| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20250612-exynos7870-dsim-v1-4-1a330bca89df@disroot.org>
Date: Thu, 12 Jun 2025 20:48:08 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Inki Dae <inki.dae@...sung.com>,
Jagan Teki <jagan@...rulasolutions.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Seung-Woo Kim <sw0312.kim@...sung.com>,
Kyungmin Park <kyungmin.park@...sung.com>,
Krzysztof Kozlowski <krzk@...nel.org>,
Alim Akhtar <alim.akhtar@...sung.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-samsung-soc@...r.kernel.org,
Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH 04/12] drm/bridge: samsung-dsim: allow configuring bits and
offsets of CLKCTRL register
DSIM_CLKCTRL bit and offset values hardcoded in the driver:
name | bit/offset value
--------------------------+-----------------
DSIM_LANE_ESC_CLK_EN_CLK | 19
DSIM_LANE_ESC_CLK_EN_DATA | 20
DSIM_BYTE_CLKEN | 24
DSIM_ESC_CLKEN | 28
DSIM_TX_REQUEST_HSCLK | 31
DSIM_CLKCTRL bit and offset values in Exynos7870 DSIM as per downstream
kernel sources:
name | bit/offset value
--------------------------+-----------------
DSIM_LANE_ESC_CLK_EN_CLK | 8
DSIM_LANE_ESC_CLK_EN_DATA | 9
DSIM_BYTE_CLKEN | 17
DSIM_ESC_CLKEN | 16
DSIM_TX_REQUEST_HSCLK | 20
In order to support both, move all values to the driver data struct and
define it for every driver compatible. Reference the values from there
instead, in functions wherever required.
Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
drivers/gpu/drm/bridge/samsung-dsim.c | 76 +++++++++++++++++++++++++----------
include/drm/bridge/samsung-dsim.h | 5 +++
2 files changed, 59 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c b/drivers/gpu/drm/bridge/samsung-dsim.c
index 356c949aaa030a2ecc39beb43ae8608c1e6af828..dbd30b2a10c3c0abf49117db7ebc9a47ff0ea08a 100644
--- a/drivers/gpu/drm/bridge/samsung-dsim.c
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -44,17 +44,13 @@
#define DSIM_BTA_TIMEOUT(x) ((x) << 16)
/* DSIM_CLKCTRL */
-#define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0)
-#define DSIM_ESC_PRESCALER_MASK (0xffff << 0)
-#define DSIM_LANE_ESC_CLK_EN_CLK BIT(19)
-#define DSIM_LANE_ESC_CLK_EN_DATA(x) (((x) & 0xf) << 20)
-#define DSIM_LANE_ESC_CLK_EN_DATA_MASK (0xf << 20)
-#define DSIM_BYTE_CLKEN BIT(24)
-#define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25)
-#define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25)
-#define DSIM_PLL_BYPASS BIT(27)
-#define DSIM_ESC_CLKEN BIT(28)
-#define DSIM_TX_REQUEST_HSCLK BIT(31)
+#define DSIM_ESC_PRESCALER(x) (((x) & 0xffff) << 0)
+#define DSIM_ESC_PRESCALER_MASK (0xffff << 0)
+#define DSIM_LANE_ESC_CLK_EN_DATA(x, offset) (((x) & 0xf) << offset)
+#define DSIM_LANE_ESC_CLK_EN_DATA_MASK(offset) (0xf << offset)
+#define DSIM_BYTE_CLK_SRC(x) (((x) & 0x3) << 25)
+#define DSIM_BYTE_CLK_SRC_MASK (0x3 << 25)
+#define DSIM_PLL_BYPASS BIT(27)
/* DSIM_CONFIG */
#define DSIM_LANE_EN_CLK BIT(0)
@@ -419,6 +415,11 @@ static const struct samsung_dsim_driver_data exynos3_dsi_driver_data = {
.wait_for_hdr_fifo = 1,
.wait_for_reset = 1,
.num_bits_resol = 11,
+ .esc_clken_bit = 28,
+ .byte_clken_bit = 24,
+ .tx_req_hsclk_bit = 31,
+ .lane_esc_clk_bit = 19,
+ .lane_esc_data_offset = 20,
.pll_p_offset = 13,
.reg_values = reg_values,
.pll_fin_min = 6,
@@ -439,6 +440,11 @@ static const struct samsung_dsim_driver_data exynos4_dsi_driver_data = {
.wait_for_hdr_fifo = 1,
.wait_for_reset = 1,
.num_bits_resol = 11,
+ .esc_clken_bit = 28,
+ .byte_clken_bit = 24,
+ .tx_req_hsclk_bit = 31,
+ .lane_esc_clk_bit = 19,
+ .lane_esc_data_offset = 20,
.pll_p_offset = 13,
.reg_values = reg_values,
.pll_fin_min = 6,
@@ -457,6 +463,11 @@ static const struct samsung_dsim_driver_data exynos5_dsi_driver_data = {
.wait_for_hdr_fifo = 1,
.wait_for_reset = 1,
.num_bits_resol = 11,
+ .esc_clken_bit = 28,
+ .byte_clken_bit = 24,
+ .tx_req_hsclk_bit = 31,
+ .lane_esc_clk_bit = 19,
+ .lane_esc_data_offset = 20,
.pll_p_offset = 13,
.reg_values = reg_values,
.pll_fin_min = 6,
@@ -475,6 +486,11 @@ static const struct samsung_dsim_driver_data exynos5433_dsi_driver_data = {
.wait_for_hdr_fifo = 1,
.wait_for_reset = 0,
.num_bits_resol = 12,
+ .esc_clken_bit = 28,
+ .byte_clken_bit = 24,
+ .tx_req_hsclk_bit = 31,
+ .lane_esc_clk_bit = 19,
+ .lane_esc_data_offset = 20,
.pll_p_offset = 13,
.reg_values = exynos5433_reg_values,
.pll_fin_min = 6,
@@ -493,6 +509,11 @@ static const struct samsung_dsim_driver_data exynos5422_dsi_driver_data = {
.wait_for_hdr_fifo = 1,
.wait_for_reset = 1,
.num_bits_resol = 12,
+ .esc_clken_bit = 28,
+ .byte_clken_bit = 24,
+ .tx_req_hsclk_bit = 31,
+ .lane_esc_clk_bit = 19,
+ .lane_esc_data_offset = 20,
.pll_p_offset = 13,
.reg_values = exynos5422_reg_values,
.pll_fin_min = 6,
@@ -511,6 +532,11 @@ static const struct samsung_dsim_driver_data imx8mm_dsi_driver_data = {
.wait_for_hdr_fifo = 1,
.wait_for_reset = 0,
.num_bits_resol = 12,
+ .esc_clken_bit = 28,
+ .byte_clken_bit = 24,
+ .tx_req_hsclk_bit = 31,
+ .lane_esc_clk_bit = 19,
+ .lane_esc_data_offset = 20,
/*
* Unlike Exynos, PLL_P(PMS_P) offset 14 is used in i.MX8M Mini/Nano/Plus
* downstream driver - drivers/gpu/drm/bridge/sec-dsim.c
@@ -714,6 +740,7 @@ static unsigned long samsung_dsim_set_pll(struct samsung_dsim *dsi,
static int samsung_dsim_enable_clock(struct samsung_dsim *dsi)
{
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
unsigned long hs_clk, byte_clk, esc_clk, pix_clk;
unsigned long esc_div;
u32 reg;
@@ -747,15 +774,17 @@ static int samsung_dsim_enable_clock(struct samsung_dsim *dsi)
hs_clk, byte_clk, esc_clk);
reg = samsung_dsim_read(dsi, DSIM_CLKCTRL_REG);
- reg &= ~(DSIM_ESC_PRESCALER_MASK | DSIM_LANE_ESC_CLK_EN_CLK
- | DSIM_LANE_ESC_CLK_EN_DATA_MASK | DSIM_PLL_BYPASS
- | DSIM_BYTE_CLK_SRC_MASK);
- reg |= DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN
- | DSIM_ESC_PRESCALER(esc_div)
- | DSIM_LANE_ESC_CLK_EN_CLK
- | DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi->lanes) - 1)
- | DSIM_BYTE_CLK_SRC(0)
- | DSIM_TX_REQUEST_HSCLK;
+ reg &= ~(DSIM_ESC_PRESCALER_MASK | BIT(driver_data->lane_esc_clk_bit)
+ | DSIM_LANE_ESC_CLK_EN_DATA_MASK(driver_data->lane_esc_data_offset)
+ | DSIM_PLL_BYPASS
+ | DSIM_BYTE_CLK_SRC_MASK);
+ reg |= BIT(driver_data->esc_clken_bit) | BIT(driver_data->byte_clken_bit)
+ | DSIM_ESC_PRESCALER(esc_div)
+ | BIT(driver_data->lane_esc_clk_bit)
+ | DSIM_LANE_ESC_CLK_EN_DATA(BIT(dsi->lanes) - 1,
+ driver_data->lane_esc_data_offset)
+ | DSIM_BYTE_CLK_SRC(0)
+ | BIT(driver_data->tx_req_hsclk_bit);
samsung_dsim_write(dsi, DSIM_CLKCTRL_REG, reg);
return 0;
@@ -859,11 +888,14 @@ static void samsung_dsim_set_phy_ctrl(struct samsung_dsim *dsi)
static void samsung_dsim_disable_clock(struct samsung_dsim *dsi)
{
+ const struct samsung_dsim_driver_data *driver_data = dsi->driver_data;
u32 reg;
reg = samsung_dsim_read(dsi, DSIM_CLKCTRL_REG);
- reg &= ~(DSIM_LANE_ESC_CLK_EN_CLK | DSIM_LANE_ESC_CLK_EN_DATA_MASK
- | DSIM_ESC_CLKEN | DSIM_BYTE_CLKEN);
+ reg &= ~(BIT(driver_data->lane_esc_clk_bit)
+ | DSIM_LANE_ESC_CLK_EN_DATA_MASK(driver_data->lane_esc_data_offset)
+ | BIT(driver_data->esc_clken_bit)
+ | BIT(driver_data->byte_clken_bit));
samsung_dsim_write(dsi, DSIM_CLKCTRL_REG, reg);
reg = samsung_dsim_read(dsi, DSIM_PLLCTRL_REG);
diff --git a/include/drm/bridge/samsung-dsim.h b/include/drm/bridge/samsung-dsim.h
index 3641c57557f42fd90cd2e8c0282f69dbe36ba2de..8938eccf78730019e0404101c855dc2d7d225668 100644
--- a/include/drm/bridge/samsung-dsim.h
+++ b/include/drm/bridge/samsung-dsim.h
@@ -63,6 +63,11 @@ struct samsung_dsim_driver_data {
unsigned int wait_for_hdr_fifo;
unsigned int wait_for_reset;
unsigned int num_bits_resol;
+ unsigned int esc_clken_bit;
+ unsigned int byte_clken_bit;
+ unsigned int tx_req_hsclk_bit;
+ unsigned int lane_esc_clk_bit;
+ unsigned int lane_esc_data_offset;
unsigned int pll_p_offset;
const unsigned int *reg_values;
unsigned int pll_fin_min;
--
2.49.0
Powered by blists - more mailing lists