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Message-ID: <20240801081144.22372-1-shuijing.li@mediatek.com>
Date: Thu, 1 Aug 2024 16:11:34 +0800
From: Shuijing Li <shuijing.li@...iatek.com>
To: <chunkuang.hu@...nel.org>, <p.zabel@...gutronix.de>, <airlied@...il.com>,
<daniel@...ll.ch>, <matthias.bgg@...il.com>,
<angelogioacchino.delregno@...labora.com>, <jitao.shi@...iatek.com>
CC: <dri-devel@...ts.freedesktop.org>, <linux-mediatek@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
<Project_Global_Chrome_Upstream_Group@...iatek.com>, Shuijing Li
<shuijing.li@...iatek.com>
Subject: [PATCH v4] drm/mediatek: dsi: Add dsi per-frame lp code for mt8188
Adding the per-frame lp function of mt8188, which can keep HFP in HS and
reduce the time required for each line to enter and exit low power.
Per Frame LP:
|<----------One Active Frame-------->|
--______________________________________----___________________
^HSA+HBP^^RGB^^HFP^^HSA+HBP^^RGB^^HFP^ ^HSA+HBP^^RGB^^HFP^
Per Line LP:
|<---------------One Active Frame----------->|
--______________--______________--______________----______________
^HSA+HBP^^RGB^ ^HSA+HBP^^RGB^ ^HSA+HBP^^RGB^ ^HSA+HBP^^RGB^
Signed-off-by: Shuijing Li <shuijing.li@...iatek.com>
---
Changes in v4:
Drop the code related to bllp_en and bllp_wc, adjust ps_wc to dsi->vm.hactive *
dsi_buf_bpp.
Changes in v3:
Use function in bitfield.h and get value from phy timing, per suggestion
from previous thread:
https://patchwork.kernel.org/project/linux-mediatek/patch/20240424091639.22759-1-shuijing.li@mediatek.com/
Changes in v2:
Use bitfield macros and add new function for per prame lp and improve
the format, per suggestion from previous thread:
https://patchwork.kernel.org/project/linux-mediatek/patch/20240314094238.3315-1-shuijing.li@mediatek.com/
---
drivers/gpu/drm/mediatek/mtk_dsi.c | 210 ++++++++++++++++++++++-------
1 file changed, 163 insertions(+), 47 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index b6e3c011a12d..4bda8fa17c3d 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -88,12 +88,16 @@
#define DSI_HSA_WC 0x50
#define DSI_HBP_WC 0x54
#define DSI_HFP_WC 0x58
+#define HFP_HS_EN 31
+#define HFP_HS_VB_PS_WC_SHIFT 16
#define DSI_CMDQ_SIZE 0x60
#define CMDQ_SIZE 0x3f
#define CMDQ_SIZE_SEL BIT(15)
#define DSI_HSTX_CKL_WC 0x64
+#define HSTX_CKL_WC GENMASK(15, 2)
+#define HSTX_CKL_WC_SHIFT 2
#define DSI_RX_DATA0 0x74
#define DSI_RX_DATA1 0x78
@@ -187,6 +191,7 @@ struct mtk_dsi_driver_data {
bool has_shadow_ctl;
bool has_size_ctl;
bool cmdq_long_packet_ctl;
+ bool support_per_frame_lp;
};
struct mtk_dsi {
@@ -426,6 +431,112 @@ static void mtk_dsi_ps_control(struct mtk_dsi *dsi, bool config_vact)
writel(ps_val, dsi->regs + DSI_PSCTRL);
}
+static void mtk_dsi_config_vdo_timing_per_frame_lp(struct mtk_dsi *dsi)
+{
+ u32 horizontal_sync_active_byte;
+ u32 horizontal_backporch_byte;
+ u32 horizontal_frontporch_byte;
+ u32 dsi_tmp_buf_bpp;
+ unsigned int lpx, da_hs_exit, da_hs_prep, da_hs_trail;
+ unsigned int da_hs_zero, ps_wc, hs_vb_ps_wc;
+ u32 v_active_roundup, hstx_cklp_wc;
+ u32 hstx_cklp_wc_max, hstx_cklp_wc_min;
+ struct videomode *vm = &dsi->vm;
+
+ if (dsi->format == MIPI_DSI_FMT_RGB565)
+ dsi_tmp_buf_bpp = 2;
+ else
+ dsi_tmp_buf_bpp = 3;
+
+ da_hs_trail = dsi->phy_timing.da_hs_trail;
+ ps_wc = dsi->vm.hactive * dsi_tmp_buf_bpp;
+
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) {
+ horizontal_sync_active_byte =
+ vm->hsync_len * dsi_tmp_buf_bpp - 10;
+ horizontal_backporch_byte =
+ vm->hback_porch * dsi_tmp_buf_bpp - 10;
+ horizontal_frontporch_byte =
+ vm->hfront_porch * dsi_tmp_buf_bpp - 12;
+
+ v_active_roundup = (32 + horizontal_sync_active_byte +
+ horizontal_backporch_byte + ps_wc +
+ horizontal_frontporch_byte) % dsi->lanes;
+ if (v_active_roundup)
+ horizontal_backporch_byte = horizontal_backporch_byte +
+ dsi->lanes - v_active_roundup;
+ hstx_cklp_wc_min = (DIV_ROUND_UP((12 + 2 + 4 +
+ horizontal_sync_active_byte), dsi->lanes) + da_hs_trail + 1)
+ * dsi->lanes / 6 - 1;
+ hstx_cklp_wc_max = (DIV_ROUND_UP((20 + 6 + 4 +
+ horizontal_sync_active_byte + horizontal_backporch_byte +
+ ps_wc), dsi->lanes) + da_hs_trail + 1) * dsi->lanes / 6 - 1;
+ } else {
+ horizontal_sync_active_byte = vm->hsync_len * dsi_tmp_buf_bpp - 4;
+
+ horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) *
+ dsi_tmp_buf_bpp - 10;
+ hstx_cklp_wc_min = (DIV_ROUND_UP(4, dsi->lanes) + da_hs_trail + 1)
+ * dsi->lanes / 6 - 1;
+
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) {
+ horizontal_frontporch_byte = (vm->hfront_porch *
+ dsi_tmp_buf_bpp - 18);
+
+ v_active_roundup = (28 + horizontal_backporch_byte + ps_wc +
+ horizontal_frontporch_byte) % dsi->lanes;
+ if (v_active_roundup)
+ horizontal_backporch_byte = horizontal_backporch_byte +
+ dsi->lanes - v_active_roundup;
+
+ hstx_cklp_wc_max = (DIV_ROUND_UP((12 + 4 + 4 +
+ horizontal_backporch_byte + ps_wc),
+ dsi->lanes) + da_hs_trail + 1) * dsi->lanes / 6 - 1;
+ } else {
+ horizontal_frontporch_byte = (vm->hfront_porch *
+ dsi_tmp_buf_bpp - 12);
+
+ v_active_roundup = (22 + horizontal_backporch_byte + ps_wc +
+ horizontal_frontporch_byte) % dsi->lanes;
+ if (v_active_roundup)
+ horizontal_backporch_byte = horizontal_backporch_byte +
+ dsi->lanes - v_active_roundup;
+
+ hstx_cklp_wc_max = (DIV_ROUND_UP((12 + 4 + 4 +
+ horizontal_backporch_byte + ps_wc),
+ dsi->lanes) + da_hs_trail + 1) * dsi->lanes / 6 - 1;
+ }
+ }
+ hstx_cklp_wc = FIELD_GET(HSTX_CKL_WC, readl(dsi->regs + DSI_HSTX_CKL_WC));
+
+ if (hstx_cklp_wc <= hstx_cklp_wc_min ||
+ hstx_cklp_wc >= hstx_cklp_wc_max) {
+ hstx_cklp_wc = ((hstx_cklp_wc_min + hstx_cklp_wc_max) / 2) << HSTX_CKL_WC_SHIFT;
+ writel(hstx_cklp_wc, dsi->regs + DSI_HSTX_CKL_WC);
+ }
+ hstx_cklp_wc = hstx_cklp_wc >> HSTX_CKL_WC_SHIFT;
+ if (hstx_cklp_wc <= hstx_cklp_wc_min ||
+ hstx_cklp_wc >= hstx_cklp_wc_max) {
+ DRM_WARN("Wrong setting of hstx_ckl_wc\n");
+ }
+
+ lpx = dsi->phy_timing.lpx;
+ da_hs_exit = dsi->phy_timing.da_hs_exit;
+ da_hs_prep = dsi->phy_timing.da_hs_prepare;
+ da_hs_zero = dsi->phy_timing.da_hs_zero;
+
+ hs_vb_ps_wc = ps_wc -
+ (lpx + da_hs_exit + da_hs_prep + da_hs_zero + 2)
+ * dsi->lanes;
+ horizontal_frontporch_byte = (1 << HFP_HS_EN)
+ | (hs_vb_ps_wc << HFP_HS_VB_PS_WC_SHIFT)
+ | (horizontal_frontporch_byte);
+
+ writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
+ writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
+ writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
+}
+
static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
{
u32 horizontal_sync_active_byte;
@@ -449,57 +560,61 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL);
writel(vm->vactive, dsi->regs + DSI_VACT_NL);
- if (dsi->driver_data->has_size_ctl)
- writel(FIELD_PREP(DSI_HEIGHT, vm->vactive) |
- FIELD_PREP(DSI_WIDTH, vm->hactive),
- dsi->regs + DSI_SIZE_CON);
-
- horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
-
- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
- horizontal_backporch_byte = vm->hback_porch * dsi_tmp_buf_bpp - 10;
- else
- horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) *
- dsi_tmp_buf_bpp - 10;
-
- data_phy_cycles = timing->lpx + timing->da_hs_prepare +
- timing->da_hs_zero + timing->da_hs_exit + 3;
-
- delta = dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST ? 18 : 12;
- delta += dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET ? 0 : 2;
+ if (dsi->driver_data->support_per_frame_lp)
+ mtk_dsi_config_vdo_timing_per_frame_lp(dsi);
+ else {
+ if (dsi->driver_data->has_size_ctl)
+ writel(FIELD_PREP(DSI_HEIGHT, vm->vactive) |
+ FIELD_PREP(DSI_WIDTH, vm->hactive),
+ dsi->regs + DSI_SIZE_CON);
- horizontal_frontporch_byte = vm->hfront_porch * dsi_tmp_buf_bpp;
- horizontal_front_back_byte = horizontal_frontporch_byte + horizontal_backporch_byte;
- data_phy_cycles_byte = data_phy_cycles * dsi->lanes + delta;
+ horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
- if (horizontal_front_back_byte > data_phy_cycles_byte) {
- horizontal_frontporch_byte -= data_phy_cycles_byte *
- horizontal_frontporch_byte /
- horizontal_front_back_byte;
-
- horizontal_backporch_byte -= data_phy_cycles_byte *
- horizontal_backporch_byte /
- horizontal_front_back_byte;
- } else {
- DRM_WARN("HFP + HBP less than d-phy, FPS will under 60Hz\n");
- }
-
- if ((dsi->mode_flags & MIPI_DSI_HS_PKT_END_ALIGNED) &&
- (dsi->lanes == 4)) {
- horizontal_sync_active_byte =
- roundup(horizontal_sync_active_byte, dsi->lanes) - 2;
- horizontal_frontporch_byte =
- roundup(horizontal_frontporch_byte, dsi->lanes) - 2;
- horizontal_backporch_byte =
- roundup(horizontal_backporch_byte, dsi->lanes) - 2;
- horizontal_backporch_byte -=
- (vm->hactive * dsi_tmp_buf_bpp + 2) % dsi->lanes;
+ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ horizontal_backporch_byte = vm->hback_porch * dsi_tmp_buf_bpp - 10;
+ else
+ horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) *
+ dsi_tmp_buf_bpp - 10;
+
+ data_phy_cycles = timing->lpx + timing->da_hs_prepare +
+ timing->da_hs_zero + timing->da_hs_exit + 3;
+
+ delta = dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST ? 18 : 12;
+ delta += dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET ? 0 : 2;
+
+ horizontal_frontporch_byte = vm->hfront_porch * dsi_tmp_buf_bpp;
+ horizontal_front_back_byte = horizontal_frontporch_byte + horizontal_backporch_byte;
+ data_phy_cycles_byte = data_phy_cycles * dsi->lanes + delta;
+
+ if (horizontal_front_back_byte > data_phy_cycles_byte) {
+ horizontal_frontporch_byte -= data_phy_cycles_byte *
+ horizontal_frontporch_byte /
+ horizontal_front_back_byte;
+
+ horizontal_backporch_byte -= data_phy_cycles_byte *
+ horizontal_backporch_byte /
+ horizontal_front_back_byte;
+ } else {
+ DRM_WARN("HFP + HBP less than d-phy, FPS will under 60Hz\n");
+ }
+
+ if ((dsi->mode_flags & MIPI_DSI_HS_PKT_END_ALIGNED) &&
+ (dsi->lanes == 4)) {
+ horizontal_sync_active_byte =
+ roundup(horizontal_sync_active_byte, dsi->lanes) - 2;
+ horizontal_frontporch_byte =
+ roundup(horizontal_frontporch_byte, dsi->lanes) - 2;
+ horizontal_backporch_byte =
+ roundup(horizontal_backporch_byte, dsi->lanes) - 2;
+ horizontal_backporch_byte -=
+ (vm->hactive * dsi_tmp_buf_bpp + 2) % dsi->lanes;
+ }
+
+ writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
+ writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
+ writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
}
- writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC);
- writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC);
- writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC);
-
mtk_dsi_ps_control(dsi, false);
}
@@ -1197,6 +1312,7 @@ static const struct mtk_dsi_driver_data mt8188_dsi_driver_data = {
.has_shadow_ctl = true,
.has_size_ctl = true,
.cmdq_long_packet_ctl = true,
+ .support_per_frame_lp = true,
};
static const struct of_device_id mtk_dsi_of_match[] = {
--
2.43.0
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