Mipi TX Frame generator timing configuration
Compute and set frame generator timings like hactive, front porch,
back porch etc.
v2: minor code review changes
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus@xxxxxxxxx>
Reviewed-by: Bob Paauwe <bob.j.paauwe@xxxxxxxxx>
---
drivers/gpu/drm/kmb/kmb_dsi.c | 132 ++++++++++++++++++++++++++++++++++++++++-
drivers/gpu/drm/kmb/kmb_regs.h | 37 ++++++++++++
2 files changed, 166 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c
index cb6082d..951a742 100644
--- a/drivers/gpu/drm/kmb/kmb_dsi.c
+++ b/drivers/gpu/drm/kmb/kmb_dsi.c
@@ -391,6 +391,123 @@ static u32 mipi_tx_fg_section_cfg(struct kmb_drm_private *dev_priv,
return 0;
}
+static void mipi_tx_fg_cfg_regs(struct kmb_drm_private *dev_priv,
+ u8 frame_gen,
+ struct mipi_tx_frame_timing_cfg *fg_cfg)
+{
+ u32 sysclk;
+ /*float ppl_llp_ratio; */
+ u32 ppl_llp_ratio;
+ u32 ctrl_no = MIPI_CTRL6, reg_adr, val, offset;
+
+ /*Get system clock for blanking period cnfigurations */
+ /*TODO need to get system clock from clock driver */
+ /* Assume 700 Mhz system clock for now */
+ sysclk = 700;
+
+ /*ppl-pixel packing layer, llp-low level protocol
+ * frame genartor timing parameters are clocked on the system clock
+ * whereas as the equivalent parameters in the LLP blocks are clocked
+ * on LLP Tx clock from the D-PHY - BYTE clock
+ */
+
+ /*multiply by 1000 to keep the precision */
+ ppl_llp_ratio = ((fg_cfg->bpp / 8) * sysclk * 1000) /
+ ((fg_cfg->lane_rate_mbps / 8) * fg_cfg->active_lanes);
+
+ /*frame generator number of lines */
+ reg_adr = MIPI_TXm_HS_FGn_NUM_LINES(ctrl_no, frame_gen);
+ kmb_write(dev_priv, reg_adr, fg_cfg->v_active);
+
+ /*vsync width */
+ /*
+ *there are 2 registers for vsync width -VSA in lines for channels 0-3
+ *REG_VSYNC_WIDTH0: [15:0]-VSA for channel0, [31:16]-VSA for channel1
+ *REG_VSYNC_WIDTH1: [15:0]-VSA for channel2, [31:16]-VSA for channel3
+ */
+ offset = (frame_gen % 2) * 16;
+ reg_adr = MIPI_TXm_HS_VSYNC_WIDTHn(ctrl_no, frame_gen);
+ kmb_write_bits(dev_priv, reg_adr, offset, 16, fg_cfg->vsync_width);
+
+ /*v backporch - same register config like vsync width */
+ reg_adr = MIPI_TXm_HS_V_BACKPORCHESn(ctrl_no, frame_gen);
+ kmb_write_bits(dev_priv, reg_adr, offset, 16, fg_cfg->v_backporch);
+
+ /*v frontporch - same register config like vsync width */
+ reg_adr = MIPI_TXm_HS_V_FRONTPORCHESn(ctrl_no, frame_gen);
+ kmb_write_bits(dev_priv, reg_adr, offset, 16, fg_cfg->v_frontporch);
+
+ /*v active - same register config like vsync width */
+ reg_adr = MIPI_TXm_HS_V_ACTIVEn(ctrl_no, frame_gen);
+ kmb_write_bits(dev_priv, reg_adr, offset, 16, fg_cfg->v_active);
+
+ /*hsyc width */
+ reg_adr = MIPI_TXm_HS_HSYNC_WIDTHn(ctrl_no, frame_gen);
+ kmb_write(dev_priv, reg_adr,
+ (fg_cfg->hsync_width * ppl_llp_ratio) / 1000);
+
+ /*h backporch */
+ reg_adr = MIPI_TXm_HS_H_BACKPORCHn(ctrl_no, frame_gen);
+ kmb_write(dev_priv, reg_adr,
+ (fg_cfg->h_backporch * ppl_llp_ratio) / 1000);
+
+ /*h frontporch */
+ reg_adr = MIPI_TXm_HS_H_FRONTPORCHn(ctrl_no, frame_gen);
+ kmb_write(dev_priv, reg_adr,
+ (fg_cfg->h_frontporch * ppl_llp_ratio) / 1000);
+
+ /*h active */
+ reg_adr = MIPI_TXm_HS_H_ACTIVEn(ctrl_no, frame_gen);
+ /*convert h_active which is wc in bytes to cycles */
+ val = (fg_cfg->h_active * sysclk * 1000) /
+ ((fg_cfg->lane_rate_mbps / 8) * fg_cfg->active_lanes);
+ val /= 1000;
+ kmb_write(dev_priv, reg_adr, val);
+
+ /* llp hsync width */
+ reg_adr = MIPI_TXm_HS_LLP_HSYNC_WIDTHn(ctrl_no, frame_gen);
+ kmb_write(dev_priv, reg_adr, fg_cfg->hsync_width * (fg_cfg->bpp / 8));
+
+ /* llp h backporch */
+ reg_adr = MIPI_TXm_HS_LLP_H_BACKPORCHn(ctrl_no, frame_gen);
+ kmb_write(dev_priv, reg_adr, fg_cfg->h_backporch * (fg_cfg->bpp / 8));
+
+ /* llp h frontporch */
+ reg_adr = MIPI_TXm_HS_LLP_H_FRONTPORCHn(ctrl_no, frame_gen);
+ kmb_write(dev_priv, reg_adr, fg_cfg->h_frontporch * (fg_cfg->bpp / 8));
+}
+
+static void mipi_tx_fg_cfg(struct kmb_drm_private *dev_priv, u8 frame_gen,
+ u8 active_lanes, u32 bpp, u32 wc,
+ u32 lane_rate_mbps, struct mipi_tx_frame_cfg *fg_cfg)
+{
+ u32 i, fg_num_lines = 0;
+ struct mipi_tx_frame_timing_cfg fg_t_cfg;
+
+ /*calculate the total frame generator number of lines based on it's
+ * active sections
+ */
+ for (i = 0; i < MIPI_TX_FRAME_GEN_SECTIONS; i++) {
+ if (fg_cfg->sections[i] != NULL)
+ fg_num_lines += fg_cfg->sections[i]->height_lines;
+ }
+
+ fg_t_cfg.bpp = bpp;
+ fg_t_cfg.lane_rate_mbps = lane_rate_mbps;
+ fg_t_cfg.hsync_width = fg_cfg->hsync_width;
+ fg_t_cfg.h_backporch = fg_cfg->h_backporch;
+ fg_t_cfg.h_frontporch = fg_cfg->h_frontporch;
+ fg_t_cfg.h_active = wc;
+ fg_t_cfg.vsync_width = fg_cfg->vsync_width;
+ fg_t_cfg.v_backporch = fg_cfg->v_backporch;
+ fg_t_cfg.v_frontporch = fg_cfg->v_frontporch;
+ fg_t_cfg.v_active = fg_num_lines;
+ fg_t_cfg.active_lanes = active_lanes;
+
+ /*apply frame generator timing setting */
+ mipi_tx_fg_cfg_regs(dev_priv, frame_gen, &fg_t_cfg);
+}
+
static u32 mipi_tx_init_cntrl(struct kmb_drm_private *dev_priv,
struct mipi_ctrl_cfg *ctrl_cfg)
{
@@ -412,12 +529,13 @@ static u32 mipi_tx_init_cntrl(struct kmb_drm_private *dev_priv,
if (ctrl_cfg->tx_ctrl_cfg.frames[frame_id] == NULL)
continue;
+ /* Frame Section configuration */
/*TODO - assume there is only one valid section in a frame, so
* bits_per_pclk and word_count are only set once
*/
for (sect = 0; sect < MIPI_CTRL_VIRTUAL_CHANNELS; sect++) {
if (ctrl_cfg->tx_ctrl_cfg.frames[frame_id]->sections[sect]
- == NULL)
+ == NULL)
continue;
ret = mipi_tx_fg_section_cfg(dev_priv, frame_id, sect,
@@ -429,9 +547,17 @@ static u32 mipi_tx_init_cntrl(struct kmb_drm_private *dev_priv,
}
+ /* set frame specific parameters */
+ mipi_tx_fg_cfg(dev_priv, frame_id, ctrl_cfg->active_lanes,
+ bits_per_pclk,
+ word_count,
+ ctrl_cfg->lane_rate_mbps,
+ ctrl_cfg->tx_ctrl_cfg.frames[frame_id]);
/*function for setting frame sepecific parameters will be
- * called here bits_per_pclk and word_count will be passed
- * in to this function
+ * called here
+ */
+ /*bits_per_pclk and word_count will be passed in to this
+ * function
*/
}
diff --git a/drivers/gpu/drm/kmb/kmb_regs.h b/drivers/gpu/drm/kmb/kmb_regs.h
index c63199b..bdb55b7 100644
--- a/drivers/gpu/drm/kmb/kmb_regs.h
+++ b/drivers/gpu/drm/kmb/kmb_regs.h
@@ -390,4 +390,41 @@
+ (0x400*M) + (0x2C*N) + (8*O))
#define MIPI_TX_HS_FG0_SECT0_LINE_CFG (0x44)
+#define MIPI_TX_HS_FG0_NUM_LINES (0x68)
+#define MIPI_TXm_HS_FGn_NUM_LINES(M, N) (MIPI_TX_HS_FG0_NUM_LINES + \
+ (0x400*M) + (0x2C*N))
+#define MIPI_TX_HS_VSYNC_WIDTHS0 (0x104)
+#define MIPI_TXm_HS_VSYNC_WIDTHn(M, N) (MIPI_TX_HS_VSYNC_WIDTHS0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_V_BACKPORCHES0 (0x16c)
+#define MIPI_TXm_HS_V_BACKPORCHESn(M, N) (MIPI_TX_HS_V_BACKPORCHES0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_V_FRONTPORCHES0 (0x174)
+#define MIPI_TXm_HS_V_FRONTPORCHESn(M, N) (MIPI_TX_HS_V_FRONTPORCHES0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_V_ACTIVE0 (0x17c)
+#define MIPI_TXm_HS_V_ACTIVEn(M, N) (MIPI_TX_HS_V_ACTIVE0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_HSYNC_WIDTH0 (0x10c)
+#define MIPI_TXm_HS_HSYNC_WIDTHn(M, N) (MIPI_TX_HS_HSYNC_WIDTH0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_H_BACKPORCH0 (0x11c)
+#define MIPI_TXm_HS_H_BACKPORCHn(M, N) (MIPI_TX_HS_H_BACKPORCH0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_H_FRONTPORCH0 (0x12c)
+#define MIPI_TXm_HS_H_FRONTPORCHn(M, N) (MIPI_TX_HS_H_FRONTPORCH0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_H_ACTIVE0 (0x184)
+#define MIPI_TXm_HS_H_ACTIVEn(M, N) (MIPI_TX_HS_H_ACTIVE0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_LLP_HSYNC_WIDTH0 (0x13c)
+#define MIPI_TXm_HS_LLP_HSYNC_WIDTHn(M, N) (MIPI_TX_HS_LLP_HSYNC_WIDTH0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_LLP_H_BACKPORCH0 (0x14c)
+#define MIPI_TXm_HS_LLP_H_BACKPORCHn(M, N) (MIPI_TX_HS_LLP_H_BACKPORCH0 + \
+ (0x400*M) + (0x4*N))
+#define MIPI_TX_HS_LLP_H_FRONTPORCH0 (0x15c)
+#define MIPI_TXm_HS_LLP_H_FRONTPORCHn(M, N) (MIPI_TX_HS_LLP_H_FRONTPORCH0 \
+ + (0x400*M) + (0x4*N))
+
#endif /* __KMB_REGS_H__ */
--
2.7.4
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