hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

drm/bridge: tc358767: fix timing calculations 

Fields in HTIM01 and HTIM02 regs should be even.
Recomended thresh_dly value is max_tu_symbol.
Remove set of VPCTRL0.VSDELAY as it is related to DSI input
interface. Currently driver supports only DPI.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1510073785-16108-5-git-send-email-andrey.gusakov@cogentembedded.com
This commit is contained in:
Andrey Gusakov 2017-11-07 19:56:22 +03:00 committed by Andrzej Hajda
parent f3b8adbe19
commit 66d1c3b94d
1 changed files with 20 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
drivers/gpu/drm/bridge/tc358767.c
View File

@ -659,6 +659,14 @@ static int tc_set_video_mode(struct tc_data *tc, struct drm_display_mode *mode)
int lower_margin = mode->vsync_start - mode->vdisplay;
int vsync_len = mode->vsync_end - mode->vsync_start;
/*
* Recommended maximum number of symbols transferred in a transfer unit:
* DIV_ROUND_UP((input active video bandwidth in bytes) * tu_size,
* (output active video bandwidth in bytes))
* Must be less than tu_size.
*/
max_tu_symbol = TU_SIZE_RECOMMENDED - 1;
dev_dbg(tc->dev, "set mode %dx%d\n",
mode->hdisplay, mode->vdisplay);
dev_dbg(tc->dev, "H margin %d,%d sync %d\n",
@ -668,13 +676,18 @@ static int tc_set_video_mode(struct tc_data *tc, struct drm_display_mode *mode)
dev_dbg(tc->dev, "total: %dx%d\n", mode->htotal, mode->vtotal);
/* LCD Ctl Frame Size */
tc_write(VPCTRL0, (0x40 << 20) /* VSDELAY */ |
/*
* LCD Ctl Frame Size
* datasheet is not clear of vsdelay in case of DPI
* assume we do not need any delay when DPI is a source of
* sync signals
*/
tc_write(VPCTRL0, (0 << 20) /* VSDELAY */ |
OPXLFMT_RGB888 | FRMSYNC_DISABLED | MSF_DISABLED);
tc_write(HTIM01, (left_margin << 16) | /* H back porch */
(hsync_len << 0)); /* Hsync */
tc_write(HTIM02, (right_margin << 16) | /* H front porch */
(mode->hdisplay << 0)); /* width */
tc_write(HTIM01, (ALIGN(left_margin, 2) << 16) | /* H back porch */
(ALIGN(hsync_len, 2) << 0)); /* Hsync */
tc_write(HTIM02, (ALIGN(right_margin, 2) << 16) | /* H front porch */
(ALIGN(mode->hdisplay, 2) << 0)); /* width */
tc_write(VTIM01, (upper_margin << 16) | /* V back porch */
(vsync_len << 0)); /* Vsync */
tc_write(VTIM02, (lower_margin << 16) | /* V front porch */
@ -693,7 +706,7 @@ static int tc_set_video_mode(struct tc_data *tc, struct drm_display_mode *mode)
/* DP Main Stream Attributes */
vid_sync_dly = hsync_len + left_margin + mode->hdisplay;
tc_write(DP0_VIDSYNCDELAY,
(0x003e << 16) | /* thresh_dly */
(max_tu_symbol << 16) | /* thresh_dly */
(vid_sync_dly << 0));
tc_write(DP0_TOTALVAL, (mode->vtotal << 16) | (mode->htotal));
@ -709,13 +722,6 @@ static int tc_set_video_mode(struct tc_data *tc, struct drm_display_mode *mode)
tc_write(DPIPXLFMT, VS_POL_ACTIVE_LOW | HS_POL_ACTIVE_LOW |
DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 | DPI_BPP_RGB888);
/*
* Recommended maximum number of symbols transferred in a transfer unit:
* DIV_ROUND_UP((input active video bandwidth in bytes) * tu_size,
* (output active video bandwidth in bytes))
* Must be less than tu_size.
*/
max_tu_symbol = TU_SIZE_RECOMMENDED - 1;
tc_write(DP0_MISC, (max_tu_symbol << 23) | (TU_SIZE_RECOMMENDED << 16) |
BPC_8);