mirror of https://gitee.com/openkylin/linux.git
drm/mediatek: reduce the hbp and hfp for phy timing
There are some extra data transfer in dsi.
ex. LPX, hs_prepare, hs_zero, hs_exit and the sof/eof of dsi packet.
This signal will enlarge the line time. So the real frame on dsi bus
will be lower than calc by video timing.
So dsi driver reduces the hbp and hfp to keep the line time.
Fixes: 7a5bc4e22e
("drm/mediatek: change the dsi phytiming calculate method")
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Tested-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
This commit is contained in:
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@ -230,28 +230,25 @@ static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data)
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static void mtk_dsi_phy_timconfig(struct mtk_dsi *dsi)
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{
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u32 timcon0, timcon1, timcon2, timcon3;
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u32 ui, cycle_time;
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u32 data_rate_mhz = DIV_ROUND_UP(dsi->data_rate, 1000000);
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struct mtk_phy_timing *timing = &dsi->phy_timing;
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ui = DIV_ROUND_UP(1000000000, dsi->data_rate);
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cycle_time = div_u64(8000000000ULL, dsi->data_rate);
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timing->lpx = (60 * data_rate_mhz / (8 * 1000)) + 1;
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timing->da_hs_prepare = (80 * data_rate_mhz + 4 * 1000) / 8000;
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timing->da_hs_zero = (170 * data_rate_mhz + 10 * 1000) / 8000 + 1 -
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timing->da_hs_prepare;
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timing->da_hs_trail = timing->da_hs_prepare + 1;
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timing->lpx = NS_TO_CYCLE(60, cycle_time);
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timing->da_hs_prepare = NS_TO_CYCLE(50 + 5 * ui, cycle_time);
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timing->da_hs_zero = NS_TO_CYCLE(110 + 6 * ui, cycle_time);
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timing->da_hs_trail = NS_TO_CYCLE(77 + 4 * ui, cycle_time);
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timing->ta_go = 4 * timing->lpx - 2;
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timing->ta_sure = timing->lpx + 2;
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timing->ta_get = 4 * timing->lpx;
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timing->da_hs_exit = 2 * timing->lpx + 1;
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timing->ta_go = 4 * timing->lpx;
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timing->ta_sure = 3 * timing->lpx / 2;
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timing->ta_get = 5 * timing->lpx;
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timing->da_hs_exit = 2 * timing->lpx;
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timing->clk_hs_zero = NS_TO_CYCLE(336, cycle_time);
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timing->clk_hs_trail = NS_TO_CYCLE(100, cycle_time) + 10;
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timing->clk_hs_prepare = NS_TO_CYCLE(64, cycle_time);
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timing->clk_hs_post = NS_TO_CYCLE(80 + 52 * ui, cycle_time);
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timing->clk_hs_exit = 2 * timing->lpx;
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timing->clk_hs_prepare = 70 * data_rate_mhz / (8 * 1000);
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timing->clk_hs_post = timing->clk_hs_prepare + 8;
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timing->clk_hs_trail = timing->clk_hs_prepare;
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timing->clk_hs_zero = timing->clk_hs_trail * 4;
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timing->clk_hs_exit = 2 * timing->clk_hs_trail;
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timcon0 = timing->lpx | timing->da_hs_prepare << 8 |
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timing->da_hs_zero << 16 | timing->da_hs_trail << 24;
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@ -482,27 +479,39 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
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dsi_tmp_buf_bpp - 10);
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data_phy_cycles = timing->lpx + timing->da_hs_prepare +
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timing->da_hs_zero + timing->da_hs_exit + 2;
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timing->da_hs_zero + timing->da_hs_exit + 3;
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if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) {
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if (vm->hfront_porch * dsi_tmp_buf_bpp >
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if ((vm->hfront_porch + vm->hback_porch) * dsi_tmp_buf_bpp >
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data_phy_cycles * dsi->lanes + 18) {
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horizontal_frontporch_byte = vm->hfront_porch *
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dsi_tmp_buf_bpp -
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data_phy_cycles *
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dsi->lanes - 18;
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horizontal_frontporch_byte =
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vm->hfront_porch * dsi_tmp_buf_bpp -
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(data_phy_cycles * dsi->lanes + 18) *
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vm->hfront_porch /
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(vm->hfront_porch + vm->hback_porch);
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horizontal_backporch_byte =
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horizontal_backporch_byte -
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(data_phy_cycles * dsi->lanes + 18) *
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vm->hback_porch /
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(vm->hfront_porch + vm->hback_porch);
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} else {
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DRM_WARN("HFP less than d-phy, FPS will under 60Hz\n");
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horizontal_frontporch_byte = vm->hfront_porch *
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dsi_tmp_buf_bpp;
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}
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} else {
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if (vm->hfront_porch * dsi_tmp_buf_bpp >
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if ((vm->hfront_porch + vm->hback_porch) * dsi_tmp_buf_bpp >
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data_phy_cycles * dsi->lanes + 12) {
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horizontal_frontporch_byte = vm->hfront_porch *
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dsi_tmp_buf_bpp -
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data_phy_cycles *
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dsi->lanes - 12;
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horizontal_frontporch_byte =
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vm->hfront_porch * dsi_tmp_buf_bpp -
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(data_phy_cycles * dsi->lanes + 12) *
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vm->hfront_porch /
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(vm->hfront_porch + vm->hback_porch);
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horizontal_backporch_byte = horizontal_backporch_byte -
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(data_phy_cycles * dsi->lanes + 12) *
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vm->hback_porch /
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(vm->hfront_porch + vm->hback_porch);
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} else {
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DRM_WARN("HFP less than d-phy, FPS will under 60Hz\n");
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horizontal_frontporch_byte = vm->hfront_porch *
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