dsi->lanes;
unsigned long best_freq = 0;
--
1.9.1

\
 
 \ /
  Last update: 2017-09-18 11:07    [W:0.091 / U:4.028 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site