diff mbox series

[v8,10/10] drm: bridge: dw-mipi-dsi: fix bad register field offsets

Message ID 20200427081952.3536741-11-adrian.ratiu@collabora.com (mailing list archive)
State New, archived
Headers show
Series Genericize DW MIPI DSI bridge and add i.MX 6 driver | expand

Commit Message

Adrian Ratiu April 27, 2020, 8:19 a.m. UTC 
According to the DSI Host Registers sections available in the IMX,
STM and RK ref manuals for 1.01, 1.30 and 1.31, the register fields
are smaller or bigger than what's coded in the driver, leading to
r/w in reserved spaces which might cause undefined behaviours.

Tested-by: Adrian Pop <pop.adrian61@gmail.com>
Tested-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
---
New in v6.
---
 drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 46 +++++++++----------
 1 file changed, 23 insertions(+), 23 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
index 0903ec37289dd..bf22b04761fdf 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c
@@ -316,7 +316,7 @@  struct dw_mipi_dsi_variant {
 static const struct dw_mipi_dsi_variant dw_mipi_dsi_v130_v131_layout = {
 	.cfg_dpi_color_coding =		REG_FIELD(DSI_DPI_COLOR_CODING, 0, 3),
 	.cfg_dpi_18loosely_en =		REG_FIELD(DSI_DPI_COLOR_CODING, 8, 8),
-	.cfg_dpi_vid =			REG_FIELD(DSI_DPI_VCID, 0, 2),
+	.cfg_dpi_vid =			REG_FIELD(DSI_DPI_VCID, 0, 1),
 	.cfg_dpi_vsync_active_low =	REG_FIELD(DSI_DPI_CFG_POL, 1, 1),
 	.cfg_dpi_hsync_active_low =	REG_FIELD(DSI_DPI_CFG_POL, 2, 2),
 	.cfg_cmd_mode_ack_rqst_en =	REG_FIELD(DSI_CMD_MODE_CFG, 1, 1),
@@ -325,29 +325,29 @@  static const struct dw_mipi_dsi_variant dw_mipi_dsi_v130_v131_layout = {
 	.cfg_cmd_mode_dcs_sw_sr_en =	REG_FIELD(DSI_CMD_MODE_CFG, 16, 18),
 	.cfg_cmd_mode_dcs_lw_en =	REG_FIELD(DSI_CMD_MODE_CFG, 19, 19),
 	.cfg_cmd_mode_max_rd_pkt_size =	REG_FIELD(DSI_CMD_MODE_CFG, 24, 24),
-	.cfg_cmd_mode_en =		REG_FIELD(DSI_MODE_CFG, 0, 31),
-	.cfg_cmd_pkt_status =		REG_FIELD(DSI_CMD_PKT_STATUS, 0, 31),
-	.cfg_vid_mode_en =		REG_FIELD(DSI_MODE_CFG, 0, 31),
+	.cfg_cmd_mode_en =		REG_FIELD(DSI_MODE_CFG, 0, 0),
+	.cfg_cmd_pkt_status =		REG_FIELD(DSI_CMD_PKT_STATUS, 0, 6),
+	.cfg_vid_mode_en =		REG_FIELD(DSI_MODE_CFG, 0, 0),
 	.cfg_vid_mode_type =		REG_FIELD(DSI_VID_MODE_CFG, 0, 1),
 	.cfg_vid_mode_low_power =	REG_FIELD(DSI_VID_MODE_CFG, 8, 13),
 	.cfg_vid_mode_vpg_en =		REG_FIELD(DSI_VID_MODE_CFG, 16, 16),
 	.cfg_vid_mode_vpg_horiz =	REG_FIELD(DSI_VID_MODE_CFG, 24, 24),
-	.cfg_vid_pkt_size =		REG_FIELD(DSI_VID_PKT_SIZE, 0, 10),
-	.cfg_vid_hsa_time =		REG_FIELD(DSI_VID_HSA_TIME, 0, 31),
-	.cfg_vid_hbp_time =		REG_FIELD(DSI_VID_HBP_TIME, 0, 31),
-	.cfg_vid_hline_time =		REG_FIELD(DSI_VID_HLINE_TIME, 0, 31),
-	.cfg_vid_vsa_time =		REG_FIELD(DSI_VID_VSA_LINES, 0, 31),
-	.cfg_vid_vbp_time =		REG_FIELD(DSI_VID_VBP_LINES, 0, 31),
-	.cfg_vid_vfp_time =		REG_FIELD(DSI_VID_VFP_LINES, 0, 31),
-	.cfg_vid_vactive_time =		REG_FIELD(DSI_VID_VACTIVE_LINES, 0, 31),
+	.cfg_vid_pkt_size =		REG_FIELD(DSI_VID_PKT_SIZE, 0, 13),
+	.cfg_vid_hsa_time =		REG_FIELD(DSI_VID_HSA_TIME, 0, 11),
+	.cfg_vid_hbp_time =		REG_FIELD(DSI_VID_HBP_TIME, 0, 11),
+	.cfg_vid_hline_time =		REG_FIELD(DSI_VID_HLINE_TIME, 0, 14),
+	.cfg_vid_vsa_time =		REG_FIELD(DSI_VID_VSA_LINES, 0, 9),
+	.cfg_vid_vbp_time =		REG_FIELD(DSI_VID_VBP_LINES, 0, 9),
+	.cfg_vid_vfp_time =		REG_FIELD(DSI_VID_VFP_LINES, 0, 9),
+	.cfg_vid_vactive_time =		REG_FIELD(DSI_VID_VACTIVE_LINES, 0, 13),
 	.cfg_phy_txrequestclkhs =	REG_FIELD(DSI_LPCLK_CTRL, 0, 0),
-	.cfg_phy_bta_time =		REG_FIELD(DSI_BTA_TO_CNT, 0, 31),
-	.cfg_phy_max_rd_time =		REG_FIELD(DSI_PHY_TMR_CFG, 0, 15),
+	.cfg_phy_bta_time =		REG_FIELD(DSI_BTA_TO_CNT, 0, 15),
+	.cfg_phy_max_rd_time =		REG_FIELD(DSI_PHY_TMR_CFG, 0, 14),
 	.cfg_phy_lp2hs_time =		REG_FIELD(DSI_PHY_TMR_CFG, 16, 23),
 	.cfg_phy_hs2lp_time =		REG_FIELD(DSI_PHY_TMR_CFG, 24, 31),
-	.cfg_phy_max_rd_time_v131 =	REG_FIELD(DSI_PHY_TMR_RD_CFG, 0, 15),
-	.cfg_phy_lp2hs_time_v131 =	REG_FIELD(DSI_PHY_TMR_CFG, 0, 15),
-	.cfg_phy_hs2lp_time_v131 =	REG_FIELD(DSI_PHY_TMR_CFG, 16, 31),
+	.cfg_phy_max_rd_time_v131 =	REG_FIELD(DSI_PHY_TMR_RD_CFG, 0, 14),
+	.cfg_phy_lp2hs_time_v131 =	REG_FIELD(DSI_PHY_TMR_CFG, 0, 9),
+	.cfg_phy_hs2lp_time_v131 =	REG_FIELD(DSI_PHY_TMR_CFG, 16, 25),
 	.cfg_phy_clklp2hs_time =	REG_FIELD(DSI_PHY_TMR_LPCLK_CFG, 0, 15),
 	.cfg_phy_clkhs2lp_time =	REG_FIELD(DSI_PHY_TMR_LPCLK_CFG, 16, 31),
 	.cfg_phy_testclr =		REG_FIELD(DSI_PHY_TST_CTRL0, 0, 0),
@@ -361,11 +361,11 @@  static const struct dw_mipi_dsi_variant dw_mipi_dsi_v130_v131_layout = {
 	.cfg_pckhdl_cfg =		REG_FIELD(DSI_PCKHDL_CFG, 0, 4),
 	.cfg_hstx_timeout_counter =	REG_FIELD(DSI_TO_CNT_CFG, 16, 31),
 	.cfg_lprx_timeout_counter =	REG_FIELD(DSI_TO_CNT_CFG, 0, 15),
-	.cfg_int_stat0 =		REG_FIELD(DSI_INT_ST0, 0, 31),
-	.cfg_int_stat1 =		REG_FIELD(DSI_INT_ST1, 0, 31),
-	.cfg_int_mask0 =		REG_FIELD(DSI_INT_MSK0, 0, 31),
-	.cfg_int_mask1 =		REG_FIELD(DSI_INT_MSK1, 0, 31),
-	.cfg_gen_hdr =			REG_FIELD(DSI_GEN_HDR, 0, 31),
+	.cfg_int_stat0 =		REG_FIELD(DSI_INT_ST0, 0, 20),
+	.cfg_int_stat1 =		REG_FIELD(DSI_INT_ST1, 0, 12),
+	.cfg_int_mask0 =		REG_FIELD(DSI_INT_MSK0, 0, 20),
+	.cfg_int_mask1 =		REG_FIELD(DSI_INT_MSK1, 0, 12),
+	.cfg_gen_hdr =			REG_FIELD(DSI_GEN_HDR, 0, 23),
 	.cfg_gen_payload =		REG_FIELD(DSI_GEN_PLD_DATA, 0, 31),
 };
 
@@ -382,7 +382,7 @@  static const struct dw_mipi_dsi_variant dw_mipi_dsi_v101_layout = {
 	.cfg_cmd_mode_gen_lw_en =	REG_FIELD(DSI_CMD_MODE_CFG, 11, 11),
 	.cfg_cmd_mode_dcs_lw_en =	REG_FIELD(DSI_CMD_MODE_CFG, 12, 12),
 	.cfg_cmd_mode_ack_rqst_en =	REG_FIELD(DSI_CMD_MODE_CFG_V101, 13, 13),
-	.cfg_cmd_pkt_status =		REG_FIELD(DSI_CMD_PKT_STATUS_V101, 0, 14),
+	.cfg_cmd_pkt_status =		REG_FIELD(DSI_CMD_PKT_STATUS_V101, 0, 6),
 	.cfg_vid_mode_en =		REG_FIELD(DSI_VID_MODE_CFG_V101, 0, 0),
 	.cfg_vid_mode_type =		REG_FIELD(DSI_VID_MODE_CFG_V101, 1, 2),
 	.cfg_vid_mode_low_power =	REG_FIELD(DSI_VID_MODE_CFG_V101, 3, 8),