lcd: mipi phy timing adjustment

PD#163895: lcd: mipi phy timing adjustment

Change-Id: I87d563d6b9040ef7af0ed7874c99e6414675118e
Signed-off-by: Weiming Liu <weiming.liu@amlogic.com>

diff --git a/drivers/amlogic/media/vout/lcd/lcd_tablet/mipi_dsi_util.c b/drivers/amlogic/media/vout/lcd/lcd_tablet/mipi_dsi_util.c
index d58cf50..4de8a05 100644 (file)
--- a/drivers/amlogic/media/vout/lcd/lcd_tablet/mipi_dsi_util.c
+++ b/drivers/amlogic/media/vout/lcd/lcd_tablet/mipi_dsi_util.c
@@ -1391,7 +1391,7 @@ int dsi_read_single(unsigned char *payload, unsigned char *rd_data,
 
 static void mipi_dsi_phy_config(struct dsi_phy_s *dphy, unsigned int dsi_ui)
 {
-       unsigned int temp, t_ui, t_req;
+       unsigned int temp, t_ui, t_req_min, t_req_max, t_req, n;
 
        t_ui = (1000000 * 100) / (dsi_ui / 1000); /* 0.01ns*100 */
        temp = t_ui * 8; /* lane_byte cycle time */
@@ -1404,13 +1404,6 @@ static void mipi_dsi_phy_config(struct dsi_phy_s *dphy, unsigned int dsi_ui)
        dphy->lp_ta_get = ((DPHY_TIME_LP_TA_GETX(t_ui) + temp - 1) / temp) &
                        0xff;
        dphy->hs_exit = ((DPHY_TIME_HS_EXIT(t_ui) + temp - 1) / temp) & 0xff;
-       dphy->hs_trail = ((DPHY_TIME_HS_TRAIL(t_ui) + temp - 1) / temp) & 0xff;
-       dphy->hs_prepare = ((DPHY_TIME_HS_PREPARE(t_ui) + temp - 1) / temp) &
-                       0xff;
-       dphy->hs_zero = ((DPHY_TIME_HS_ZERO(t_ui) + temp - 1) / temp) & 0xff;
-       dphy->clk_trail = ((DPHY_TIME_CLK_TRAIL(t_ui) + temp - 1) / temp) &
-                       0xff;
-       dphy->clk_post = ((DPHY_TIME_CLK_POST(t_ui) + temp - 1) / temp) & 0xff;
        dphy->clk_prepare = ((DPHY_TIME_CLK_PREPARE(t_ui) + temp - 1) / temp) &
                        0xff;
        dphy->clk_zero = ((DPHY_TIME_CLK_ZERO(t_ui) + temp - 1) / temp) & 0xff;
@@ -1418,6 +1411,83 @@ static void mipi_dsi_phy_config(struct dsi_phy_s *dphy, unsigned int dsi_ui)
        dphy->init = (DPHY_TIME_INIT(t_ui) + temp - 1) / temp;
        dphy->wakeup = (DPHY_TIME_WAKEUP(t_ui) + temp - 1) / temp;
 
+       t_req_max = ((105 * 100 + 12 * t_ui) / 100);
+       for (n = 0; n <= 0xff; n++) {
+               dsi_phy_config.clk_trail = n;
+               if (((temp * dsi_phy_config.clk_trail / 100) > 70) &&
+                       ((temp * dsi_phy_config.clk_trail / 100) < t_req_max)) {
+                       if (lcd_debug_print_flag) {
+                               LCDPR("t_ui=%d, t_req_max=%d\n",
+                                       t_ui, t_req_max);
+                               LCDPR("clk_trail=%d, n=%d\n",
+                                       dsi_phy_config.clk_trail, n);
+                       }
+                       break;
+               }
+       }
+
+       t_req_min = 2 * ((60 * 100 + 52 * t_ui) / 100);
+       for (n = 0; n <= 0xff; n++) {
+               dsi_phy_config.clk_post = n;
+               if ((temp * dsi_phy_config.clk_post / 100) >= t_req_min) {
+                       if (lcd_debug_print_flag) {
+                               LCDPR("t_ui=%d, t_req_min=%d\n",
+                                       t_ui, t_req_min);
+                               LCDPR("clk_post=%d, n=%d\n",
+                                       dsi_phy_config.clk_post, n);
+                       }
+                       break;
+               }
+       }
+
+       t_req_min = max(8 * t_ui / 100, (60 * 100 + 4 * t_ui) / 100) + 10;
+       t_req_max = ((105 * 100 + 12 * t_ui) / 100);
+       for (n = 0; n <= 0xff; n++) {
+               dsi_phy_config.hs_trail = n;
+               if (((temp * dsi_phy_config.hs_trail / 100) > t_req_min) &&
+                       ((temp * dsi_phy_config.hs_trail / 100) < t_req_max)) {
+                       if (lcd_debug_print_flag) {
+                               LCDPR("t_ui=%d, t_req_min=%d, t_req_max=%d\n",
+                                       t_ui, t_req_min, t_req_max);
+                               LCDPR("hs_trail=%d, n=%d\n",
+                                       dsi_phy_config.hs_trail, n);
+                       }
+                       break;
+               }
+       }
+
+       t_req_min = (40 * 100 + 4 * t_ui) / 100;
+       t_req_max = ((85 * 100 + 6 * t_ui) / 100);
+       for (n = 0; n <= 0xff; n++) {
+               dsi_phy_config.hs_prepare = n;
+               if (((temp * dsi_phy_config.hs_prepare / 100) > t_req_min) &&
+                       ((temp * dsi_phy_config.hs_prepare / 100) <
+                       t_req_max)) {
+                       if (lcd_debug_print_flag) {
+                               LCDPR("t_ui=%d, t_req_min=%d, t_req_max=%d\n",
+                                       t_ui, t_req_min, t_req_max);
+                               LCDPR("hs_prepare=%d, n=%d\n",
+                                       dsi_phy_config.hs_prepare, n);
+                       }
+                       break;
+               }
+       }
+
+       t_req_min = ((145 * 100 + 10 * t_ui) / 100) -
+               ((40 * 100 + 4 * t_ui) / 100);
+       for (n = 0; n <= 0xff; n++) {
+               dsi_phy_config.hs_zero = n;
+               if ((temp * dsi_phy_config.hs_zero / 100) > t_req_min) {
+                       if (lcd_debug_print_flag) {
+                               LCDPR("t_ui=%d, t_req_min=%d\n",
+                                       t_ui, t_req_min);
+                               LCDPR("hs_zero=%d, n=%d\n",
+                                       dsi_phy_config.hs_zero, n);
+                       }
+                       break;
+               }
+       }
+
        /* check dphy spec: (unit: ns) */
        if ((temp * dsi_phy_config.lp_tesc / 100) <= 100)
                LCDERR("lp_tesc timing error\n");

diff --git a/drivers/amlogic/media/vout/lcd/lcd_tablet/mipi_dsi_util.h b/drivers/amlogic/media/vout/lcd/lcd_tablet/mipi_dsi_util.h
index d72f4ce..d3e8230 100644 (file)
--- a/drivers/amlogic/media/vout/lcd/lcd_tablet/mipi_dsi_util.h
+++ b/drivers/amlogic/media/vout/lcd/lcd_tablet/mipi_dsi_util.h
@@ -466,19 +466,19 @@ enum tv_enc_lcd_type_e {
 /* 5*lpx */
 #define DPHY_TIME_LP_TA_GETX(ui)    (5 * DPHY_TIME_LP_LPX(ui))
 /* >100ns */
-#define DPHY_TIME_HS_EXIT(ui)       (120 * 100)
+#define DPHY_TIME_HS_EXIT(ui)       (110 * 100)
 /* max(8*ui, 60+4*ui), (teot)<105+12*ui */
 #define DPHY_TIME_HS_TRAIL(ui)      ((ui > (60 * 100 / 4)) ? \
                                        (8 * ui) : ((60 * 100) + 4 * ui))
 /* (40+4*ui, 85+6*ui) */
-#define DPHY_TIME_HS_PREPARE(ui)    (50 * 100 + 4 * t_ui)
+#define DPHY_TIME_HS_PREPARE(ui)    (50 * 100 + 4 * ui)
 /* hs_prepare+hs_zero >145+10*ui */
 #define DPHY_TIME_HS_ZERO(ui)       (160 * 100 + 10 * ui - \
                                        DPHY_TIME_HS_PREPARE(ui))
 /* >60ns, (teot)<105+12*ui */
 #define DPHY_TIME_CLK_TRAIL(ui)     (70 * 100)
 /* >60+52*ui */
-#define DPHY_TIME_CLK_POST(ui)      (70 * 100 + 52 * ui)
+#define DPHY_TIME_CLK_POST(ui)      (2 * (60 * 100 + 52 * ui))
 /* (38, 95) */
 #define DPHY_TIME_CLK_PREPARE(ui)   (50 * 100)
 /* clk_prepare+clk_zero > 300 */