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    SubjectRe: [PATCH v3 04/15] drm/bridge: tc358767: Simplify tc_set_video_mode()
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    Date
    On 05.06.2019 09:04, Andrey Smirnov wrote:
    > 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>
    > Cc: Archit Taneja <architt@codeaurora.org>
    > 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


    Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>

     --
    Regards
    Andrzej


    > ---
    > 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 115cffc55a96..c0fc686ce5ec 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:


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