--- /dev/null
+From 22ed8a923ea9483c1c642eccab2dbf578be30d9c Mon Sep 17 00:00:00 2001
+From: Sasha Levin <sashal@kernel.org>
+Date: Fri, 15 Apr 2022 18:25:12 +0200
+Subject: drm/panel/raspberrypi-touchscreen: Avoid NULL deref if not
+ initialised
+
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+
+[ Upstream commit f92055ae0acb035891e988ce345d6b81a0316423 ]
+
+If a call to rpi_touchscreen_i2c_write from rpi_touchscreen_probe
+fails before mipi_dsi_device_register_full is called, then
+in trying to log the error message if uses ts->dsi->dev when
+it is still NULL.
+
+Use ts->i2c->dev instead, which is initialised earlier in probe.
+
+Fixes: 2f733d6194bd ("drm/panel: Add support for the Raspberry Pi 7" Touchscreen.")
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+Link: https://patchwork.freedesktop.org/patch/msgid/20220415162513.42190-2-stefan.wahren@i2se.com
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+---
+ drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
+index 06bd03915973..2073e0e43e2f 100644
+--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
++++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
+@@ -233,7 +233,7 @@ static void rpi_touchscreen_i2c_write(struct rpi_touchscreen *ts,
+
+ ret = i2c_smbus_write_byte_data(ts->i2c, reg, val);
+ if (ret)
+- dev_err(&ts->dsi->dev, "I2C write failed: %d\n", ret);
++ dev_err(&ts->i2c->dev, "I2C write failed: %d\n", ret);
+ }
+
+ static int rpi_touchscreen_write(struct rpi_touchscreen *ts, u16 reg, u32 val)
+--
+2.35.1
+
--- /dev/null
+From 8cb666405811457d67ae6578f096ab92d99879b9 Mon Sep 17 00:00:00 2001
+From: Sasha Levin <sashal@kernel.org>
+Date: Fri, 15 Apr 2022 18:25:13 +0200
+Subject: drm/panel/raspberrypi-touchscreen: Initialise the bridge in prepare
+
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+
+[ Upstream commit 5f18c0782b99e26121efa93d20b76c19e17aa1dd ]
+
+The panel has a prepare call which is before video starts, and an
+enable call which is after.
+The Toshiba bridge should be configured before video, so move
+the relevant power and initialisation calls to prepare.
+
+Fixes: 2f733d6194bd ("drm/panel: Add support for the Raspberry Pi 7" Touchscreen.")
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+Link: https://patchwork.freedesktop.org/patch/msgid/20220415162513.42190-3-stefan.wahren@i2se.com
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+---
+ drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c | 11 +++++++++--
+ 1 file changed, 9 insertions(+), 2 deletions(-)
+
+diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
+index 2073e0e43e2f..f57eec47ef6a 100644
+--- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
++++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
+@@ -269,7 +269,7 @@ static int rpi_touchscreen_noop(struct drm_panel *panel)
+ return 0;
+ }
+
+-static int rpi_touchscreen_enable(struct drm_panel *panel)
++static int rpi_touchscreen_prepare(struct drm_panel *panel)
+ {
+ struct rpi_touchscreen *ts = panel_to_ts(panel);
+ int i;
+@@ -299,6 +299,13 @@ static int rpi_touchscreen_enable(struct drm_panel *panel)
+ rpi_touchscreen_write(ts, DSI_STARTDSI, 0x01);
+ msleep(100);
+
++ return 0;
++}
++
++static int rpi_touchscreen_enable(struct drm_panel *panel)
++{
++ struct rpi_touchscreen *ts = panel_to_ts(panel);
++
+ /* Turn on the backlight. */
+ rpi_touchscreen_i2c_write(ts, REG_PWM, 255);
+
+@@ -353,7 +360,7 @@ static int rpi_touchscreen_get_modes(struct drm_panel *panel)
+ static const struct drm_panel_funcs rpi_touchscreen_funcs = {
+ .disable = rpi_touchscreen_disable,
+ .unprepare = rpi_touchscreen_noop,
+- .prepare = rpi_touchscreen_noop,
++ .prepare = rpi_touchscreen_prepare,
+ .enable = rpi_touchscreen_enable,
+ .get_modes = rpi_touchscreen_get_modes,
+ };
+--
+2.35.1
+
--- /dev/null
+From f9ea4123bed085bbfe6078c87466f5319f665463 Mon Sep 17 00:00:00 2001
+From: Sasha Levin <sashal@kernel.org>
+Date: Tue, 19 Apr 2022 17:18:27 +0530
+Subject: powerpc/perf: Fix power9 event alternatives
+
+From: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
+
+[ Upstream commit 0dcad700bb2776e3886fe0a645a4bf13b1e747cd ]
+
+When scheduling a group of events, there are constraint checks done to
+make sure all events can go in a group. Example, one of the criteria is
+that events in a group cannot use the same PMC. But platform specific
+PMU supports alternative event for some of the event codes. During
+perf_event_open(), if any event group doesn't match constraint check
+criteria, further lookup is done to find alternative event.
+
+By current design, the array of alternatives events in PMU code is
+expected to be sorted by column 0. This is because in
+find_alternative() the return criteria is based on event code
+comparison. ie. "event < ev_alt[i][0])". This optimisation is there
+since find_alternative() can be called multiple times. In power9 PMU
+code, the alternative event array is not sorted properly and hence there
+is breakage in finding alternative events.
+
+To work with existing logic, fix the alternative event array to be
+sorted by column 0 for power9-pmu.c
+
+Results:
+
+With alternative events, multiplexing can be avoided. That is, for
+example, in power9 PM_LD_MISS_L1 (0x3e054) has alternative event,
+PM_LD_MISS_L1_ALT (0x400f0). This is an identical event which can be
+programmed in a different PMC.
+
+Before:
+
+ # perf stat -e r3e054,r300fc
+
+ Performance counter stats for 'system wide':
+
+ 1057860 r3e054 (50.21%)
+ 379 r300fc (49.79%)
+
+ 0.944329741 seconds time elapsed
+
+Since both the events are using PMC3 in this case, they are
+multiplexed here.
+
+After:
+
+ # perf stat -e r3e054,r300fc
+
+ Performance counter stats for 'system wide':
+
+ 1006948 r3e054
+ 182 r300fc
+
+Fixes: 91e0bd1e6251 ("powerpc/perf: Add PM_LD_MISS_L1 and PM_BR_2PATH to power9 event list")
+Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
+Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
+Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
+Link: https://lore.kernel.org/r/20220419114828.89843-1-atrajeev@linux.vnet.ibm.com
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+---
+ arch/powerpc/perf/power9-pmu.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/arch/powerpc/perf/power9-pmu.c b/arch/powerpc/perf/power9-pmu.c
+index c07b1615ee39..1aa083db77f1 100644
+--- a/arch/powerpc/perf/power9-pmu.c
++++ b/arch/powerpc/perf/power9-pmu.c
+@@ -143,11 +143,11 @@ int p9_dd22_bl_ev[] = {
+
+ /* Table of alternatives, sorted by column 0 */
+ static const unsigned int power9_event_alternatives[][MAX_ALT] = {
+- { PM_INST_DISP, PM_INST_DISP_ALT },
+- { PM_RUN_CYC_ALT, PM_RUN_CYC },
+- { PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL },
+- { PM_LD_MISS_L1, PM_LD_MISS_L1_ALT },
+ { PM_BR_2PATH, PM_BR_2PATH_ALT },
++ { PM_INST_DISP, PM_INST_DISP_ALT },
++ { PM_RUN_CYC_ALT, PM_RUN_CYC },
++ { PM_LD_MISS_L1, PM_LD_MISS_L1_ALT },
++ { PM_RUN_INST_CMPL_ALT, PM_RUN_INST_CMPL },
+ };
+
+ static int power9_get_alternatives(u64 event, unsigned int flags, u64 alt[])
+--
+2.35.1
+
drm-msm-mdp5-check-the-return-of-kzalloc.patch
net-macb-restart-tx-only-if-queue-pointer-is-lagging.patch
stat-fix-inconsistency-between-struct-stat-and-struc.patch
+drm-panel-raspberrypi-touchscreen-avoid-null-deref-i.patch
+drm-panel-raspberrypi-touchscreen-initialise-the-bri.patch
+powerpc-perf-fix-power9-event-alternatives.patch
projects / thirdparty / kernel / stable-queue.git / commitdiff
