linux-toradex.git/drivers/gpu/drm/msm/dsi, branch v4.2.2

drm/msm: dsi: fix compile errors when CONFIG_GPIOLIB=n

2015-06-11T17:11:05+00:00

I'm not sure where, exactly, but somewhere in here we must be relying on
an implicit include.

drivers/gpu/drm/msm/dsi/dsi_host.c: In function ‘dsi_host_init_panel_gpios’:
drivers/gpu/drm/msm/dsi/dsi_host.c:1356:2: error: implicit declaration of function ‘devm_gpiod_get’ [-Werror=implicit-function-declaration]
  msm_host->disp_en_gpio = devm_gpiod_get(panel_device,
  ^
drivers/gpu/drm/msm/dsi/dsi_host.c:1356:25: warning: assignment makes pointer from integer without a cast [enabled by default]
  msm_host->disp_en_gpio = devm_gpiod_get(panel_device,
                         ^
drivers/gpu/drm/msm/dsi/dsi_host.c:1364:3: error: implicit declaration of function ‘gpiod_direction_output’ [-Werror=implicit-function-declaration]
   ret = gpiod_direction_output(msm_host->disp_en_gpio, 0);
   ^
drivers/gpu/drm/msm/dsi/dsi_host.c:1371:20: warning: assignment makes pointer from integer without a cast [enabled by default]
  msm_host->te_gpio = devm_gpiod_get(panel_device, "disp-te");
                    ^
drivers/gpu/drm/msm/dsi/dsi_host.c:1378:3: error: implicit declaration of function ‘gpiod_direction_input’ [-Werror=implicit-function-declaration]
   ret = gpiod_direction_input(msm_host->te_gpio);
   ^
drivers/gpu/drm/msm/dsi/dsi_host.c: In function ‘msm_dsi_host_power_on’:
drivers/gpu/drm/msm/dsi/dsi_host.c:1918:3: error: implicit declaration of function ‘gpiod_set_value’ [-Werror=implicit-function-declaration]
   gpiod_set_value(msm_host->disp_en_gpio, 1);
   ^

Signed-off-by: Brian Norris 
Cc: David Airlie 
Cc: Rob Clark 
Cc: Hai Li 
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Rob Clark

drm/msm: use devm_gpiod_get_optional for optional reset gpio

2015-06-11T17:11:05+00:00

Since 39b2bbe3d715 (gpio: add flags argument to gpiod_get*() functions)
which appeared in v3.17-rc1, the gpiod_get* functions take an additional
parameter that allows to specify direction and initial value for output.

Also there is a variant to find optional gpios that returns NULL if
there is no gpio instead of -ENOENT.

Make use of both features to simplify the driver.

This makes error checking more strict because errors like -ENOSYS ("no
gpio support compiled in") or -EPROBE_DEFER ("gpio not ready yet") are
handled correctly now.

Furthermore this is one caller less that stops us making the flags
argument to gpiod_get*() mandatory.

Reviewed-by: Linus Walleij 
Signed-off-by: Uwe Kleine-König 
Signed-off-by: Rob Clark

drm/msm/dsi: Separate PHY to another platform device

2015-06-11T17:11:05+00:00

There are different types of PHY from one chipset to another, while
the DSI host controller is relatively consistent across platforms.
Also, the PLL inside PHY is providing the source of DSI byte and
pixel clocks, which are used by DSI host controller. Separated devices
for clock provider and clock consumer make DSI driver better fit into
common clock framework.

Signed-off-by: Hai Li 
Signed-off-by: Rob Clark

drm/msm/dsi: Enable PLL driver in MSM DSI

2015-06-11T17:11:04+00:00

This change activates PLL driver for DSI to work with
common clock framework.

Signed-off-by: Hai Li 
Signed-off-by: Rob Clark

drm/msm/dsi: Add DSI PLL clock driver support

2015-06-11T17:11:04+00:00

DSI byte clock and pixel clocks are sourced from DSI PLL.
This change adds the DSI PLL source clock driver under
common clock framework.

This change handles DSI 28nm PLL only.

Signed-off-by: Hai Li 
Signed-off-by: Archit Taneja 
Signed-off-by: Stephane Viau 
Signed-off-by: Wentao Xu 
Signed-off-by: Rob Clark

drm/msm: use IS_ERR() to check regulator_get() return

2015-06-11T17:11:04+00:00

regulator_get() never returns NULL. There's no need for IS_ERR_OR_NULL()

Signed-off-by: Fabian Frederick 
Signed-off-by: Rob Clark

drm/msm: use IS_ERR() to check msm_ioremap() return

2015-06-11T17:11:04+00:00

msm_ioremap() never returns NULL. There's no need for IS_ERR_OR_NULL()

Signed-off-by: Fabian Frederick 
Signed-off-by: Rob Clark

drm/msm: dsi: Provide option to force continuous HS clock

2015-06-11T17:11:03+00:00

Some DSI peripherals rely on the HS clock on DSI clock lane as their clock
source. If the clock lane transitions between HS and LP states, it
can disrupt the functioning of such peripherals.

The mipi dsi mode flag MIPI_DSI_CLOCK_NON_CONTINUOUS already exists for
such peripheral drivers. Use it to configure the bit CLKLN_HS_FORCE_REQUEST
in DSI_LANE_CTRL.

Signed-off-by: Archit Taneja 
Signed-off-by: Rob Clark

drm/msm: update generated headers

2015-06-11T17:11:01+00:00

Signed-off-by: Rob Clark

drm/msm/dsi: Simplify the code to get the number of read byte

2015-05-14T20:57:25+00:00

During cmd rx, only new versions of H/W provide register to read back
the real number of byte returned by panel. For the old versions, reading
this register will not get the right number. In fact, we only need to
assume the returned data is the same size as we expected, because later
we will check the data type to detect error.

Signed-off-by: Hai Li