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Subject[PATCH v5 04/15] drm/bridge: tc358767: Simplify tc_set_video_mode()
Date
Simplify tc_set_video_mode() by replacing explicit shifting using
macros from <linux/bitfield.h>. No functional change intended.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
---
drivers/gpu/drm/bridge/tc358767.c | 106 ++++++++++++++++++++++--------
1 file changed, 78 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 31f5045e7e42..5b78021d6c5b 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -24,6 +24,7 @@
* GNU General Public License for more details.
*/

+#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
@@ -56,6 +57,7 @@

/* Video Path */
#define VPCTRL0 0x0450
+#define VSDELAY GENMASK(31, 20)
#define OPXLFMT_RGB666 (0 << 8)
#define OPXLFMT_RGB888 (1 << 8)
#define FRMSYNC_DISABLED (0 << 4) /* Video Timing Gen Disabled */
@@ -63,9 +65,17 @@
#define MSF_DISABLED (0 << 0) /* Magic Square FRC disabled */
#define MSF_ENABLED (1 << 0) /* Magic Square FRC enabled */
#define HTIM01 0x0454
+#define HPW GENMASK(8, 0)
+#define HBPR GENMASK(24, 16)
#define HTIM02 0x0458
+#define HDISPR GENMASK(10, 0)
+#define HFPR GENMASK(24, 16)
#define VTIM01 0x045c
+#define VSPR GENMASK(7, 0)
+#define VBPR GENMASK(23, 16)
#define VTIM02 0x0460
+#define VFPR GENMASK(23, 16)
+#define VDISPR GENMASK(10, 0)
#define VFUEN0 0x0464
#define VFUEN BIT(0) /* Video Frame Timing Upload */

@@ -108,14 +118,28 @@
/* Main Channel */
#define DP0_SECSAMPLE 0x0640
#define DP0_VIDSYNCDELAY 0x0644
+#define VID_SYNC_DLY GENMASK(15, 0)
+#define THRESH_DLY GENMASK(31, 16)
+
#define DP0_TOTALVAL 0x0648
+#define H_TOTAL GENMASK(15, 0)
+#define V_TOTAL GENMASK(31, 16)
#define DP0_STARTVAL 0x064c
+#define H_START GENMASK(15, 0)
+#define V_START GENMASK(31, 16)
#define DP0_ACTIVEVAL 0x0650
+#define H_ACT GENMASK(15, 0)
+#define V_ACT GENMASK(31, 16)
+
#define DP0_SYNCVAL 0x0654
+#define VS_WIDTH GENMASK(30, 16)
+#define HS_WIDTH GENMASK(14, 0)
#define SYNCVAL_HS_POL_ACTIVE_LOW (1 << 15)
#define SYNCVAL_VS_POL_ACTIVE_LOW (1 << 31)
#define DP0_MISC 0x0658
#define TU_SIZE_RECOMMENDED (63) /* LSCLK cycles per TU */
+#define MAX_TU_SYMBOL GENMASK(28, 23)
+#define TU_SIZE GENMASK(21, 16)
#define BPC_6 (0 << 5)
#define BPC_8 (1 << 5)

@@ -192,6 +216,12 @@

/* Test & Debug */
#define TSTCTL 0x0a00
+#define COLOR_R GENMASK(31, 24)
+#define COLOR_G GENMASK(23, 16)
+#define COLOR_B GENMASK(15, 8)
+#define ENI2CFILTER BIT(4)
+#define COLOR_BAR_MODE GENMASK(1, 0)
+#define COLOR_BAR_MODE_BARS 2
#define PLL_DBG 0x0a04

static bool tc_test_pattern;
@@ -672,6 +702,7 @@ static int tc_set_video_mode(struct tc_data *tc,
int upper_margin = mode->vtotal - mode->vsync_end;
int lower_margin = mode->vsync_start - mode->vdisplay;
int vsync_len = mode->vsync_end - mode->vsync_start;
+ u32 dp0_syncval;

/*
* Recommended maximum number of symbols transferred in a transfer unit:
@@ -696,50 +727,69 @@ static int tc_set_video_mode(struct tc_data *tc,
* assume we do not need any delay when DPI is a source of
* sync signals
*/
- tc_write(VPCTRL0, (0 << 20) /* VSDELAY */ |
+ tc_write(VPCTRL0,
+ FIELD_PREP(VSDELAY, 0) |
OPXLFMT_RGB888 | FRMSYNC_DISABLED | MSF_DISABLED);
- 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 */
- (mode->vdisplay << 0)); /* height */
+ tc_write(HTIM01,
+ FIELD_PREP(HBPR, ALIGN(left_margin, 2)) |
+ FIELD_PREP(HPW, ALIGN(hsync_len, 2)));
+ tc_write(HTIM02,
+ FIELD_PREP(HDISPR, ALIGN(mode->hdisplay, 2)) |
+ FIELD_PREP(HFPR, ALIGN(right_margin, 2)));
+ tc_write(VTIM01,
+ FIELD_PREP(VBPR, upper_margin) |
+ FIELD_PREP(VSPR, vsync_len));
+ tc_write(VTIM02,
+ FIELD_PREP(VFPR, lower_margin) |
+ FIELD_PREP(VDISPR, mode->vdisplay));
tc_write(VFUEN0, VFUEN); /* update settings */

/* Test pattern settings */
tc_write(TSTCTL,
- (120 << 24) | /* Red Color component value */
- (20 << 16) | /* Green Color component value */
- (99 << 8) | /* Blue Color component value */
- (1 << 4) | /* Enable I2C Filter */
- (2 << 0) | /* Color bar Mode */
- 0);
+ FIELD_PREP(COLOR_R, 120) |
+ FIELD_PREP(COLOR_G, 20) |
+ FIELD_PREP(COLOR_B, 99) |
+ ENI2CFILTER |
+ FIELD_PREP(COLOR_BAR_MODE, COLOR_BAR_MODE_BARS));

/* DP Main Stream Attributes */
vid_sync_dly = hsync_len + left_margin + mode->hdisplay;
tc_write(DP0_VIDSYNCDELAY,
- (max_tu_symbol << 16) | /* thresh_dly */
- (vid_sync_dly << 0));
+ FIELD_PREP(THRESH_DLY, max_tu_symbol) |
+ FIELD_PREP(VID_SYNC_DLY, vid_sync_dly));

- tc_write(DP0_TOTALVAL, (mode->vtotal << 16) | (mode->htotal));
+ tc_write(DP0_TOTALVAL,
+ FIELD_PREP(H_TOTAL, mode->htotal) |
+ FIELD_PREP(V_TOTAL, mode->vtotal));

tc_write(DP0_STARTVAL,
- ((upper_margin + vsync_len) << 16) |
- ((left_margin + hsync_len) << 0));
+ FIELD_PREP(H_START, left_margin + hsync_len) |
+ FIELD_PREP(V_START, upper_margin + vsync_len));
+
+ tc_write(DP0_ACTIVEVAL,
+ FIELD_PREP(V_ACT, mode->vdisplay) |
+ FIELD_PREP(H_ACT, mode->hdisplay));
+
+ dp0_syncval = FIELD_PREP(VS_WIDTH, vsync_len) |
+ FIELD_PREP(HS_WIDTH, hsync_len);
+
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
+ dp0_syncval |= SYNCVAL_VS_POL_ACTIVE_LOW;

- tc_write(DP0_ACTIVEVAL, (mode->vdisplay << 16) | (mode->hdisplay));
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
+ dp0_syncval |= SYNCVAL_HS_POL_ACTIVE_LOW;

- tc_write(DP0_SYNCVAL, (vsync_len << 16) | (hsync_len << 0) |
- ((mode->flags & DRM_MODE_FLAG_NHSYNC) ? SYNCVAL_HS_POL_ACTIVE_LOW : 0) |
- ((mode->flags & DRM_MODE_FLAG_NVSYNC) ? SYNCVAL_VS_POL_ACTIVE_LOW : 0));
+ tc_write(DP0_SYNCVAL, dp0_syncval);

- tc_write(DPIPXLFMT, VS_POL_ACTIVE_LOW | HS_POL_ACTIVE_LOW |
- DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 | DPI_BPP_RGB888);
+ tc_write(DPIPXLFMT,
+ VS_POL_ACTIVE_LOW | HS_POL_ACTIVE_LOW |
+ DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 |
+ DPI_BPP_RGB888);

- tc_write(DP0_MISC, (max_tu_symbol << 23) | (TU_SIZE_RECOMMENDED << 16) |
- BPC_8);
+ tc_write(DP0_MISC,
+ FIELD_PREP(MAX_TU_SYMBOL, max_tu_symbol) |
+ FIELD_PREP(TU_SIZE, TU_SIZE_RECOMMENDED) |
+ BPC_8);

return 0;
err:
--
2.21.0
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