drm/i915: Enabling 128x128 and 256x256 ARGB Cursor Support

With this patch we allow larger cursor planes of sizes 128x128
and 256x256.

v2: Added more precise check on size while setting cursor plane.

v3: Changes related to restructuring cursor size restrictions
and DRM_DEBUG usage.

v4: Indentation related changes for setting cursor control and
implementing DRM_CAP_CURSOR_WIDTH and DRM_CAP_CURSOR_HEIGHT

Testcase: igt/kms_cursor_crc
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: David Airlie <airlied@linux.ie>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: G, Pallavi <pallavi.g@intel.com>
Signed-off-by: Sagar Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 6174fda..74f7d85 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -3553,7 +3553,11 @@ enum punit_power_well {
 /* New style CUR*CNTR flags */
 #define   CURSOR_MODE          0x27
 #define   CURSOR_MODE_DISABLE   0x00
+#define   CURSOR_MODE_128_32B_AX 0x02
+#define   CURSOR_MODE_256_32B_AX 0x03
 #define   CURSOR_MODE_64_32B_AX 0x07
+#define   CURSOR_MODE_128_ARGB_AX ((1 << 5) | CURSOR_MODE_128_32B_AX)
+#define   CURSOR_MODE_256_ARGB_AX ((1 << 5) | CURSOR_MODE_256_32B_AX)
 #define   CURSOR_MODE_64_ARGB_AX ((1 << 5) | CURSOR_MODE_64_32B_AX)
 #define   MCURSOR_PIPE_SELECT  (1 << 28)
 #define   MCURSOR_PIPE_A       0x00

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 5f68491..7be5984 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7599,10 +7599,26 @@ static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base)
        bool visible = base != 0;
 
        if (intel_crtc->cursor_visible != visible) {
+               int16_t width = intel_crtc->cursor_width;
                uint32_t cntl = I915_READ(CURCNTR(pipe));
                if (base) {
                        cntl &= ~(CURSOR_MODE | MCURSOR_PIPE_SELECT);
-                       cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
+                       cntl |= MCURSOR_GAMMA_ENABLE;
+
+                       switch (width) {
+                       case 64:
+                               cntl |= CURSOR_MODE_64_ARGB_AX;
+                               break;
+                       case 128:
+                               cntl |= CURSOR_MODE_128_ARGB_AX;
+                               break;
+                       case 256:
+                               cntl |= CURSOR_MODE_256_ARGB_AX;
+                               break;
+                       default:
+                               WARN_ON(1);
+                               return;
+                       }
                        cntl |= pipe << 28; /* Connect to correct pipe */
                } else {
                        cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
@@ -7627,10 +7643,25 @@ static void ivb_update_cursor(struct drm_crtc *crtc, u32 base)
        bool visible = base != 0;
 
        if (intel_crtc->cursor_visible != visible) {
+               int16_t width = intel_crtc->cursor_width;
                uint32_t cntl = I915_READ(CURCNTR_IVB(pipe));
                if (base) {
                        cntl &= ~CURSOR_MODE;
-                       cntl |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
+                       cntl |= MCURSOR_GAMMA_ENABLE;
+                       switch (width) {
+                       case 64:
+                               cntl |= CURSOR_MODE_64_ARGB_AX;
+                               break;
+                       case 128:
+                               cntl |= CURSOR_MODE_128_ARGB_AX;
+                               break;
+                       case 256:
+                               cntl |= CURSOR_MODE_256_ARGB_AX;
+                               break;
+                       default:
+                               WARN_ON(1);
+                               return;
+                       }
                } else {
                        cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE);
                        cntl |= CURSOR_MODE_DISABLE;
@@ -7726,9 +7757,11 @@ static int intel_crtc_cursor_set(struct drm_crtc *crtc,
                goto finish;
        }
 
-       /* Currently we only support 64x64 cursors */
-       if (width != 64 || height != 64) {
-               DRM_ERROR("we currently only support 64x64 cursors\n");
+       /* Check for which cursor types we support */
+       if (!((width == 64 && height == 64) ||
+                       (width == 128 && height == 128 && !IS_GEN2(dev)) ||
+                       (width == 256 && height == 256 && !IS_GEN2(dev)))) {
+               DRM_DEBUG("Cursor dimension not supported\n");
                return -EINVAL;
        }
 
@@ -10514,6 +10547,16 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
 
        drm_crtc_init(dev, &intel_crtc->base, &intel_crtc_funcs);
 
+       if (IS_GEN2(dev)) {
+               intel_crtc->max_cursor_width = GEN2_CURSOR_WIDTH;
+               intel_crtc->max_cursor_height = GEN2_CURSOR_HEIGHT;
+       } else {
+               intel_crtc->max_cursor_width = CURSOR_WIDTH;
+               intel_crtc->max_cursor_height = CURSOR_HEIGHT;
+       }
+       dev->mode_config.cursor_width = intel_crtc->max_cursor_width;
+       dev->mode_config.cursor_height = intel_crtc->max_cursor_height;
+
        drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256);
        for (i = 0; i < 256; i++) {
                intel_crtc->lut_r[i] = i;

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 60ffad3..fa99104 100644 (file)
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -78,6 +78,12 @@
 #define MAX_OUTPUTS 6
 /* maximum connectors per crtcs in the mode set */
 
+/* Maximum cursor sizes */
+#define GEN2_CURSOR_WIDTH 64
+#define GEN2_CURSOR_HEIGHT 64
+#define CURSOR_WIDTH 256
+#define CURSOR_HEIGHT 256
+
 #define INTEL_I2C_BUS_DVO 1
 #define INTEL_I2C_BUS_SDVO 2
 
@@ -367,6 +373,7 @@ struct intel_crtc {
        uint32_t cursor_addr;
        int16_t cursor_x, cursor_y;
        int16_t cursor_width, cursor_height;
+       int16_t max_cursor_width, max_cursor_height;
        bool cursor_visible;
 
        struct intel_plane_config plane_config;