From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>,
Andrzej Hajda <a.hajda@samsung.com>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Tomi Valkeinen <tomi.valkeinen@ti.com>,
Andrey Gusakov <andrey.gusakov@cogentembedded.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Cory Tusar <cory.tusar@zii.aero>, Chris Healy <cphealy@gmail.com>,
Lucas Stach <l.stach@pengutronix.de>,
linux-kernel@vger.kernel.org
Subject: [PATCH v4 14/15] drm/bridge: tc358767: Drop unnecessary 8 byte buffer
Date: Thu, 6 Jun 2019 21:45:49 -0700 [thread overview]
Message-ID: <20190607044550.13361-15-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20190607044550.13361-1-andrew.smirnov@gmail.com>
tc_get_display_props() never reads more than a byte via AUX, so
there's no need to reserve 8 for that purpose. No function change
intended.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.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 | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index e747f10021e3..4a245144aa83 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -661,8 +661,7 @@ static int tc_aux_link_setup(struct tc_data *tc)
static int tc_get_display_props(struct tc_data *tc)
{
int ret;
- /* temp buffer */
- u8 tmp[8];
+ u8 reg;
/* Read DP Rx Link Capability */
ret = drm_dp_link_probe(&tc->aux, &tc->link.base);
@@ -678,21 +677,21 @@ static int tc_get_display_props(struct tc_data *tc)
tc->link.base.num_lanes = 2;
}
- ret = drm_dp_dpcd_readb(&tc->aux, DP_MAX_DOWNSPREAD, tmp);
+ ret = drm_dp_dpcd_readb(&tc->aux, DP_MAX_DOWNSPREAD, ®);
if (ret < 0)
goto err_dpcd_read;
- tc->link.spread = tmp[0] & DP_MAX_DOWNSPREAD_0_5;
+ tc->link.spread = reg & DP_MAX_DOWNSPREAD_0_5;
- ret = drm_dp_dpcd_readb(&tc->aux, DP_MAIN_LINK_CHANNEL_CODING, tmp);
+ ret = drm_dp_dpcd_readb(&tc->aux, DP_MAIN_LINK_CHANNEL_CODING, ®);
if (ret < 0)
goto err_dpcd_read;
tc->link.scrambler_dis = false;
/* read assr */
- ret = drm_dp_dpcd_readb(&tc->aux, DP_EDP_CONFIGURATION_SET, tmp);
+ ret = drm_dp_dpcd_readb(&tc->aux, DP_EDP_CONFIGURATION_SET, ®);
if (ret < 0)
goto err_dpcd_read;
- tc->link.assr = tmp[0] & DP_ALTERNATE_SCRAMBLER_RESET_ENABLE;
+ tc->link.assr = reg & DP_ALTERNATE_SCRAMBLER_RESET_ENABLE;
dev_dbg(tc->dev, "DPCD rev: %d.%d, rate: %s, lanes: %d, framing: %s\n",
tc->link.base.revision >> 4, tc->link.base.revision & 0x0f,
--
2.21.0
next prev parent reply other threads:[~2019-06-07 4:47 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-07 4:45 [PATCH v4 00/15] tc358767 driver improvements Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 01/15] drm/bridge: tc358767: Simplify tc_poll_timeout() Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 02/15] drm/bridge: tc358767: Simplify polling in tc_main_link_setup() Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 03/15] drm/bridge: tc358767: Simplify polling in tc_link_training() Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 04/15] drm/bridge: tc358767: Simplify tc_set_video_mode() Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 05/15] drm/bridge: tc358767: Drop custom tc_write()/tc_read() accessors Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 06/15] drm/bridge: tc358767: Simplify AUX data read Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 07/15] drm/bridge: tc358767: Simplify AUX data write Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 08/15] drm/bridge: tc358767: Increase AUX transfer length limit Andrey Smirnov
2019-06-07 4:45 ` [PATCH v4 09/15] drm/bridge: tc358767: Use reported AUX transfer size Andrey Smirnov
2019-06-07 6:10 ` Andrzej Hajda
2019-06-07 4:45 ` [PATCH v4 10/15] drm/bridge: tc358767: Add support for address-only I2C transfers Andrey Smirnov
2019-06-07 6:13 ` Andrzej Hajda
2019-06-07 4:45 ` [PATCH v4 11/15] drm/bridge: tc358767: Introduce tc_set_syspllparam() Andrey Smirnov
2019-06-07 6:15 ` Andrzej Hajda
2019-06-07 4:45 ` [PATCH v4 12/15] drm/bridge: tc358767: Introduce tc_pllupdate_pllen() Andrey Smirnov
2019-06-07 6:20 ` Andrzej Hajda
2019-06-07 4:45 ` [PATCH v4 13/15] drm/bridge: tc358767: Simplify tc_aux_wait_busy() Andrey Smirnov
2019-06-07 6:21 ` Andrzej Hajda
2019-06-07 4:45 ` Andrey Smirnov [this message]
2019-06-07 6:41 ` [PATCH v4 14/15] drm/bridge: tc358767: Drop unnecessary 8 byte buffer Andrzej Hajda
2019-06-07 4:45 ` [PATCH v4 15/15] drm/bridge: tc358767: Replace magic number in tc_main_link_enable() Andrey Smirnov
2019-06-07 6:42 ` Andrzej Hajda
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