diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2020-07-03 14:59:01 +0200 |
|---|---|---|
| committer | Patrik Jakobsson <patrik.r.jakobsson@gmail.com> | 2020-08-19 15:48:09 +0200 |
| commit | 172c1e8572809de8313e311614ff2baf6b936339 (patch) | |
| tree | 4087387f444509f6abe8482dc11e273fd09180ee /drivers/gpu/drm/gma500/mdfld_dsi_output.c | |
| parent | 9c6b876c91c067353ab30b81ad1486105bc79e08 (diff) | |
drm: gma500: Convert to GPIO descriptors
Finalize he conversion of GMA500 to use only GPIO descriptors.
The GPIO look-up-table is associated with the device directly
in the GMA500 Medfield chip driver since no explicit platform
type device (such as in x86/platform/intel-mid) exists: the
GMA500 probes directly from the PCI device. Apparently GPIOs
128 and 34 are used on all of these so just go ahead and
register those for resetting the DSI pipes.
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200703125901.513476-1-linus.walleij@linaro.org
Diffstat (limited to 'drivers/gpu/drm/gma500/mdfld_dsi_output.c')
| -rw-r--r-- | drivers/gpu/drm/gma500/mdfld_dsi_output.c | 51 |
1 files changed, 26 insertions, 25 deletions
diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_output.c b/drivers/gpu/drm/gma500/mdfld_dsi_output.c index 2f3486f32fed..4aab76613bd9 100644 --- a/drivers/gpu/drm/gma500/mdfld_dsi_output.c +++ b/drivers/gpu/drm/gma500/mdfld_dsi_output.c @@ -28,6 +28,7 @@ #include <linux/delay.h> #include <linux/moduleparam.h> #include <linux/pm_runtime.h> +#include <linux/gpio/consumer.h> #include <asm/intel_scu_ipc.h> @@ -432,42 +433,42 @@ static int mdfld_dsi_get_default_config(struct drm_device *dev, return 0; } -int mdfld_dsi_panel_reset(int pipe) +int mdfld_dsi_panel_reset(struct drm_device *ddev, int pipe) { - unsigned gpio; - int ret = 0; - + struct device *dev = ddev->dev; + struct gpio_desc *gpiod; + + /* + * Raise the GPIO reset line for the corresponding pipe to HIGH, + * this is probably because it is active low so this takes the + * respective pipe out of reset. (We have no code to put it back + * into reset in this driver.) + */ switch (pipe) { case 0: - gpio = 128; + gpiod = gpiod_get(dev, "dsi-pipe0-reset", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod)) + return PTR_ERR(gpiod); break; case 2: - gpio = 34; + gpiod = gpiod_get(dev, "dsi-pipe2-reset", GPIOD_OUT_HIGH); + if (IS_ERR(gpiod)) + return PTR_ERR(gpiod); break; default: - DRM_ERROR("Invalid output\n"); + DRM_DEV_ERROR(dev, "Invalid output pipe\n"); return -EINVAL; } + gpiod_put(gpiod); - ret = gpio_request(gpio, "gfx"); - if (ret) { - DRM_ERROR("gpio_rqueset failed\n"); - return ret; - } - - ret = gpio_direction_output(gpio, 1); - if (ret) { - DRM_ERROR("gpio_direction_output failed\n"); - goto gpio_error; - } + /* Flush posted writes on the device */ + gpiod = gpiod_get(dev, "dsi-pipe0-reset", GPIOD_ASIS); + if (IS_ERR(gpiod)) + return PTR_ERR(gpiod); + gpiod_get_value(gpiod); + gpiod_put(gpiod); - gpio_get_value(128); - -gpio_error: - if (gpio_is_valid(gpio)) - gpio_free(gpio); - - return ret; + return 0; } /* |